iOS調用相冊和攝像頭

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.


UIImageView *imageView = [[UIImageView alloc] init];
imageView.frame = CGRectMake(0, 0, 80, 120);
imageView.backgroundColor = [UIColor greenColor];
imageView.tag = 101;

[self.view addSubview:imageView];

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(0, 200, 100, 30);
[button setTitle:@"打開相冊" forState:UIControlStateNormal];
[button addTarget:self action:@selector(openPics) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];

UIButton *button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button2.frame = CGRectMake(0, 300, 100, 30);
[button2 setTitle:@"打開相機" forState:UIControlStateNormal];
[button2 addTarget:self action:@selector(openCamera) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];

}
// 打開相機

(void)openCamera {
  // UIImagePickerControllerCameraDeviceRear 后置攝像頭
  // UIImagePickerControllerCameraDeviceFront 前置攝像頭
  BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
  if (!isCamera) {

  NSLog(@"沒有攝像頭");
  return ;

}
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
  imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
  imagePicker.delegate = self;
  // 編輯模式
  imagePicker.allowsEditing = YES;
[self  presentViewController:imagePicker animated:YES completion:^{
  }];


}
// 打開相冊

(void)openPics {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
  imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
  imagePicker.delegate = self;
  [self  presentViewController:imagePicker animated:YES completion:^{
  }];


}
// 選中照片

(void)imagePickerController:(UIImagePickerController )picker didFinishPickingMediaWithInfo:(NSDictionary )info{
  NSLog(@"%@", info);
  UIImageView  imageView = (UIImageView )[self.view viewWithTag:101];
  // UIImagePickerControllerOriginalImage 原始圖片
  // UIImagePickerControllerEditedImage 編輯后圖片
  UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
  imageView.image = image;
  [picker dismissViewControllerAnimated:YES completion:NULL];

}
// 取消相冊

(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
  [picker dismissViewControllerAnimated:YES completion:NULL];

}</pre>