ios - 使用 UIImagePickerController 从照片库中访问相机

Question

有很多关于如何添加按钮以从相机 View 访问照片库的示例，但我似乎找不到任何关于这样做的其他方法。

在我的应用程序中，图像的主要来源是库，但如果用户真的愿意，我也想让他们使用相机。如果可能的话，我想避免额外的步骤，即展示带有两个选项(库和相机)或一些类似解决方案的操作表。另外，我不希望有两个专用按钮。

Answer 1

我使用这段代码:

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
  self.imgPicker  = [[UIImagePickerController alloc] init];

  if(buttonIndex == 0) {
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
      self.imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
      self.imgPicker.allowsEditing = NO;
      self.imgPicker.delegate = self;
      self.imgPicker.videoQuality = UIImagePickerControllerQualityTypeHigh;
    }
  }

  if(buttonIndex == 1) {
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])  {
      self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
      self.imgPicker.allowsEditing = NO;
      self.imgPicker.delegate = self;
    }
  }
  [self performSelector:@selector(showPicker) withObject:self afterDelay:0.6f];
}

- (void)showPicker {
  [self presentModalViewController:self.imgPicker animated:YES];
}