//
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// UIImage+RoundedCorner.m
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// SelectTags
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//
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// Created by jm on 16/2/22.
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// Copyright © 2016年 Jim. All rights reserved.
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//
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#import "UIImage+RoundedCorner.h"
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@implementation UIImage (RoundedCorner)
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- (UIImage *)jm_imageWithRoundedCornersAndSize:(CGSize)sizeToFit andCornerRadius:(CGFloat)radius {
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return [UIImage jm_imageWithRoundedCornersAndSize:sizeToFit CornerRadius:radius borderColor:nil borderWidth:0 backgroundColor:nil backgroundImage:self withContentMode:UIViewContentModeScaleAspectFill];
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}
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- (UIImage *)jm_imageWithRoundedCornersAndSize:(CGSize)sizeToFit andCornerRadius:(CGFloat)radius withContentMode:(UIViewContentMode)contentMode {
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return [UIImage jm_imageWithRoundedCornersAndSize:sizeToFit CornerRadius:radius borderColor:nil borderWidth:0 backgroundColor:nil backgroundImage:self withContentMode:contentMode];
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}
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+ (UIImage *)jm_imageWithRoundedCornersAndSize:(CGSize)sizeToFit CornerRadius:(CGFloat)radius borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth {
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return [UIImage jm_imageWithRoundedCornersAndSize:sizeToFit CornerRadius:radius borderColor:borderColor borderWidth:borderWidth backgroundColor:nil backgroundImage:nil withContentMode:UIViewContentModeScaleToFill];
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}
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+ (UIImage *)jm_imageWithRoundedCornersAndSize:(CGSize)sizeToFit andCornerRadius:(CGFloat)radius andColor:(UIColor *)color {
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return [UIImage jm_imageWithRoundedCornersAndSize:sizeToFit CornerRadius:radius borderColor:nil borderWidth:0 backgroundColor:color backgroundImage:nil withContentMode:UIViewContentModeScaleToFill];
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}
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+ (UIImage *)jm_imageWithRoundedCornersAndSize:(CGSize)sizeToFit CornerRadius:(CGFloat)radius borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth backgroundColor:(UIColor *)backgroundColor backgroundImage:(UIImage *)backgroundImage withContentMode:(UIViewContentMode)contentMode {
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return [UIImage jm_imageWithRoundedCornersAndSize:sizeToFit JMRadius:JMRadiusMake(radius, radius, radius, radius) borderColor:borderColor borderWidth:borderWidth backgroundColor:backgroundColor backgroundImage:backgroundImage withContentMode:contentMode];
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}
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+ (UIImage *)jm_imageWithRoundedCornersAndSize:(CGSize)sizeToFit JMRadius:(JMRadius)radius borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth backgroundColor:(UIColor *)backgroundColor backgroundImage:(UIImage *)backgroundImage withContentMode:(UIViewContentMode)contentMode {
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if (backgroundImage) {
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backgroundImage = [backgroundImage scaleToSize:CGSizeMake(sizeToFit.width, sizeToFit.height) withContentMode:contentMode backgroundColor:backgroundColor];
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backgroundColor = [UIColor colorWithPatternImage:backgroundImage];
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} else if (!backgroundColor){
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backgroundColor = [UIColor whiteColor];
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}
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UIGraphicsBeginImageContextWithOptions(sizeToFit, NO, UIScreen.mainScreen.scale);
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CGFloat halfBorderWidth = borderWidth / 2;
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//设置上下文
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CGContextRef context = UIGraphicsGetCurrentContext();
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//边框大小
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CGContextSetLineWidth(context, borderWidth);
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//边框颜色
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CGContextSetStrokeColorWithColor(context, borderColor.CGColor);
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//矩形填充颜色
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CGContextSetFillColorWithColor(context, backgroundColor.CGColor);
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CGFloat height = sizeToFit.height;
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CGFloat width = sizeToFit.width;
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radius = [UIImage transformationJMRadius:radius size:sizeToFit borderWidth:borderWidth];
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CGFloat startPointY;
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if (radius.topRightRadius >= height - borderWidth) {
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startPointY = height;
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} else if (radius.topRightRadius > 0){
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startPointY = halfBorderWidth + radius.topRightRadius;
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} else {
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startPointY = 0;
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}
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CGContextMoveToPoint(context, width - halfBorderWidth, startPointY); // 开始坐标右边开始
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CGContextAddArcToPoint(context, width - halfBorderWidth, height - halfBorderWidth, width / 2, height - halfBorderWidth, radius.bottomRightRadius); // 右下角角度
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CGContextAddArcToPoint(context, halfBorderWidth, height - halfBorderWidth, halfBorderWidth, height / 2, radius.bottomLeftRadius); // 左下角角度
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CGContextAddArcToPoint(context, halfBorderWidth, halfBorderWidth, width / 2, halfBorderWidth, radius.topLeftRadius); // 左上角
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CGContextAddArcToPoint(context, width - halfBorderWidth, halfBorderWidth, width - halfBorderWidth, height / 2, radius.topRightRadius); // 右上角
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CGContextDrawPath(context, kCGPathFillStroke); //根据坐标绘制路径
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UIImage *outImage = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return outImage;
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}
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+ (JMRadius)transformationJMRadius:(JMRadius)radius size:(CGSize)size borderWidth:(CGFloat)borderWidth {
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radius.topLeftRadius = minimum(size.width - borderWidth, size.height - borderWidth, radius.topLeftRadius - borderWidth / 2);
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radius.topRightRadius = minimum(size.width - borderWidth - radius.topLeftRadius, size.height - borderWidth, radius.topRightRadius - borderWidth / 2);
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radius.bottomLeftRadius = minimum(size.width - borderWidth, size.height - borderWidth - radius.topLeftRadius, radius.bottomLeftRadius - borderWidth / 2);
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radius.bottomRightRadius = minimum(size.width - borderWidth - radius.bottomLeftRadius, size.height - borderWidth - radius.topRightRadius, radius.bottomRightRadius - borderWidth / 2);
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return radius;
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}
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static inline CGFloat minimum(CGFloat a, CGFloat b, CGFloat c) {
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CGFloat minimum = MIN(MIN(a, b), c);
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return MAX(minimum, 0);
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}
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- (UIImage *)scaleToSize:(CGSize)size withContentMode:(UIViewContentMode)contentMode backgroundColor:(UIColor *)backgroundColor {
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CGRect rect = CGRectMake(0, 0, size.width, size.height);
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UIGraphicsBeginImageContextWithOptions(size, NO, UIScreen.mainScreen.scale);
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if (backgroundColor) {
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGContextSetFillColorWithColor(context, backgroundColor.CGColor);
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CGContextAddRect(context, rect);
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CGContextDrawPath(context, kCGPathFillStroke); //根据坐标绘制路径
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}
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[self drawInRect:CGRectMake(0.0f, 0.0f, size.width, size.height) withContentMode:contentMode];
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UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return scaledImage;
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}
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- (void)drawInRect:(CGRect)rect withContentMode:(UIViewContentMode)contentMode {
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[self drawInRect:[self convertRect:rect withContentMode:contentMode]];
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}
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- (CGRect)convertRect:(CGRect)rect withContentMode:(UIViewContentMode)contentMode {
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CGSize size = self.size;
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rect = CGRectStandardize(rect);
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size.width = size.width < 0 ? -size.width : size.width;
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size.height = size.height < 0 ? -size.height : size.height;
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CGPoint center = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect));
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switch (contentMode) {
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case UIViewContentModeRedraw:
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case UIViewContentModeScaleAspectFit:
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case UIViewContentModeScaleAspectFill: {
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if (rect.size.width < 0.01 || rect.size.height < 0.01 ||
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size.width < 0.01 || size.height < 0.01) {
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rect.origin = center;
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rect.size = CGSizeZero;
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} else {
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CGFloat scale;
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if (contentMode == UIViewContentModeScaleAspectFill) {
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if (size.width / size.height < rect.size.width / rect.size.height) {
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scale = rect.size.width / size.width;
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} else {
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scale = rect.size.height / size.height;
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}
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} else {
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if (size.width / size.height < rect.size.width / rect.size.height) {
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scale = rect.size.height / size.height;
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} else {
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scale = rect.size.width / size.width;
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}
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}
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size.width *= scale;
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size.height *= scale;
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rect.size = size;
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rect.origin = CGPointMake(center.x - size.width * 0.5, center.y - size.height * 0.5);
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}
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} break;
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case UIViewContentModeCenter: {
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rect.size = size;
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rect.origin = CGPointMake(center.x - size.width * 0.5, center.y - size.height * 0.5);
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} break;
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case UIViewContentModeTop: {
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rect.origin.x = center.x - size.width * 0.5;
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rect.size = size;
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} break;
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case UIViewContentModeBottom: {
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rect.origin.x = center.x - size.width * 0.5;
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rect.origin.y += rect.size.height - size.height;
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rect.size = size;
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} break;
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case UIViewContentModeLeft: {
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rect.origin.y = center.y - size.height * 0.5;
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rect.size = size;
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} break;
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case UIViewContentModeRight: {
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rect.origin.y = center.y - size.height * 0.5;
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rect.origin.x += rect.size.width - size.width;
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rect.size = size;
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} break;
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case UIViewContentModeTopLeft: {
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rect.size = size;
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} break;
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case UIViewContentModeTopRight: {
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rect.origin.x += rect.size.width - size.width;
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rect.size = size;
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} break;
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case UIViewContentModeBottomLeft: {
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rect.origin.y += rect.size.height - size.height;
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rect.size = size;
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} break;
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case UIViewContentModeBottomRight: {
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rect.origin.x += rect.size.width - size.width;
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rect.origin.y += rect.size.height - size.height;
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rect.size = size;
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} break;
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case UIViewContentModeScaleToFill:
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default: {
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rect = rect;
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}
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}
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return rect;
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}
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@end
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