IOS学习笔记（九）UIImagePicker

 1 - (IBAction)openCamera:(id)sender 
 2 {
 3     //UIImagePickerController 类方法，判断源是否可用 UIImagePickerController是一个图片挑选控制器 可以通过三种途径挑选图片。Camera、PhotoLibrary、SavedPhotoAlbum
 4     BOOL hasCamera = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];//判断照相机是否可用（是否有摄像头）
 5     if(hasCamera == YES)
 6     {
 7         UIImagePickerController *picker = [[UIImagePickerController alloc] init];
 8         picker.sourceType = UIImagePickerControllerSourceTypeCamera;
 9         picker.delegate = self;
10         picker.allowsEditing = YES; //是否可编辑
11         [self presentModalViewController:picker animated:YES];
12         [picker release];
13     }
14     else
15     {
16         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你没有摄像头" delegate:nil cancelButtonTitle:@"ok!" otherButtonTitles:nil];
17         [alert show];
18         [alert release];
19     }
20     
21 }

 1 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
 2 {
 3     NSLog(@"%@",info);
 4 //    {
 5 //        UIImagePickerControllerCropRect = "NSRect: {{-1, 320}, {1937, 1937}}";
 6 //        UIImagePickerControllerEditedImage = "<UIImage: 0x196bd0>";
 7 //        UIImagePickerControllerMediaMetadata =     {
 8 //            DPIHeight = 72;
 9 //            DPIWidth = 72;
10 //            Orientation = 6;
11 //            "{Exif}" =         {
12 //                ApertureValue = "2.970853654340484";
13 //                BrightnessValue = "2.246098001053075";
14 //                ColorSpace = 1;
15 //                DateTimeDigitized = "2012:09:20 11:47:12";
16 //                DateTimeOriginal = "2012:09:20 11:47:12";
17 //                ExposureMode = 0;
18 //                ExposureProgram = 2;
19 //                ExposureTime = "0.06666666666666667";
20 //                FNumber = "2.8";
21 //                Flash = 24;
22 //                FocalLength = "3.85";
23 //                ISOSpeedRatings =             (
24 //                                               125
25 //                                               );
26 //                MeteringMode = 5;
27 //                PixelXDimension = 2592;
28 //                PixelYDimension = 1936;
29 //                SceneType = 1;
30 //                SensingMethod = 2;
31 //                Sharpness = 2;
32 //                ShutterSpeedValue = "3.911199862602335";
33 //                SubjectArea =             (
34 //                                           1295,
35 //                                           967,
36 //                                           699,
37 //                                           696
38 //                                           );
39 //                WhiteBalance = 0;
40 //            };
41 //            "{TIFF}" =         {
42 //                DateTime = "2012:09:20 11:47:12";
43 //                Make = Apple;
44 //                Model = "iPhone 4";
45 //                Software = "5.1.1";
46 //                XResolution = 72;
47 //                YResolution = 72;
48 //            };
49 //        };
50 //        UIImagePickerControllerMediaType = "public.image";
51 //        UIImagePickerControllerOriginalImage = "<UIImage: 0x18bb30>";
52 //    }
53     UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
54     imgV.image = image;
55     
56     //如果想把某个UIImage对象存储到默认相册，使用下面代码
57     //UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
58 
59     
60     [self dismissModalViewControllerAnimated:YES];
61 
62 }
63 
64 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
65 {
66     [self dismissModalViewControllerAnimated:YES];
67 }
68 
69 - (IBAction)openPhotoLibrary:(id)sender //相册列表
70 {
71     UIImagePickerController *picker = [[UIImagePickerController alloc] init];
72     picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
73     picker.delegate = self;
74     picker.allowsEditing = YES; //是否可编辑
75     [self presentModalViewController:picker animated:YES];
76     [picker release];
77 }
78 
79 - (IBAction)openSavedPhotoAlbum:(id)sender //默认相册
80 {
81     UIImagePickerController *picker = [[UIImagePickerController alloc] init];
82     picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
83     picker.delegate = self;
84     picker.allowsEditing = YES; //是否可编辑
85     [self presentModalViewController:picker animated:YES];
86     [picker release];
87 
88 }