1 //
 2 //  YYViewController.m
 3 //  01-截屏
 4 //
 5 //  Created by apple on 14-6-12.
 6 //  Copyright (c) 2014年 itcase. All rights reserved.
 7 //
 8
 9 #import "YYViewController.h"
10 #import "MBProgressHUD+NJ.h"
11
12 @interface YYViewController ()
13 @property (weak, nonatomic) IBOutlet UIView *contentView;
14 - (IBAction)BtnClick:(UIButton *)sender;
15
16 @end
17
18 @implementation YYViewController
19
20 - (void)viewDidLoad
21 {
22     [super viewDidLoad];
23 }
24
25 - (IBAction)BtnClick:(UIButton *)sender {
26
27     //延迟两秒保存
28     dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
29         //获取图形上下文
30         //    UIGraphicsBeginImageContext(self.view.frame.size);
31         UIGraphicsBeginImageContext(self.contentView.frame.size);
32         //将view绘制到图形上下文中
33
34         //    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
35         [self.contentView.layer renderInContext:UIGraphicsGetCurrentContext()];
36
37
38         //将截屏保存到相册
39         UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
40
41         UIImageWriteToSavedPhotosAlbum(newImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
42     });
43 }
44
45  - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
46 {
47     if (error) {
48         [MBProgressHUD showError:@"保存失败，请检查是否拥有相关的权限"];
49     }else
50     {
51 //        [MBProgressHUD showMessage:@"保存成功！"];
52         [MBProgressHUD showSuccess:@"保存成功！"];
53     }
54 }
55
56 @end

1      // 3.从上下文中取出绘制好的图片
2      UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
3
4      NSData *data = UIImagePNGRepresentation(newImage);
5
6      NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"abc.png"];
7      NSLog(@"%@", path);
8      [data writeToFile:path atomically:YES];