ios - 如何在使用 objective-c 代码在 ios 中设置动画时识别 UIImageView 上的触摸事件？

Question

您好，我正在通过以下代码在 UIImageView 中为 4 个图像设置动画。 但问题是图像没有出现在 UIImageView 中。如果我尝试删除 swipeImage 代码，则图像出现在 UIImageView 中。如何让 imageview 出现在 UIImageView 中？

Oulet 已经对 UIImageView 属性进行了设置，如果我尝试在没有动画代码的情况下设置图像，UIImageView 有图像。使用动画，UIImageView 没有图像的外观。在此先感谢您的帮助。

属性

@property (weak , nonatomic )IBOutlet UIImageView *imgslide;

声明

    int scrlNo;
NSTimer *aTimer;

查看加载代码

  scrlNo = 0;

    imgslide.userInteractionEnabled = YES;
    [self addGestures];
    [self SwipeImages];

添加手势代码

-(void)addGestures //Adding Single Tap Gesture here
{
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageViewTap:)]; //init the TapGesture with the selector
    singleTap.cancelsTouchesInView = YES;
    [imgslide addGestureRecognizer:singleTap]; //Add it to imgslide, not to self.view

}

ImageViewTap代码

-(void)imageViewTap :(UITapGestureRecognizer *) gesture
{
    NSLog(@"Clicked image %d", scrlNo);
}

滑动图片代码或动画代码

- (void)SwipeImages
{
    if (scrlNo==1) {

        imgslide.image = [UIImage imageNamed:@"promo_banner_2.png"];


        scrlNo=2;
        [aTimer invalidate];

        aTimer = nil;
        aTimer=[NSTimer scheduledTimerWithTimeInterval:15
                                                target:self
                                              selector:@selector(SwipeImages)
                                              userInfo:nil
                                               repeats:YES];

    }else if (scrlNo==0) {



//        UIImage * img = [UIImage imageNamed:@"promo_banner_1.png"];
//        
//        [self.imageViewOutlet setImage:img];

        imgslide.image = [UIImage imageNamed:@"promo_banner_1.png"];


        scrlNo=1;
        [aTimer invalidate];

        aTimer = nil;
        aTimer=[NSTimer scheduledTimerWithTimeInterval:15
                                                target:self
                                              selector:@selector(SwipeImages)
                                              userInfo:nil
                                               repeats:YES];

    }
    else if (scrlNo==2) {

//        UIImage * img = [UIImage imageNamed:@"promo_banner_3.png"];
//        
//        [self.imageViewOutlet setImage:img];

        imgslide.image = [UIImage imageNamed:@"promo_banner_3.png"];


        scrlNo=3;
        [aTimer invalidate];

        aTimer = nil;
        aTimer=[NSTimer scheduledTimerWithTimeInterval:15
                                                target:self
                                              selector:@selector(SwipeImages)
                                              userInfo:nil
                                               repeats:YES];

    }
    else if (scrlNo==3) {


//        
//        UIImage * img = [UIImage imageNamed:@"promo_banner_7.png"];
//        
//        [self.imageViewOutlet setImage:img];

        imgslide.image = [UIImage imageNamed:@"promo_banner_7.png"];


        scrlNo=0;
        [aTimer invalidate];

        aTimer = nil;
        aTimer=[NSTimer scheduledTimerWithTimeInterval:15
                                                target:self
                                              selector:@selector(SwipeImages)
                                              userInfo:nil
                                               repeats:YES];
    }
    else if (scrlNo==4) {

    }
}

Answer 1

添加此方法并在 viewDidLoad 上加载此方法，而不是在 viewDidLoad 上加载 SwipeImages

-(void)addTimer
{
    aTimer=[NSTimer scheduledTimerWithTimeInterval:15
                                            target:self
                                          selector:@selector(SwipeImages)
                                          userInfo:nil
                                           repeats:YES];
}

然后你的 viewDidLoad 看起来像

scrlNo = 0;

    imgslide.userInteractionEnabled = YES;
    [self addGestures];
    [self addTimer];

并为此编辑 SwipeImages，

- (void)SwipeImages
{
    if (scrlNo==1) {
        imgslide.image = [UIImage imageNamed:@"promo_banner_2.png"];
        scrlNo=2;

    }else if (scrlNo==0) {
        imgslide.image = [UIImage imageNamed:@"promo_banner_1.png"];
        scrlNo=1;
    }
    else if (scrlNo==2) {
        imgslide.image = [UIImage imageNamed:@"promo_banner_3.png"];
        scrlNo=3;
    }
    else if (scrlNo==3) {
        imgslide.image = [UIImage imageNamed:@"promo_banner_7.png"];
        scrlNo=0;
    }
    else if (scrlNo==4) {

    }
}