返回一张自由拉伸的图片

#pragma mark- 返回一张自由拉伸的图片

+ (UIImage *)resizableImage:(NSString *)name

{

UIImage *image = [self imageWithName:name];

CGFloat left = image.size.width * 0.5;

CGFloat top = image.size.height * 0.5;

return [image stretchableImageWithLeftCapWidth:left topCapHeight:top];

}