xcode TapGestureRecognizer 没有被调用

TapGestureRecognizer does not get called

提问by Alexidze

Hi in the main WiewController in the viewDidLoad i set up a

嗨，在 viewDidLoad 的主 WiewController 中，我设置了一个

UIGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(processTap)];

and then i a for loop i create UIViews and add them to a scroll view, that is then added to the main view.

然后 ia for 循环我创建 UIViews 并将它们添加到滚动视图，然后添加到主视图。

       UIView *newsContainer = [[UIView alloc] initWithFrame:CGRectMake(160 * countnews, 30, 156, 126)];
       newsContainer.tag = countnews;
       newsContainer.userInteractionEnabled = YES;
       [newsContainer addGestureRecognizer:recognizer];            
       [tempScroll addSubview:newsContainer];

then i have a function

然后我有一个功能

- (void)processTap:(UITapGestureRecognizer *)recognizer {
    UIView *view = recognizer.view;
    NSLog(@"HELLO, %d", view.tag);
}

Which never gets called, any suggestions? your help would be greatly appreciated. Thanks in advance.

哪个永远不会被调用，有什么建议吗？您的帮助将不胜感激。提前致谢。

here is the entire .m

这是整个 .m

#import "iPadMainViewController.h"
#import "GradeintView.h"
#import <QuartzCore/CALayer.h>
#import "Category.h"
#import "News.h"
#import "LazyImageView.h"
#import "TouchView.h"

@interface iPadMainViewController ()

@end

@implementation iPadMainViewController

@synthesize detailsView = _detailsView;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(processTap:)];
    [recognizer setDelegate:self];

    GradeintView *MainTitle = [[GradeintView alloc] initWithFrame:CGRectMake(0, 0, 1024, 50)];
    GradeintView *MainSubTitle = [[GradeintView alloc] initWithFrame:CGRectMake(0, 50, 1024, 30)];

    NSMutableArray *categoriesCollection = [[Category alloc] allCategoriesFromFeedAtUrl:@"http://geonews.ge/xml/category.php"];

    UIScrollView *categories = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 512, 768)];
    _detailsView = [[UIWebView alloc] initWithFrame:CGRectMake(500, 0, 512, 768)];
    [_detailsView addGestureRecognizer:recognizer];
    [categories setScrollEnabled:TRUE];
    [categories setContentSize:CGSizeMake(500, categoriesCollection.count * 156)];

    MainTitle.layer.masksToBounds = NO;
    MainTitle.layer.shadowOffset = CGSizeMake(3, 3);
    MainTitle.layer.shadowRadius = 5;
    MainTitle.layer.shadowOpacity = 0.3;

    [categories setBackgroundColor:[UIColor redColor]];

    int counter = 0;

    for (Category *cat in categoriesCollection)
    {
        UIView *categoryTitle = [[UIView alloc] initWithFrame:CGRectMake(0, 166 * counter
                                                                         , 500, 20)];

        UILabel *categoryLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 0, 200, 20)];

        [categoryLabel setBackgroundColor:[UIColor clearColor]];
        NSMutableArray *allCurrentNews = [[News alloc] allNewsFromCategory:cat.CategoryId];

        categoryLabel.text = cat.Name;
        categoryLabel.textColor = [UIColor whiteColor];

        [categoryTitle addSubview:categoryLabel];

        UIColor *myblack = [[UIColor alloc] initWithRed:0.14 green:0.14 blue:0.14 alpha:1];
        UIColor *ligheterBlac = [[UIColor alloc] initWithRed:0.227 green:0.22 blue:0.22 alpha:1];
        [categoryTitle setBackgroundColor:myblack];

        UIScrollView *tempScroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 166 * counter, 500, 166)];

        UIColor *tempcolor = ligheterBlac; 
        tempScroll.layer.borderColor = [UIColor colorWithRed:0.34 green:0.34 blue:0.34 alpha:1].CGColor;
        tempScroll.layer.borderWidth = 0.5f;
        int countnews = 0;

        for (News *news in allCurrentNews)
        {
            UIView *newsContainer = [[UIView alloc] initWithFrame:CGRectMake(160 * countnews, 30, 156, 126)];
            newsContainer.tag = countnews;
            [newsContainer addGestureRecognizer:recognizer];

            //newsContainer.NewsId = news.NewsId;
            LazyImageView *image = [[LazyImageView alloc] initWithURl:[NSURL URLWithString:news.Thumbnail]];
            image.frame = CGRectMake(0, 0 , 156, 96);
            UILabel *newsTitle = [[UILabel alloc] initWithFrame:CGRectMake(0, 96, 156, 30)];
            newsTitle.backgroundColor = myblack;
            newsTitle.numberOfLines = 2;
            newsTitle.font = [UIFont systemFontOfSize:11];
            newsTitle.text = news.Title;
            newsTitle.textColor = [UIColor whiteColor];
            newsTitle.textAlignment = UITextAlignmentCenter;

            newsContainer.layer.borderColor = [UIColor colorWithRed:0.34 green:0.34 blue:0.34 alpha:1].CGColor;
            newsContainer.layer.borderWidth = 0.5f;

            [newsContainer addSubview:image];
            [newsContainer addSubview:newsTitle];

            countnews ++;
            [tempScroll setContentSize:CGSizeMake(allCurrentNews.count * 156, 96)];
            [tempScroll addSubview:newsContainer];
           //[image release];
        }

        [tempScroll setBackgroundColor: tempcolor];

        [categories addSubview:tempScroll];
        [categories addSubview:categoryTitle];
        [tempcolor release];
        [tempScroll release];
        counter ++;
    }

    self.detailsView.layer.masksToBounds = NO;
    self.detailsView.layer.shadowOffset = CGSizeMake(-10, 5);
    self.detailsView.layer.shadowRadius = 5;
    self.detailsView.layer.shadowOpacity = 0.3;


    [self.detailsView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.amazon.com"]]];
    [self.view addSubview:categories];
    [self.view addSubview:self.detailsView];
    [self.view addSubview:MainSubTitle];
    [self.view addSubview:MainTitle];

}

- (void)processTap:(UITapGestureRecognizer *)recognizer {
    UIView *view = recognizer.view;
    NSLog(@"HELLO, %d", view.tag);
}

- (void)viewDidUnload
{
    [super viewDidUnload];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

- (void)dealloc {
    [super dealloc];
}

- (void)loadDetailedContent:(NSString *)s
{
}

@end

回答by beryllium

Change

改变

initWithTarget:self.view

to

到

initWithTarget:self

EDIT:
You also have forgotten colon:

编辑：
你也忘记了冒号：

initWithTarget:self action:@selector(processTap:)

EDIT2:
You have created _detailsView(with assigned UITapGestureRecognizer) but have not added it to any subview. How it will work?

EDIT2：
您已创建_detailsView（使用分配的 UITapGestureRecognizer）但尚未将其添加到任何子视图。它将如何运作？

回答by karstux

I think the problem is that the scrollView, which contains your views, has its own internal gesture recognizer that is "taking away" touch events from your tap gesture recognizer. Try implementing the following gesture recognizer delegate method:

我认为问题在于包含您的视图的 scrollView 具有自己的内部手势识别器，该识别器从您的点击手势识别器中“带走”触摸事件。尝试实现以下手势识别器委托方法：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}

回答by Vincent

Have you checked the Interaction setting? Interaction shall be set to "User Interaction Enabled" in the Attributes inspector for the image.

您是否检查了交互设置？交互应在图像的属性检查器中设置为“启用用户交互”。

回答by Ravi

try this code

试试这个代码

UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(processTap)];
[newsContainer addGestureRecognizer::gestureRecognizer];
 gestureRecognizer.cancelsTouchesInView = NO;

回答by Shmidt

Change @selector(processTap) to @selector(processTap:)

将@selector(processTap) 改为@selector(processTap:)

Because now you calling method that doesn't exist.

因为现在你调用了不存在的方法。

回答by Raj A.N.T. Gounder

I assume the problem is, you might have missed to add <UIGestureRecognizerDelegate>in the header file.

我认为问题是，您可能没有<UIGestureRecognizerDelegate>在头文件中添加。

回答by Banker Mittal

you can first add your gestureRecognizer to self.view and check your method called or not... as well check this thread
Issue with a UITapGestureRecognizer

您可以首先将您的gestureRecognizer 添加到self.view 并检查您的方法是否被调用......以及检查此线程
问题与UITapGestureRecognizer

回答by tipycalFlow

You're adding a UIGestureRecognizerto a UIWebview, which is not recommended. UIWebview has its ownUIGestureRecognizer`s which are tricky to over-ride. See this SO questionfor more info.

您将 a 添加UIGestureRecognizer到 a UIWebview，这是不推荐的。UIWebview has its ownUIGestureRecognizer 很难覆盖。有关更多信息，请参阅此SO 问题。