ios中关于UIImagePickerController的一些知识总结

记得添加MobileCoreServices.framework

及导入#import <MobileCoreServices/MobileCoreServices.h>

 @interface PPViewController ()<UIActionSheetDelegate,UINavigationControllerDelegate, UIImagePickerControllerDelegate>

 {

     UIImagePickerController *_pickerController;

 }

 @property (weak, nonatomic) IBOutlet UIImageView *imageView;

 @end

 @implementation PPViewController

 - (void)viewDidLoad

 {

     [super viewDidLoad];

     _pickerController = [[UIImagePickerController alloc] init];

     _pickerController.delegate = self;//设置代理

     _pickerController.allowsEditing = YES;//图片可编辑（放大缩小）

 }

 - (IBAction)choseImage:(id)sender

 {

     // 判断是否有相机

     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])

     {

         //判断是否能摄像

         if ([[UIImagePickerController availableMediaTypesForSourceType:_pickerController.sourceType] containsObject:(NSString *)kUTTypeMovie])

         {

             _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeMovie];

             UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:nil otherButtonTitles:@"相册",@"相机",@"摄像机", nil];

             sheet.tag = ;

             [sheet showInView:self.view];

         }

         else

         {

             UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:nil otherButtonTitles:@"相机",@"相册", nil];

             sheet.tag = ;

             [sheet showInView:self.view];

         }

     }

     else

     {//模拟器

         UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:nil otherButtonTitles:@"相册", nil];

         sheet.tag = ;

         [sheet showInView:self.view];

     }

 }

 #pragma mark- UIActionSheet的代理方法

 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex

 {

     if (actionSheet.tag == )

     {

         switch (buttonIndex)

         {

             case :

             {

                 _pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;

                 _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];

                 [self presentViewController:_pickerController animated:YES completion:nil];

             }

                 break;

             case :

             {

                 _pickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

                 _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];

                 [self presentViewController:_pickerController animated:YES completion:nil];

             }

                 break;

             default:

                 break;

         }

     }

     if (actionSheet.tag == )

     {

         switch (buttonIndex)

         {

             case :

             {

                 _pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;

                 _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];

                 [self presentViewController:_pickerController animated:YES completion:nil];

             }

                 break;

             case :

             {

                 _pickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

 //                _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];

                 [self presentViewController:_pickerController animated:YES completion:nil];

             }

                 break;

             case :

             {

                 _pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;

                 //        pickController.videoQuality = UIImagePickerControllerQualityTypeLow;//可以选择图片质量

                 _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeMovie];

                 [self presentViewController:_pickerController animated:YES completion:nil];

             }

             default:

                 break;

         }

     }

     if (actionSheet.tag == )

     {

         if (buttonIndex == )

         {

             _pickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

 //            _pickerController.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];

             [self presentViewController:_pickerController animated:YES completion:nil];

         }

     }

 }

 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

 {

     NSLog(@"========%@",info);//返回的值都在info里面

     if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(NSString *)kUTTypeMovie])

     {

         _imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfFile:(NSString *)[[info objectForKey:UIImagePickerControllerMediaURL] path]]];

     }

     else

     {

         _imageView.image = [info objectForKey:@"UIImagePickerControllerEditedImage"];

     }

     [self dismissViewControllerAnimated:YES completion:nil];

 }

 //如果这是一个modalViewController，需要dismiss 它发了个cancel消息，必须关闭它

 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

 {

     [self dismissViewControllerAnimated:YES completion:nil];

 }

 /**

  *  {

  UIImagePickerControllerMediaType = "public.image";

  UIImagePickerControllerOriginalImage = "<UIImage: 0x7fe3a3dc2a20> size {1500, 1001} orientation 0 scale 1.000000";

  UIImagePickerControllerReferenceURL = "assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG";

  }

  */

 /**

  *  {

  UIImagePickerControllerCropRect = "NSRect: {{0, 0}, {1500, 1003}}";

  UIImagePickerControllerEditedImage = "<UIImage: 0x7fec5c8145b0> size {638, 426} orientation 0 scale 1.000000";

  UIImagePickerControllerMediaType = "public.image";

  UIImagePickerControllerOriginalImage = "<UIImage: 0x7fec5c80d4c0> size {1500, 1001} orientation 0 scale 1.000000";

  UIImagePickerControllerReferenceURL = "assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG";

  }

  */