[英]Detect tap on UIImageView IOS
难道我做错了什么? 我无法检测到UIImageview
上的点UIImageview
。 UIImageView *myImage
是在storyboard中创建的。 代码文件位于: 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
我认为你应该使用类UITapGestureRecognizer作为:
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");
}
您只需将.h文件更改为
#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tapgestureRecognizer连接到委托。您只需尝试此代码
即使您通过代码启用它,尝试转到您的故事板检查图像视图上的“启用用户交互”,您的代码似乎很好,尝试并让我知道。
另外,只是想一想,在分配tapgesture之前尝试在imageview上启用交互:)
UIGestureRecognizer *sliderTapview1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedImage:)];
[img addGestureRecognizer:sliderTapview1];
img.userInteractionEnabled = YES;
只是替换它。
看起来每件事情都很好尝试这样做[myImage userInteractionEnabled:YES]并在图像视图的界面构建器中删除“自动布局”和“启用用户交互”。
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