//
|
// HMScannerMaskView.m
|
// HMQRCodeScanner
|
//
|
// Created by 刘凡 on 16/1/3.
|
// Copyright © 2016年 itheima. All rights reserved.
|
//
|
|
#import "HMScannerMaskView.h"
|
|
@implementation HMScannerMaskView
|
|
+ (instancetype)maskViewWithFrame:(CGRect)frame cropRect:(CGRect)cropRect {
|
|
HMScannerMaskView *maskView = [[self alloc] initWithFrame:frame];
|
|
maskView.backgroundColor = [UIColor clearColor];
|
maskView.cropRect = cropRect;
|
|
return maskView;
|
}
|
|
- (void)setCropRect:(CGRect)cropRect {
|
_cropRect = cropRect;
|
|
[self setNeedsDisplay];
|
}
|
|
- (void)drawRect:(CGRect)rect {
|
|
CGContextRef ctx = UIGraphicsGetCurrentContext();
|
|
[[UIColor colorWithWhite:0.0 alpha:0.4] setFill];
|
CGContextFillRect(ctx, rect);
|
|
CGContextClearRect(ctx, self.cropRect);
|
|
[[UIColor colorWithWhite:0.95 alpha:1.0] setStroke];
|
CGContextStrokeRectWithWidth(ctx, CGRectInset(_cropRect, 1, 1), 1);
|
}
|
|
@end
|
