iOS开发-OC之图片保存到相册

1. #import "ViewController.h"  
2.   
3. @interface ViewController ()  
4.   
5. @property (nonatomic , strong)UIAlertView *myAlertView;  
6. @property (nonatomic , strong)UIAlertView *myAlertView2;  
7.   
8. @end  
9.   
10. @implementation ViewController  
11.   
12. - (void)viewDidLoad {  
13.     [super viewDidLoad];  
14.     UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];  
15.     imageView.image = [UIImage imageNamed:@"User_load.jpg"];  
16.     imageView.tag = 10001;  
17.     imageView.userInteractionEnabled = YES;  
18.     [self.view addSubview:imageView];  
19.     //长按  
20.     UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPassAction:)];  
21.     [imageView addGestureRecognizer:longPress];  
22.     //判定为长按手势 需要的时间  
23.     longPress.minimumPressDuration = 1;  
24.     //判定时间,允许用户移动的距离  
25.     longPress.allowableMovement = 100;  
26.       
27.       
28. }  
29. //长按手势  
30. - (void)longPassAction:(UILongPressGestureRecognizer *)longPress{  
31.     NSLog(@"11111");  
32.     //长按手势  
33.     if (longPress.state == UIGestureRecognizerStateBegan) {  
34.         self.myAlertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"您要保存当前图片到相册中吗？" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"保存", nil nil];  
35.         [self.myAlertView show];  
36.         
37.     }  
38. }  
39. - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex  
40. {  
41.     if (buttonIndex == 1) {  
42.         // 保存照片(获取到点击的 image)  
43. //        NSInteger i = self.scroll.contentOffset.x / self.scroll.bounds.size.width;  
44.         UIImageView *myImageView = (UIImageView *)[self.view viewWithTag:10001];  
45.         UIImageWriteToSavedPhotosAlbum(myImageView.image, self, @selector(image:didFinshSavingWithError:contextInfo:), nil);  
46.     }  
47.   
48. }  
49. // 保存图片错误提示方法  
50. - (void)image:(UIImage *)image didFinshSavingWithError:(NSError *)error contextInfo:(voidvoid *)contextInfo  
51. {  
52.     NSString *mes = nil;  
53.     if (error != nil) {  
54.         mes = @"保存图片失败";  
55.     } else {  
56.         mes = @"保存图片成功";  
57.     }  
58.     self.myAlertView2 = [[UIAlertView alloc] initWithTitle:@"提示" message:mes delegate:self cancelButtonTitle:nil otherButtonTitles:nil];  
59.     [self.myAlertView2 show];  
60.     [NSTimer scheduledTimerWithTimeInterval:0.8f target:self selector:@selector(performDismiss:) userInfo:nil repeats:NO];  
61. }  
62.   
63. - (void)performDismiss:(NSTimer *)timer  
64. {  
65.     [self.myAlertView2 dismissWithClickedButtonIndex:0 animated:YES];  
66. }  
67. - (void)didReceiveMemoryWarning {  
68.     [super didReceiveMemoryWarning];  
69.     // Dispose of any resources that can be recreated.  
70. }  
71.   
72.   
73. @end