我有一个 viewController，我正在其中使用 AVAudioPlayer 播放声音并且计时器使用 NSTimer 运行 2 分钟并且正在使用播放一系列动画
[UIView animateWithDuration:2.0
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
//Rolling the Man's tongue out
_cooling2ManImage.alpha = 1.0;
_cooling3ManImage.alpha = 0.0;
}
completion:^(BOOL boolValue){
[UIView animateWithDuration:2.0
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
//showing the Arrow image and translating the arrow to the mouth
_cooling1ArrowImage.alpha = 1.0;
_cooling1ArrowImage.transform = CGAffineTransformMakeTranslation(0,-110);
}
completion:^(BOOL boolValue){
[UIView animateWithDuration:1.5
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
//Hiding the arrow
_cooling1ArrowImage.alpha = 0.0;
}
completion:^(BOOL boolValue){
_cooling1ArrowImage.transform = CGAffineTransformMakeTranslation(0,0);
[UIView animateWithDuration:2.0
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
//Roll the tongue back in
_cooling2ManImage.alpha = 0.0;
_cooling3ManImage.alpha = 1.0;
}
completion:^(BOOL boolValue){
//Show the arrow and translate it
[UIView animateWithDuration:2.0
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
_cooling3ArrowImage.alpha = 1.0;
CGAffineTransform scale;
CGAffineTransform translate;
scale = CGAffineTransformMakeScale(2.5, 2.5);
translate = CGAffineTransformMakeTranslation(0, 40);
_cooling3ArrowImage.transform = CGAffineTransformConcat(scale, translate);
_cooling3ArrowImage.alpha = 0.0;
}
completion:^(BOOL boolValue){
[UIView animateWithDuration:2.0
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
_cooling2ManImage.alpha = 0.0;
_cooling3ManImage.alpha = 1.0;
_cooling1ArrowImage.alpha = 0.0;
_cooling3ArrowImage.alpha = 0.0;
_cooling3ArrowImage.transform = CGAffineTransformMakeTranslation(0,0);
_cooling3ArrowImage.transform = CGAffineTransformMakeScale(1,1);
if (count <= 6 ) {
[self startAnimation1];
count += 1;
NSLog(@"%i",count);
}
}
completion:nil];
}];
}];
}];
}];
}];
我必须实现暂停和恢复功能，以便当用户点击“暂停”按钮时，音频、动画和计时器暂停，当用户点击恢复按钮时，它会从暂停的位置准确恢复。谁能告诉我如何实现这一目标？
最佳答案
供 AVAudioPlayer 使用
[avplayerObject pause];
[avplayerObject play];
for timer:
您可以存储自计时器启动以来耗时量...当计时器启动时，将日期存储在 NSDate 变量中。然后，当用户切换时...使用 NSDate 类中的 timeIntervalSinceNow 方法来存储已经过去了多少时间...请注意，这将为 timeIntervalSinceNow 提供负值。当用户返回时，使用该值来设置适当的计时器。
用于查看动画 check this one
关于ios - 暂停计时器、UIView 动画和音频 iOS，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16210466/