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 }