Question

我收到有关电影播放器的通知：

[[NSNotificationCenter defaultCenter] addObserver:self 
            selector:@selector(moviePlayBackDidFinish:) 
             name:MPMoviePlayerPlaybackDidFinishNotification 
              object:nil];

它是处理程序：

- (void) moviePlayBackDidFinish:(NSNotification*)notification 
{    
 [[UIApplication sharedApplication] setStatusBarHidden:YES];

  // Remove observer
 [[NSNotificationCenter  defaultCenter] 
  removeObserver:self
  name:MPMoviePlayerPlaybackDidFinishNotification 
  object:nil];

 [self dismissModalViewControllerAnimated:YES]; 
}

在这个处理程序方法中，我想检查完成按钮是否是发件人。因为这个方法我有两个发件人。怎么检查这个？

Answer 1

每个文档：MPMoviePlayerPlaybackDidFinishNotification userInfo字典必须包含NSNUmber MPMoviePlayerPlaybackDidFinishReasonUserInfoKey键，表示播放完成的原因。它的可能值：

enum {
   MPMovieFinishReasonPlaybackEnded,
   MPMovieFinishReasonPlaybackError,
   MPMovieFinishReasonUserExited
};

Answer 2

首先需要在操作前为按钮指定标签，然后检查发件人标签的值。

只需添加以下代码行：

- (void) moviePlayBackDidFinish:(NSNotification*)notification {
      NSInteger anyInteger = [sender tag];
      //Now check the value of the anyInteger and write the code accordingly.
     //switch case or if condition whatever you want.
}

就是这样。

Answer 3

使用按钮添加标签并根据标签放置条件。

或通过

检查

if([sender isEqual:btn1])
{

}
else 
{

}

Answer 4

这是一个旧线程，但我在寻找解决方案时偶然发现它，并且接受的解决方案没有显示最终代码。这是你要做的：

- (void) moviePlayBackDidFinish:(NSNotification*)notification

{
的NSLog（@ “moviePlayBackDidFinish”）;

// Remove observer

[[NSNotificationCenter defaultCenter] removeObserver：self 名称：MPMoviePlayerPlaybackDidFinishNotification 对象：无];

NSInteger movieFinishReason=  [[[notification userInfo]objectForKey:
                               MPMoviePlayerPlaybackDidFinishReasonUserInfoKey] intValue];


if(movieFinishReason == 2 || movieFinishReason == 1 || movieFinishReason == 0){
    [self dismissViewControllerAnimated:YES completion:nil];
}
/*
 MPMovieFinishReasonPlaybackEnded  = 0,//played movie sucessfuly.
 MPMovieFinishReasonPlaybackError = 1, //error in playing movie
 MPMovieFinishReasonUserExited = 2;  //user quitting the application / user pressed done button
 */

}

是否可以检查是否按下了完成按钮

4 个答案: