Question

我试图UIImageView viewDidLoad闪烁.hidden=YES。我不确定最好的办法是什么。我尝试使用.hidden=NO和{{1}}的循环，但这似乎是一种不好的方法。我需要一些适当的建议。

Answer 1

试试这个：

-(void)blink:(UIView*)view count:(int) count
{
    if(count == 0)
    {
        return;
    }

    [UIView animateWithDuration:0.2 animations:^{

        view.alpha = 0.0;

    } completion:^(BOOL finished){

        [UIView animateWithDuration:0.2 animations:^{

            view.alpha = 1.0;

        } completion:^(BOOL finished){

            [self blink:view count:count-1];

        }];


    }];
}

或者如果你想让它永远眨眼，试试这个：

-(void)blinkForever:(UIView*)view
{
    [UIView animateWithDuration:0.2 delay:0.0 options:UIViewAnimationOptionAutoreverse|UIViewAnimationOptionRepeat animations:^{

        view.alpha = 0.0;

    } completion:nil];
}

Answer 2

如果你只想隐藏和显示然后使用NStimer为此目的像这样的东西

<。>在.h文件中添加此属性 @property（非原子，强）NSTimer *计时器;

if( url.search(".png") != -1 || url.search(".jpg") != -1 || url.search(".jpeg") != -1 || url.search(".tif") != -1 || url.search(".tiff") != -1){

<强>夫特：

public function e() {
 $criteria = new \Doctrine\Common\Collections\Criteria();
 $d=date('Y-m-d'); // i think your error is here
 $timestamp = strtotime($d); //here
 $date=date('Y-m-d',$timestamp); //and here

 $d = //place here where the date is coming from
 $date = date('Y-m-d', strtotime($d)); //formatter of date
 $criteria->where($criteria->expr()->lt('date',$date));
 $result=$this->em->getRepository('OCUserBundle:Tranche')->matching($criteria);
 return count($result);
}

但UIImageView也可以为不同的图像添加动画效果像这样的东西

- (void)onTimerEvent:(NSTimer*)timer
{
    self.imageView.hidden = !self.imageView.hidden;
}
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(onTimerEvent:) userInfo:nil repeats:YES];
}

Answer 3

您可以使用UIImageView的alpha。以下是一个示例（只需在startAnim中调用viewDidLoad）：

static NSInteger count = 0;
static NSInteger maxBlind = 10;

- (void)startAnim{

    CGFloat animDuration = 0.5f;
    [UIView animateWithDuration:animDuration
                     animations:^{
                         self.myImageView.alpha = 0.f;
                     } completion:^(BOOL finished) {
                         [UIView animateWithDuration:animDuration
                                          animations:^{
                                              self.myImageView.alpha = 1.f;
                                          } completion:^(BOOL finished) {
                                              if (count < maxBlind){
                                                  [self startAnim];
                                                  count++;
                                              }
                                          }];
                     }];
}

Answer 4

使用UIImageView动画，您可以放入空图像或空白图像：

http://spin.atomicobject.com/2014/08/27/animate-images-uiimageview-completion-handler/

享受

UIImageView闪烁动画

4 个答案: