检测UIImageView上的轻击手势 IOS

Question

我做错了什么？我无法检测到UIImageview上的点击。 UIImageView *myImage 在Storyboard中创建。代码文件在这里：https://drive.google.com/folderview?id=0B2jWw-2wZC52NDBFZ2lXUTUzQXM&usp=sharing 文件：ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (strong, nonatomic) IBOutlet UIImageView *myImage;

@end

文件：ViewController.m

#import "ViewController.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    UIGestureRecognizer *tapGestureRecognizer = [[UIGestureRecognizer alloc] initWithTarget:self action:@selector(tappedImage:)];
    [self.myImage addGestureRecognizer:tapGestureRecognizer];
    self.myImage.userInteractionEnabled = YES; // default is no for UIImageView

}

- (void)tappedImage:(UIGestureRecognizer *)gestureRecognizer {
    //UIImageView *myImage = (UIImageView *)gestureRecognizer.view;
    // do stuff;
    NSLog(@"it works");
}


@end

- user1172579

---

我通过将UIGestureRecognizer替换为UITapGestureRecognizer来解决了它！谢谢大家！ - user1172579

Answer 1

我认为你应该使用UITapGestureRecognizer类，如下所示：

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected)];
singleTap.numberOfTapsRequired = 1;
preArrowImage.userInteractionEnabled = YES;
[preArrowImage addGestureRecognizer:singleTap];

-(void)tapDetected{
NSLog(@"single Tap on imageview");

}

- A J

Answer 2

您只需更改.h文件即可。

 #import <UIKit/UIKit.h>

 @interface ViewController : UIViewController<UIGestureRecognizerDelegate>

@property (strong, nonatomic) IBOutlet UIImageView *myImage;

@end

然后是 .m 文件。

 #import "ViewController.h"
 @interface ViewController ()

 @end

 @implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

UIGestureRecognizer *tapGestureRecognizer = [[UIGestureRecognizer alloc] initWithTarget:self action:@selector(tappedImage:)];
tapgestureRecognizer.delegate = self;
[self.myImage addGestureRecognizer:tapGestureRecognizer];
self.myImage.userInteractionEnabled = YES; // default is no for UIImageView

}

 - (void)tappedImage:(UIGestureRecognizer *)gestureRecognizer {
//UIImageView *myImage = (UIImageView *)gestureRecognizer.view;
// do stuff;
NSLog(@"it works");
 }


@end

我将连接tapgestureRecognizer到代理。你只需要尝试这段代码。

- Albin Joseph

---

亲爱的Albin，你的方法不起作用。也许你可以尝试下载我的代码。请在这里找到它：https://drive.google.com/folderview?id=0B2jWw-2wZC52NDBFZ2lXUTUzQXM&usp=sharing - user1172579

Answer 3

 UIGestureRecognizer *sliderTapview1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedImage:)];
    [img addGestureRecognizer:sliderTapview1];

   img.userInteractionEnabled = YES;

只需替换这部分内容。

- Hitendra

Answer 4

即使您在代码中启用了它，请尝试进入您的Storyboard并检查图像视图上的“启用用户交互”，您的代码似乎没问题，尝试这样做并告诉我。

另外，想到一点，尝试在分配tapgesture之前启用imageview上的交互 :)

- Nour Helmi

Answer 5

看起来一切都很好，尝试像这样做：[myImage userInteractionEnabled:YES]，并在图像视图中的界面构建器中删除“自动布局”和“启用用户交互”。

- yashwanth77

---

亲爱的Yashwanth，按照您的建议，结果相同。请在此处找到代码：https://drive.google.com/folderview?id=0B2jWw-2wZC52NDBFZ2lXUTUzQXM&usp=sharing - user1172579