Re: [問題] Draw a string in a specific CALayer
※ 引述《leondemon (狗狗)》之銘言：
: 想請教一個問題
: 我有一個UIView的subclass 打算將其(CALayer*)layer內多疊幾層其他的CALayer
: 其中一個sublayer是專門要畫text用的
: 因為CATextLayer的string似乎是沒有anti-aliasing
: 而用NSString的NSString UIKit Additions Category的drawInRect:WithFont:
: 似乎不是畫在指定的Layer上？
寫段 sample code：
...
CALayer *aLayer = [CALayer layer];
aLayer.frame = CGRectMake(10.0, 10.0, 200.0, 100.0);
aLayer.delegate = self;
[aLayer setNeedsDisplay];
[self.view.layer addSublayer:aLayer];
...
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx
{
UIGraphicsPushContext(ctx);
[[UIColor blueColor] set];
[@"Hello World!" drawInRect:layer.bounds withFont:[UIFont boldSystemFontOfSize:16.0]];
UIGraphicsPopContext();
}
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