iOS 7 - UIImagePickerController中的黑色预览屏幕

Question

使用以下代码启动图像选择器来捕获图像。
任何一个可以帮帮忙，关闭这个问题...

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) 
    {   

    if (self.camera) 
    { 
     self.camera = nil; 
    } 

    self.camera = [[UIImagePickerController alloc] init]; 
    self.camera.sourceType = UIImagePickerControllerSourceTypeCamera; 
    self.camera.allowsEditing = NO; 
    self.camera.delegate = self; 

    [self presentViewController:self.camera animated:YES completion:NULL]; 


} 

Answer 1

推出的UIImagePickerController如果您有任何背景GCD可能是针对此问题的原因之前。在我的代码中有启动UIImagePickerController之前GCD，现在删除了GCD它工作正常。