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| | |
| | | // |
| | | // 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 |