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今天闲来无事，看到很多APP在启动图后面添加了广告图，今天就动手做了一下，
刚开始，打算用通知在APPdelegate中添加这个图片，但是尝试后发现，效果不是很理想；就在rootVC中进行操作了
直接上代码：
-(void)gotoImage { self.window = [[UIApplication sharedApplication].delegate window]; self.mianImageview = [[UIImageView alloc]init]; _mianImageview.image = [UIImage imageNamed:@"mianimage.jpg"]; _mianImageview.frame = _window.bounds; _mianImageview.tag = 100; _mianImageview.userInteractionEnabled = YES; [_window addSubview:_mianImageview]; UITapGestureRecognizer *pan = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(clickmianimage)]; pan.numberOfTouchesRequired = 1; pan.numberOfTapsRequired = 1; [_mianImageview addGestureRecognizer:pan]; //创建UILabel 添加到当前view _labelText=[[UILabel alloc]initWithFrame:CGRectMake(40, MYScreenH-100, 80, 30)]; _labelText.backgroundColor = [UIColor redColor]; _labelText.textAlignment = NSTextAlignmentCenter; [_mianImageview addSubview:_labelText]; //设置倒计时总时长 _secondsCountDown = 2;//60秒倒计时 //开始倒计时 _countDownTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timeFireMethod) userInfo:nil repeats:YES]; //启动倒计时后会每秒钟调用一次方法 timeFireMethod //设置倒计时显示的时间 _labelText.text=[NSString stringWithFormat:@"%ldS",(long)_secondsCountDown]; dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(3.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ for (UIView *subviews in [_window subviews]) { if (subviews.tag ==100) { [UIView animateWithDuration:1.0 animations:^{ CGPoint center = _mianImageview.center; _mianImageview.width = 10000; _mianImageview.height = 10000; _mianImageview.center = center; subviews.alpha = 0; } completion:^(BOOL finished) { [subviews removeFromSuperview]; }]; } } }); }
这个方法在viewdidload:中调用；
倒计时的方法，每秒就调用一次：
-(void)timeFireMethod{ //倒计时-1 _secondsCountDown--; //修改倒计时标签现实内容 _labelText.text=[NSString stringWithFormat:@"%ldS",(long)_secondsCountDown]; //当倒计时到0时，做需要的操作，比如验证码过期不能提交 if(_secondsCountDown==-1){ [_countDownTimer invalidate]; [_labelText removeFromSuperview]; } }
下面的这个方法是这个广告图的点击方法，一般是跳到广告详情的，我在这里只是提前隐藏广告图
-(void)clickmianimage { for (UIView *subviews in [_window subviews]) { if (subviews.tag ==100) { [UIView animateWithDuration:0.5 animations:^{ CGPoint center = _mianImageview.center; _mianImageview.width = 10000; _mianImageview.height = 10000; _mianImageview.center = center; subviews.alpha = 0; } completion:^(BOOL finished) { [subviews removeFromSuperview]; }]; } } }
如果大神发现有什么问题，求在评论中指出：谢谢指教！
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原文地址：http://www.cnblogs.com/liuwenqiang/p/5653020.html
