学步园

1.给图层添加背景图片：
 myView.layer.contents = (id)[UIImage imageNamed:@"view_BG.png"].CGImage;
 
 2.将图层的边框设置为圆脚 
myWebView.layer.cornerRadius = 8;
myWebView.layer.masksToBounds = YES;
 
3.给图层添加一个有色边框
myWebView.layer.borderWidth = 5;
myWebView.layer.borderColor = [[UIColor colorWithRed:0.52 green:0.09 blue:0.07 alpha:1] CGColor];

http://www.cnblogs.com/gushuo/archive/2010/11/16/1878688.html