ios截屏

 1 - (IBAction)captureView:(UIButton *)sender {
 2     
 3     // 延迟1 ~2 秒之后再截屏
 4     dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
 5         
 6         // 1.创建一个bitmap的上下文
 7         UIGraphicsBeginImageContext(self.view.frame.size);
 8         
 9         // 2.将屏幕绘制到上下文中
10         [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
11          UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
12         
13         /*
14         // 3.从上下文中取出绘制好的图片
15         UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
16         
17         NSData *data = UIImagePNGRepresentation(newImage);
18         
19         NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"abc.png"];
20         NSLog(@"%@", path);
21         [data writeToFile:path atomically:YES];
22         */
23         
24         // 4.保存图片到相册
25         UIImageWriteToSavedPhotosAlbum(newImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
26     });
27 
28 }
29 
30  - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
31 {
32     
33     if (error) {
34         [MBProgressHUD showError:@"保存失败, 请检测应用是否拥有访问相册的权限"];
35     }else
36     {
37         [MBProgressHUD showSuccess:@"保存成功"];
38     }
39 }