用CATextLayer来实现一个UILabel

by 伍雪颖
[img]http://img.blog.csdn.net/20150104212858888?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcmFpbmxlc3Zpbw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
    CATextLayer *textLayer = [CATextLayerlayer];
    textLayer.frame =CGRectMake(100,100,100,100);
    [self.view.layeraddSublayer:textLayer];
   
    textLayer.foregroundColor = [UIColorblackColor].CGColor;
    textLayer.alignmentMode =kCAAlignmentJustified;
    textLayer.wrapped =YES;
   
    UIFont *font = [UIFontsystemFontOfSize:15];
   
    CFStringRef fontName = (__bridgeCFStringRef)font.fontName;
    CGFontRef fontRef =CGFontCreateWithFontName(fontName);
    textLayer.font = fontRef;
    textLayer.fontSize = font.pointSize;
    CGFontRelease(fontRef);
   
    NSString *text =@"Cupid laid by his brand, and fell asleep";
   
    textLayer.string = text;


    textLayer.contentsScale = [UIScreen mainScreen].scale; // 在Retina显示