iPhone中圖庫類UIImagePickerController

在app中想得到手機中的圖片，可使用類UIImagePickerController，經過這個類能夠得到手機中的圖片。使用這個類得到圖片，都須要遵照UIImagePickerControllerDelegate,UINavigationControllerDelegate協議，在選擇圖片完畢後使用代理方法- (void)imagePickerController:(nonnull UIImagePickerController *)picker didFinishPickingImage:(nonnull UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo便可得到選擇的圖片

 

 //得到圖片  在圖片選擇器中選擇

    UIImagePickerController *pickerController = [[UIImagePickerController alloc] init];

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

    

    //設置UIImagePickerControllerDelegate的代理

    pickerController.delegate = self;

 

- (void)imagePickerController:(nonnull UIImagePickerController *)picker didFinishPickingImage:(nonnull UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo{

    [self.imageList addObject:image];

    [self.collectionView reloadData];

    

    [self dismissViewControllerAnimated:YES completion:nil];

}