ios - 暂停计时器、UIView 动画和音频 iOS

Question

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？

Answer 1

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