//
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// PNRadarChart.m
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// PNChartDemo
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//
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// Created by Lei on 15/7/1.
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// Copyright (c) 2015年 kevinzhow. All rights reserved.
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//
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#import "PNRadarChart.h"
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@interface PNRadarChart()
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@property (nonatomic) CGFloat centerX;
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@property (nonatomic) CGFloat centerY;
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@property (nonatomic) NSMutableArray *pointsToWebArrayArray;
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@property (nonatomic) NSMutableArray *pointsToPlotArray;
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@property (nonatomic) UILabel *detailLabel;
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@property (nonatomic) CGFloat lengthUnit;
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@property (nonatomic) CAShapeLayer *chartPlot;
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@end
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@implementation PNRadarChart
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- (id)initWithFrame:(CGRect)frame items:(NSArray *)items valueDivider:(CGFloat)unitValue {
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self=[super initWithFrame:frame];
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if (self) {
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self.backgroundColor = [UIColor clearColor];
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self.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
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//Public iVar
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if ([items count]< 3)//At least three corners of A polygon ,If the count of items is less than 3 will add 3 default values
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{
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NSLog( @"At least three items!");
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NSArray *defaultArray = @[[PNRadarChartDataItem dataItemWithValue:0 description:@"Default"],
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[PNRadarChartDataItem dataItemWithValue:0 description:@"Default"],
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[PNRadarChartDataItem dataItemWithValue:0 description:@"Default"],
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];
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defaultArray = [defaultArray arrayByAddingObjectsFromArray:items];
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_chartData = [NSArray arrayWithArray:defaultArray];
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}else{
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_chartData = [NSArray arrayWithArray:items];
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}
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_valueDivider = unitValue;
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_maxValue = 1;
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_webColor = [UIColor grayColor];
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_plotColor = [UIColor colorWithRed:.4 green:.8 blue:.4 alpha:.7];
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_fontColor = [UIColor blackColor];
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_graduationColor = [UIColor orangeColor];
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_fontSize = 15;
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_labelStyle = PNRadarChartLabelStyleHorizontal;
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_isLabelTouchable = YES;
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_isShowGraduation = NO;
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//Private iVar
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_centerX = frame.size.width/2;
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_centerY = frame.size.height/2;
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_pointsToWebArrayArray = [NSMutableArray array];
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_pointsToPlotArray = [NSMutableArray array];
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_lengthUnit = 0;
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_chartPlot = [CAShapeLayer layer];
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_chartPlot.lineCap = kCALineCapButt;
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_chartPlot.lineWidth = 1.0;
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[self.layer addSublayer:_chartPlot];
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[super setupDefaultValues];
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//init detailLabel
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_detailLabel = [[UILabel alloc] init];
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_detailLabel.backgroundColor = [UIColor colorWithRed:.9 green:.9 blue:.1 alpha:.9];
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_detailLabel.textAlignment = NSTextAlignmentCenter;
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_detailLabel.textColor = [UIColor colorWithWhite:1 alpha:1];
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_detailLabel.font = [UIFont systemFontOfSize:15];
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[_detailLabel setHidden:YES];
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[self addSubview:_detailLabel];
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[self strokeChart];
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}
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return self;
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}
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#pragma mark - main
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- (void)calculateChartPoints {
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[_pointsToPlotArray removeAllObjects];
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[_pointsToWebArrayArray removeAllObjects];
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//init Descriptions , Values and Angles.
