CALayerDelegate的实现(IOS)
浏览数：42 /
时间：2015年06月11日
CALayerDelegate的实现(IOS)
by 伍雪颖
- (void)viewDidLoad {
[super viewDidLoad];
CALayer *blueLayer = [CALayer layer];
blueLayer.frame = CGRectMake(50, 50, 100, 100);
blueLayer.backgroundColor = [UIColor blueColor].CGColor;
[self.layerView.layer addSublayer:blueLayer];
blueLayer.delegate = self;
blueLayer.contentsScale = [UIScreen mainScreen].scale;
[blueLayer display];
}
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
CGContextSetLineWidth(ctx, 10);
CGContextSetStrokeColorWithColor(ctx, [UIColor redColor].CGColor);
CGContextStrokeEllipseInRect(ctx, layer.bounds);
[super viewDidLoad];
CALayer *blueLayer = [CALayer layer];
blueLayer.frame = CGRectMake(50, 50, 100, 100);
blueLayer.backgroundColor = [UIColor blueColor].CGColor;
[self.layerView.layer addSublayer:blueLayer];
blueLayer.delegate = self;
blueLayer.contentsScale = [UIScreen mainScreen].scale;
[blueLayer display];
}
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
CGContextSetLineWidth(ctx, 10);
CGContextSetStrokeColorWithColor(ctx, [UIColor redColor].CGColor);
CGContextStrokeEllipseInRect(ctx, layer.bounds);
}
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