我有一个按钮,可以在点按时在播放和暂停图像之间切换。当显示播放图像时,播放循环声音,当显示暂停图像时,声音停止播放。
我已经设法让这个工作,但有一个问题。当您点击按钮暂停(停止)时,它会最后一次播放声音(因此暂停动作会延迟声音的秒数。)
这是我的代码:
@implementation ViewController
AVAudioPlayer *myAudio;
- (void)viewDidLoad {
[super viewDidLoad];
[self.myButton setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal];
[self.myButton setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateSelected];
}
- (IBAction)buttonTapped:(id)sender {
NSURL *musicFile;
musicFile = [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"mp3"]];
myAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
if(self.myButton.selected)
[self.myButton setSelected:NO];
else
[self.myButton setSelected:YES];
if(self.myButton.selected)
[myAudio setNumberOfLoops:-1];
[myAudio play];
}
答案 0 :(得分:1)
您每次点击按钮时都在创建一个播放器。
您应该尝试创建一个AVPlayer
(在viewDidLoad
中),并在play
函数中使用pause
和buttonTapped:
个函数。
- (void)viewDidLoad {
[super viewDidLoad];
[self.myButton setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal];
[self.myButton setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateSelected];
NSURL *musicFile = [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"mp3"]];
myAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
}
- (IBAction)buttonTapped:(id)sender {
[self.myButton setSelected:!self.myButton.selected];
if (self.myButton.selected) {
[player seekToTime:kCMTimeZero];
[player play];
}
else {
[player pause];
}
}
点击按钮会首先切换它的状态(选择与否),然后根据其状态,播放器将倒带并开始播放,或暂停(立即)。