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NSMutableArray *descriptions = [NSMutableArray array];
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NSMutableArray *values = [NSMutableArray array];
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NSMutableArray *angles = [NSMutableArray array];
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for (int i=0;i<_chartData.count;i++) {
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PNRadarChartDataItem *item = (PNRadarChartDataItem *)[_chartData objectAtIndex:i];
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[descriptions addObject:item.textDescription];
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[values addObject:[NSNumber numberWithFloat:item.value]];
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CGFloat angleValue = (float)i/(float)[_chartData count]*2*M_PI;
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[angles addObject:[NSNumber numberWithFloat:angleValue]];
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}
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//calculate all the lengths
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_maxValue = [self getMaxValueFromArray:values];
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CGFloat margin = 0;
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if (_labelStyle==PNRadarChartLabelStyleCircle) {
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margin = MIN(_centerX , _centerY)*3/10;
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}else if (_labelStyle==PNRadarChartLabelStyleHorizontal) {
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margin = [self getMaxWidthLabelFromArray:descriptions withFontSize:_fontSize];
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}
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CGFloat maxLength = ceil(MIN(_centerX, _centerY) - margin);
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int plotCircles = (_maxValue/_valueDivider);
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if (plotCircles > MAXCIRCLE) {
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NSLog(@"Circle number is higher than max");
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plotCircles = MAXCIRCLE;
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_valueDivider = _maxValue/plotCircles;
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}
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_lengthUnit = maxLength/plotCircles;
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NSArray *lengthArray = [self getLengthArrayWithCircleNum:(int)plotCircles];
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//get all the points and plot
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for (NSNumber *lengthNumber in lengthArray) {
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CGFloat length = [lengthNumber floatValue];
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[_pointsToWebArrayArray addObject:[self getWebPointWithLength:length angleArray:angles]];
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}
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int section = 0;
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for (id value in values) {
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CGFloat valueFloat = [value floatValue];
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if (valueFloat>_maxValue) {
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NSString *reason = [NSString stringWithFormat:@"Value number is higher than max -value: %f - maxValue: %f",valueFloat,_maxValue];
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@throw [NSException exceptionWithName:NSInvalidArgumentException reason:reason userInfo:nil];
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return;
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}
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CGFloat length = valueFloat/_maxValue*maxLength;
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CGFloat angle = [[angles objectAtIndex:section] floatValue];
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CGFloat x = _centerX +length*cos(angle);
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CGFloat y = _centerY +length*sin(angle);
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NSValue* point = [NSValue valueWithCGPoint:CGPointMake(x, y)];
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[_pointsToPlotArray addObject:point];
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section++;
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}
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//set the labels
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[self drawLabelWithMaxLength:maxLength labelArray:descriptions angleArray:angles];
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}
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#pragma mark - Draw
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- (void)drawRect:(CGRect)rect {
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// Drawing backgound
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGContextClearRect(context, rect);
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int section = 0;
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//circles
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for(NSArray *pointArray in _pointsToWebArrayArray){
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//plot backgound
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CGContextRef graphContext = UIGraphicsGetCurrentContext();
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CGContextBeginPath(graphContext);
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CGPoint beginPoint = [[pointArray objectAtIndex:0] CGPointValue];
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CGContextMoveToPoint(graphContext, beginPoint.x, beginPoint.y);
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for(NSValue* pointValue in pointArray){
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CGPoint point = [pointValue CGPointValue];
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CGContextAddLineToPoint(graphContext, point.x, point.y);
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}
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CGContextAddLineToPoint(graphContext, beginPoint.x, beginPoint.y);
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CGContextSetStrokeColorWithColor(graphContext, _webColor.CGColor);
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CGContextStrokePath(graphContext);
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}
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//cuts
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NSArray *largestPointArray = [_pointsToWebArrayArray lastObject];
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for (NSValue *pointValue in largestPointArray){
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section++;
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if (section==1&&_isShowGraduation)continue;
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CGContextRef graphContext = UIGraphicsGetCurrentContext();
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CGContextBeginPath(graphContext);
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CGContextMoveToPoint(graphContext, _centerX, _centerY);
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CGPoint point = [pointValue CGPointValue];
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CGContextAddLineToPoint(graphContext, point.x, point.y);
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CGContextSetStrokeColorWithColor(graphContext, _webColor.CGColor);
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CGContextStrokePath(graphContext);
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}
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}
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- (void)strokeChart {
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[self calculateChartPoints];
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[self setNeedsDisplay];
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[_detailLabel setHidden:YES];
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//Draw plot
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[_chartPlot removeAllAnimations];
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UIBezierPath *plotline = [UIBezierPath bezierPath];
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CGPoint beginPoint = [[_pointsToPlotArray objectAtIndex:0] CGPointValue];
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[plotline moveToPoint:CGPointMake(beginPoint.x, beginPoint.y)];
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for(NSValue *pointValue in _pointsToPlotArray){
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CGPoint point = [pointValue CGPointValue];
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[plotline addLineToPoint:CGPointMake(point.x ,point.y)];
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}
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[plotline setLineWidth:1];
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[plotline setLineCapStyle:kCGLineCapButt];
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_chartPlot.path = plotline.CGPath;
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_chartPlot.fillColor = _plotColor.CGColor;
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[self addAnimationIfNeeded];
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[self showGraduation];
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}
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#pragma mark - Helper
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- (void)drawLabelWithMaxLength:(CGFloat)maxLength labelArray:(NSArray *)labelArray angleArray:(NSArray *)angleArray {
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//set labels
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int labelTag = 121;
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while (true) {
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UIView *label = [self viewWithTag:labelTag];
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if(!label)break;
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[label removeFromSuperview];
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}
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int section = 0;
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CGFloat labelLength = maxLength + maxLength/10;
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for (NSString *labelString in labelArray) {
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CGFloat angle = [[angleArray objectAtIndex:section] floatValue];
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CGFloat x = _centerX + labelLength *cos(angle);
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CGFloat y = _centerY + labelLength *sin(angle);
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UILabel *label = [[UILabel alloc] init] ;
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label.backgroundColor = [UIColor clearColor];
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label.font = [UIFont systemFontOfSize:_fontSize];
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label.text = labelString;
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label.tag = labelTag;
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CGSize detailSize = [labelString sizeWithAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:_fontSize]}];
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switch (_labelStyle) {
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case PNRadarChartLabelStyleCircle:
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label.frame = CGRectMake(x-5*_fontSize/2, y-_fontSize/2, 5*_fontSize, _fontSize);
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label.transform = CGAffineTransformMakeRotation(((float)section/[labelArray count])*(2*M_PI)+M_PI_2);
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label.textAlignment = NSTextAlignmentCenter;
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break;
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case PNRadarChartLabelStyleHorizontal:
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if (x<_centerX) {
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label.frame = CGRectMake(x-detailSize.width, y-detailSize.height/2, detailSize.width, detailSize.height);
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label.textAlignment = NSTextAlignmentRight;
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}else{
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label.frame = CGRectMake(x, y-detailSize.height/2, detailSize.width , detailSize.height);
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label.textAlignment = NSTextAlignmentLeft;
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}
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break;
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case PNRadarChartLabelStyleHidden:
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[label setHidden:YES];
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break;
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default:
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break;
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}
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[label sizeToFit];
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label.userInteractionEnabled = YES;
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UITapGestureRecognizer *tapLabelGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapLabel:)];
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[label addGestureRecognizer:tapLabelGesture];
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[self addSubview:label];
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section ++;
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}
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}
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- (void)tapLabel:(UITapGestureRecognizer *)recognizer {
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UILabel *label=(UILabel*)recognizer.view;
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_detailLabel.frame = CGRectMake(label.frame.origin.x, label.frame.origin.y-30, 50, 25);
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for (PNRadarChartDataItem *item in _chartData) {
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if ([label.text isEqualToString:item.textDescription]) {
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_detailLabel.text = [NSString stringWithFormat:@"%.2f", item.value];
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break;
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}
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}
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[_detailLabel setHidden:NO];
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}
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- (void)showGraduation {
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int labelTag = 112;
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while (true) {
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UIView *label = [self viewWithTag:labelTag];
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if(!label)break;
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[label removeFromSuperview];
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}
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int section = 0;
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for (NSArray *pointsArray in _pointsToWebArrayArray) {
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section++;
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CGPoint labelPoint = [[pointsArray objectAtIndex:0] CGPointValue];
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UILabel *graduationLabel = [[UILabel alloc] initWithFrame:CGRectMake(labelPoint.x-_lengthUnit, labelPoint.y-_lengthUnit*5/8, _lengthUnit*5/8, _lengthUnit)];
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graduationLabel.adjustsFontSizeToFitWidth = YES;
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graduationLabel.tag = labelTag;
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graduationLabel.font = [UIFont systemFontOfSize:ceil(_lengthUnit)];
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graduationLabel.textColor = [UIColor orangeColor];
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graduationLabel.text = [NSString stringWithFormat:@"%.0f",_valueDivider*section];
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[self addSubview:graduationLabel];
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if (_isShowGraduation) {
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[graduationLabel setHidden:NO];
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}else{
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[graduationLabel setHidden:YES];}
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}
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}
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- (NSArray *)getWebPointWithLength:(CGFloat)length angleArray:(NSArray *)angleArray {
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NSMutableArray *pointArray = [NSMutableArray array];
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for (NSNumber *angleNumber in angleArray) {
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CGFloat angle = [angleNumber floatValue];
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CGFloat x = _centerX + length*cos(angle);
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CGFloat y = _centerY + length*sin(angle);
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[pointArray addObject:[NSValue valueWithCGPoint:CGPointMake(x,y)]];
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}
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return pointArray;
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}
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- (NSArray *)getLengthArrayWithCircleNum:(int)plotCircles {
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NSMutableArray *lengthArray = [NSMutableArray array];
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CGFloat length = 0;
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for (int i = 0; i < plotCircles; i++) {
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length += _lengthUnit;
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[lengthArray addObject:[NSNumber numberWithFloat:length]];
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}
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return lengthArray;
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}
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- (CGFloat)getMaxWidthLabelFromArray:(NSArray *)keyArray withFontSize:(CGFloat)size {
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CGFloat maxWidth = 0;
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for (NSString *str in keyArray) {
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CGSize detailSize = [str sizeWithAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:_fontSize]}];
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maxWidth = MAX(maxWidth, detailSize.width);
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}
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return maxWidth;
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}
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- (CGFloat)getMaxValueFromArray:(NSArray *)valueArray {
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CGFloat max = _maxValue;
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for (NSNumber *valueNum in valueArray) {
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CGFloat valueFloat = [valueNum floatValue];
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max = MAX(valueFloat, max);
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}
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return ceil(max);
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}
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- (void)addAnimationIfNeeded
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{
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if (self.displayAnimated) {
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CABasicAnimation *animateScale = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
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animateScale.fromValue = [NSNumber numberWithFloat:0.f];
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animateScale.toValue = [NSNumber numberWithFloat:1.0f];
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CABasicAnimation *animateMove = [CABasicAnimation animationWithKeyPath:@"position"];
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animateMove.fromValue = [NSValue valueWithCGPoint:CGPointMake(_centerX, _centerY)];
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animateMove.toValue = [NSValue valueWithCGPoint:CGPointMake(0, 0)];
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CABasicAnimation *animateAlpha = [CABasicAnimation animationWithKeyPath:@"opacity"];
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animateAlpha.fromValue = [NSNumber numberWithFloat:0.f];
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CAAnimationGroup *aniGroup = [CAAnimationGroup animation];
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aniGroup.duration = 1.f;
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aniGroup.repeatCount = 1;
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aniGroup.animations = [NSArray arrayWithObjects:animateScale,animateMove,animateAlpha, nil];
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aniGroup.removedOnCompletion = YES;
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[_chartPlot addAnimation:aniGroup forKey:nil];
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}
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}
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@end
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