事先准备一张图片:
UIImage *image = [UIImage
imageNamed:@"red.png"];
在iOS 5.0之前能够这么用:
NSInteger leftCapWidth = image.size.width *
0.5f;
NSInteger topCapHeight = image.size.height *
0.5f;
image = [image stretchableImageWithLeftCapWidth:leftCapWidth
topCapHeight:topCapHeight];
在iOS 5.0中能够这么用:
CGFloat top = 8;// 顶端盖高度
CGFloat bottom = 8; // 底端盖高度
CGFloat left = 8; // 左端盖宽度
CGFloat right = 8;// 右端盖宽度
UIEdgeInsets insets = UIEdgeInsetsMake(top, left, bottom, right);
// 伸缩后又一次赋值
image = [image resizableImageWithCapInsets:insets];
在iOS6.0中能够这么用:
CGFloat top = 12;
// 顶端盖高度
CGFloat bottom =
12 ; //
底端盖高度
CGFloat left =
10; //
左端盖宽度
CGFloat right =
10; //
右端盖宽度
UIEdgeInsets insets =
UIEdgeInsetsMake(top, left, bottom, right);
// 指定为拉伸模式,伸缩后又一次赋值
image = [image resizableImageWithCapInsets:insets
resizingMode:UIImageResizingModeStretch];