UItableView 所有内容保存为图片

将所有的UITableView保存为图片，因为UITableView只能保存显示当前，所以，就单个保存后，合并为一张图片

代码如下：

01
-(IBAction)savePic:(id)sender
02
 
03
{
04
 
05
    //支持retian高分辨率
06
 
07
    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, YES, 0.0);
08
 
09
    float curH = mTableView.contentSize.height;
10
 
11
    UIImageView *allView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, curH)];
12
 
13
    for (float f = 0; f < curH; f+=460)
14
 
15
    {
16
 
17
        mTableView.contentOffset = CGPointMake(0, f);
18
 
19
            [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
20
 
21
        UIImageView *imgV = [[UIImageView alloc]initWithImage:UIGraphicsGetImageFromCurrentImageContext()];
22
 
23
        imgV.frame = CGRectMake(0, f, 320, 460);
24
 
25
        [allView addSubview:imgV];
26
 
27
        [imgV release];
28
 
29
    }
30
 
31
    UIGraphicsEndImageContext();
32
 
33
    //保存图片
34
 
35
   UIGraphicsBeginImageContextWithOptions(allView.frame.size, YES, 0.0);
36
 
37
    [allView.layer renderInContext:UIGraphicsGetCurrentContext()];
38
 
39
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
40
 
41
    UIGraphicsEndImageContext();
42
 
43
    [allView release];
44
 
45
    [UIImagePNGRepresentation(img) writeToFile:@"/users/test/desktop/font.png" atomically:YES];
46
 
47
}