1 1.
2 // 1.创建个图片对象
3 UIImage *image = [UIImage imageNamed:@"buttongreen"];
4
5 // 2.根据图片创建一个可以拉伸的图片
6 image = [image resizableImageWithCapInsets:UIEdgeInsetsMake(10, 10, 10, 10)];
7
8 [self.btn setBackgroundImage:image forState:UIControlStateNormal];
9
10 2.
11
12 // 1.创建个图片对象
13 UIImage *image = [UIImage imageNamed:@"chat"];
14
15 // 2.获得可拉伸的区域
16 CGFloat imageW = image.size.width;
17 CGFloat imageH = image.size.height;
18 // 3.根据图片创建一个可以拉伸的图片
19 image = [image resizableImageWithCapInsets:UIEdgeInsetsMake(imageH * 0.5, imageW * 0.5, imageH * 0.5, imageW * 0.5) resizingMode:UIImageResizingModeTile];
20 [self.btn setBackgroundImage:image forState:UIControlStateNormal];
