学习iOS全局跑马灯

本文实例为大家分享了ios全局跑马灯制作方法，供大家参考，具体内容如下

思路：

1.创建一个单例

+ (instancetype)sharemanager {
 static ccpaomaview *pmodel = nil;
 static dispatch_once_t once;
 dispatch_once(&once, ^{
  pmodel = [[ccpaomaview alloc]initwithframe:cgrectmake(0, 0, kscreenwidth, 0.0468 *kscreenheight)];
 });
 return pmodel;
}

2.把接收的数据存在本地的 plist，不适用于大量数据，每次读取第一个数据，读取完成删除整个 plist，再把剩下的重新存进 plist

3.根据动画代理，监听动画执行结束，将动画实例置为 nil

- (void)animationdidstop:(caanimation *)anim finished:(bool)flag{
 nslog(@"%@",[self.paomalabel.layer animationforkey:@"paomadeng"]);
 if ([self.paomalabel.layer animationforkey:@"paomadeng"] == anim) {
  //移除第一组数据
  [_array removeobjectatindex:0];
  
  //移除整个 plist
  [ccpaomamodel removepaomaplist];
  
  //重新写入
  [_array writetofile:[ccpaomamodel filename] atomically:yes];
  
  //动画停止之后，将实例置为 nil
  _pmaniamtion = nil;
  
  //数组为空之后移除跑马灯
  if (_array.count > 0) {
   [self showpaomaview:self.superview];
  }else{
   self.hidden = yes;
   [self removefromsuperview];
  }
  nslog(@"%@",self.array);
 }
}

4.判断动画实例是否为空，使得切换界面，跑马灯继续，而不是重新开始

- (void)paomaaniamtion:(cgfloat)count{
 //判断动画实例存不存在，存在继续，不存在即创建
 if (_pmaniamtion == nil) {
  _pmaniamtion = [cabasicanimation animation];
  _pmaniamtion.keypath = @"transform.translation.x";
  cgfloat w = cgrectgetwidth(_paomalabel.bounds);
  _pmaniamtion.fromvalue = @(w);
  _pmaniamtion.tovalue = @(-w);
  _pmaniamtion.duration = _anitime;
  _pmaniamtion.repeatcount = count;
  _pmaniamtion.removedoncompletion = no;  //动画结束不移除
  _pmaniamtion.fillmode = kcafillmodeforwards; //动画结束会保持结束的状态
  _pmaniamtion.delegate = self;    //设置代理
  [_paomalabel.layer addanimation:_pmaniamtion forkey:@"paomadeng"];
 }else{
  _pmaniamtion.repeatcount = count;
 }
}

5.切换界面，暂停、恢复动画

#pragma mark -- 界面出现、消失，创建、恢复、暂停动画
- (void)viewwillappear:(bool)animated {
 [_paomaview showpaomaview:self.view];
 [_paomaview resumeanimation];
}

- (void)viewwilldisappear:(bool)animated {
 [_paomaview pauseaniamtion];
}

话不多说，github 见代码

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。