uiimage拉伸

原始图片：

拉伸后图片：

具体代码，很简单：

    UIImage *bgImage = [[UIImage imageNamed:@"search_edit_bg.png"] stretchableImageWithLeftCapWidth:2 topCapHeight:0];
//    UIImage *tempImage = [[UIImage imageNamed:@"remind_tohome_btn.png"] stretchableImageWithLeftCapWidth:2 topCapHeight:0];
    UIView *theView = [[UIView alloc] initWithFrame:frame];
    theView.backgroundColor = [UIColor clearColor];
    
    UIImageView *bgImageView = [[UIImageView alloc] initWithFrame:theView.bounds];
    bgImageView.image = bgImage;
    [theView addSubview:bgImageView];
    [bgImageView release];

从第二个像素，依次复制向后拉伸。

另外：textfiled，垂直居中：

textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

ok!

 

下面是网上copy的一段新的方法

2、（UIImage *）resizableImageWithCapInsets:(UIEdgeInsets)
//方法介绍
- (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets NS_AVAILABLE_IOS(5_0); // create a resizable version of this image. the interior is tiled when drawn.
- (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode NS_AVAILABLE_IOS(6_0); // the interior is resized according to the resizingMode
//参数结构
typedef struct UIEdgeInsets {
    CGFloat top, left, bottom, right;  // specify amount to inset (positive) for each of the edges. values can be negative to 'outset'
} UIEdgeInsets;
//用法示例

UIImageView *ImageView=[[UIImageView alloc]init];
[ ImageView  setFrame:CGRectMake(126.0, 80.2, 30.0, 20.0)];
   UIEdgeInsets ed = {0.0f, 10.0f, 0.0f, 10.0f};
   [ImageView setImage:[[UIImage imageNamed:@"xxx.png"]resizableImageWithCapInsets:ed]];
   self.view addSubview:ImageView ];
//以上左10.0，右10.0，是左边10像素以内右边10像素以内不拉伸，中间拉伸。如果上下左右都有参数，就说明九宫格的四个角不拉伸，其他都拉伸