给UILabel添加背景图片：
self.accountLabel = [[UILabel
alloc]initWithFrame:CGRectMake(kXW(accountBtn),
kY(accountBtn), 250,
32)];
self.accountLabel.backgroundColor = [UIColor
colorWithPatternImage:[UIImage
imageNamed:@"qipao.png"]];
图片拉伸：
在iOS6.0中，UIImage提供了一个方法处理图片拉伸
-
- (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode
- UIImageResizingModeStretch：拉伸模式，通过拉伸UIEdgeInsets指定的矩形区域来填充图片
- UIImageResizingModeTile：平铺模式，通过重复显示UIEdgeInsets指定的矩形区域来填充图片
-
CGFloat top = 25;
-
CGFloat bottom = 25 ;
-
CGFloat left = 10;
-
CGFloat right = 10;
-
UIEdgeInsets insets = UIEdgeInsetsMake(top, left, bottom, right);
-
-
image = [image resizableImageWithCapInsets:insets resizingMode:UIImageResizingModeStretch];
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图片处理
原文：http://blog.csdn.net/tubiebutu/article/details/46818483
