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 }