Question

我是iPhone的新手，我正在使用单点按钮在KASlideShow自定义控件上使用UITapGestureRecognizer。我已经使用XIB添加KASlideShow以在几个间隔之后滑动三个图像。我的问题是，点击图像后我没有得到正确的索引。你可以帮我解决下面代码中我的错误：

UITapGestureRecognizer *tapGestureRecognizerInstruction = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTapOnView:)];
[tapGestureRecognizerInstruction setNumberOfTapsRequired:1];
tapGestureRecognizerInstruction.delegate = self;

slideshow.delegate = self;
[slideshow setDelay:1]; // Delay between transitions
[slideshow setTransitionDuration:.5]; // Transition duration
[slideshow setTransitionType:KASlideShowTransitionSlide];
[slideshow setImagesContentMode:UIViewContentModeScaleAspectFill];
[slideshow addGestureRecognizer:tapGestureRecognizerInstruction];

arraySlideShowImages = [[NSMutableArray alloc] initWithObjects:[UIImage imageNamed:@"1.jpg"], [UIImage imageNamed:@"2.jpg"], [UIImage imageNamed:@"3.jpg"],nil]; //array of images


for (int i=0; i<[arraySlideShowImages count]; i++) {

slideshow.tag = i;
[slideshow addImage:[arraySlideShowImages objectAtIndex:i]];

}

[slideshow start];


-(void)handleTapOnView:(id)sender
{
    UIGestureRecognizer *recognizer = (UIGestureRecognizer*)sender;
    KASlideShow * slideshow1 = (KASlideShow *)recognizer.view;

    NSLog(@"slide show tag is = %ld", (long)slideshow1.tag);    
}

每次我得到＆＃34;幻灯片放映标签是＆＃34; 2，我想以全屏显示特定的所选图像。请建议我达到正确的标签。

谢谢！

Answer 1

您获得了正确的标签。

标记应该是2，因为你的arraySlideShowImages计数是3，你在for循环中写了slideshow.tag = i;。标签将被修改三次为0,1,2。

如果您希望根据图像将其更改为0,1和2，则必须将标记设置为addImage方法内的图像视图。还要确保使用1而不是0的tag属性。所以将你的标签设置为i + 1.

for (int i=0; i<[arraySlideShowImages count]; i++) 
{
   [slideshow addImage:[arraySlideShowImages objectAtIndex:i] Index:i+1];
}

//modify your addImage method
- (void)addImage:(UIImage *)image Index:(int)itemIndex
{
  //your image view tag as itemIndex
}

-(void)handleTapOnView:(id)sender
{
    UITapGestureRecognizer *recognizer = (UITapGestureRecognizer *)sender;

    UIImageView* clickedImageView = [recognizer.view isKindOfClass:[UIImageView class]]?(UIImageView *)recognizer.view:nil;

    NSLog(@"clickedImageView tag is = %d", clickedImageView.tag);    
}

Answer 2

一个。设置标记

for(int i=0; i<[arraySlideShowImages count]; i++) 
{
[slideshow addImage:[arraySlideShowImages objectAtIndex:i] Index:i+1];
}

//modify your addImage method
- (void)addImage:(UIImage *)image Index:(int)itemIndex
 {
 //your image view tag as itemIndex
 }

1.在KASlideShow.h类中添加一个方法

@protocol KASlideShowDelegate <NSObject>

- (void)kaSlideShowSingleTap:(KASlideShow *) slideShow;

并在KASlideShow.m类的方法handleSingleTap中添加以下代码

if([self.delegaterespondsToSelector:@selector(kaSlideShowSingleTap:)])
[self.delegate   kaSlideShowSingleTap:self];

并在View控制器中调用Delegate方法（您想要获取标签的位置）

- (void)kaSlideShowSingleTap:(KASlideShow *) slideShow
{
NSLog(@"kaSlideShowSingleTap, index : %@",@(slideShow.currentIndex));          }

在iOS中使用UITapGestureRecogniser获取不正确的标记

2 个答案: