Question

我创建了两个UIButton，只有播放按钮出现在UIToolbar上。在我想要的播放方法中，当按下播放按钮时，它显示暂停按钮，如果用户按下暂停按钮，它会暂停音频文件，然后显示播放按钮。

UIButton *playButton = [UIButton buttonWithType:UIButtonTypeCustom];

[playButton addTarget:self action:@selector(play:) forControlEvents:UIControlEventTouchUpInside];

playButton.frame = CGRectMake(0, 0, 50, 50);

UIImage *image = [UIImage imageNamed:@"play.png"];

[playButton setImage:image forState:UIControlStateNormal];

UIBarButtonItem *play = [[UIBarButtonItem alloc] initWithCustomView:playButton];



UIButton *pauseButton = [UIButton buttonWithType:UIButtonTypeCustom];

 [pauseButton addTarget:self action:@selector(pause:) forControlEvents:UIControlEventTouchUpInside];

pauseButton.frame = CGRectMake(0, 0, 50, 50);

UIImage *imge = [UIImage imageNamed:@"pause.png"];

[pauseButton setImage:imge forState:UIControlStateNormal];

-(void)play:(id)sender 
{

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"theme" 
                                                     ofType:@"mp3"];

NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:filePath];

audioPlayer = [[AVAudioPlayer alloc] 
              initWithContentsOfURL:fileURL error:nil];

audioPlayer.currentTime = 0;

[audioPlayer play];

[fileURL release];  

}

我需要帮助来实现这个

在游戏方法中

我做了

[audioPlayer play];

UIImage *imge = [UIImage imageNamed:@"pause.png"];

[pauseButton setImage:imge forState:UIControlStateNormal];

[audioPlayer pause];

UIImage *image = [UIImage imageNamed:@"play.png"];

[playButton setImage:image forState:UIControlStateNormal];

[audioPlayer Play];

我认为我做错了方法

请建议。

感谢您的帮助。

由于

Answer 1

每个州仅使用一个带有1个图像的按钮（选定和正常）：

UIButton *mediaButton = [UIButton buttonWithType:UIButtonTypeCustom];
mediaButton.frame = CGRectMake(0, 0, 50, 50);

[mediaButton setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal];
[mediaButton setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateSelected];

[playButton addTarget:self action:@selector(mediaAction:) forControlEvents:UIControlEventTouchUpInside];

-(void)mediaAction:(UIButton *)sender 
{
   if(sender.selected){
    // pause action
   } else {
    // play action
   }

    sender.selected = !sender.selected;
}

Answer 2

您不必创建两个单独的按钮。只需创建一个按钮和一个方法。只需将状态保存在布尔变量中或使用播放器状态即可。在方法中检查状态之后，做你需要做的事情。

但是，如果您坚持创建两个单独的按钮，则可以隐藏并显示其中一个按钮。

Answer 3

你的意思是：

if([audioPlayer isPlaying]) {
    UIImage *imge = [UIImage imageNamed:@"pause.png"];
    [pauseButton setImage:imge forState:UIControlStateNormal];
    [audioPlayer pause];
}
else {
    UIImage *image = [UIImage imageNamed:@"play.png"];
    [playButton setImage:image forState:UIControlStateNormal];
    [audioPlayer Play];
}

是对的吗？

在播放/暂停UIButtons之间切换

3 个答案: