Question

我使用以下方式将模态推送到新的视图控制器：

[self presentViewController:picker];

然后从我所做的那个新视图控制器中开始;

  UIImagePickerController *picker = [[UIImagePickerController alloc] init];
  picker.sourceType = UIImagePickerControllerSourceTypeCamera;
 picker.delegate = self;
  [self presentViewController:picker animated:YES completion:nil];

但相机甚至不会显示，为什么？

Answer 1

我在iPad上遇到了同样的问题，下面的代码对我有用......

[[NSOperationQueue mainQueue] addOperationWithBlock:^{
    //present your view controller here...
}];

祝你好运！：）

Answer 2

这可能是由于以下几个原因造成的：

1）创建一个Camera Opening代码的方法：

-(void) openCamera {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil]; }

并在任何你想要的地方调用它，

[self performSelector:@selector(openCamera) withObject:nil afterDelay:0.1];

OR

2）在此方法中编写代码，

[[NSOperationQueue mainQueue] addOperationWithBlock:^{

     //... Camera Code ....

}];

在Modal View中显示UIImagePicker

2 个答案: