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CALayerDelegate的实现(IOS)
CALayerDelegate的实现(IOS)
by 伍雪颖
- (void)viewDidLoad {
[superviewDidLoad];
CALayer *blueLayer = [CALayerlayer];
blueLayer.frame =CGRectMake(50,50,100,100);
blueLayer.backgroundColor = [UIColorblueColor].CGColor;
[self.layerView.layeraddSublayer:blueLayer];
blueLayer.delegate =self;
blueLayer.contentsScale = [UIScreenmainScreen].scale;
[blueLayer display];
}
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
CGContextSetLineWidth(ctx,10);
CGContextSetStrokeColorWithColor(ctx, [UIColorredColor].CGColor);
CGContextStrokeEllipseInRect(ctx, layer.bounds);
[superviewDidLoad];
CALayer *blueLayer = [CALayerlayer];
blueLayer.frame =CGRectMake(50,50,100,100);
blueLayer.backgroundColor = [UIColorblueColor].CGColor;
[self.layerView.layeraddSublayer:blueLayer];
blueLayer.delegate =self;
blueLayer.contentsScale = [UIScreenmainScreen].scale;
[blueLayer display];
}
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
CGContextSetLineWidth(ctx,10);
CGContextSetStrokeColorWithColor(ctx, [UIColorredColor].CGColor);
CGContextStrokeEllipseInRect(ctx, layer.bounds);
}
CALayerDelegate的实现(IOS)
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