iphone - 为什么我的水龙头没有被识别？

我创建了一个带有包含 ImageView 的 nib 的小型示例项目。在我的 View Controller 代码中，我在 ImageView 中添加了一个手势识别器来检测点击。但它从不调用处理程序方法。

这是标题:

#import <UIKit/UIKit.h>

@interface TapExperimentViewController : UIViewController {
    UIImageView *imageView;
}

@property (retain) IBOutlet UIImageView *imageView;

- (void)handleTapUIGestureRecognizer *)sender;

@end

这是实现文件:

#import "TapExperimentViewController.h"

@implementation TapExperimentViewController

@synthesize imageView;

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

- (void)viewDidLoad {
    [super viewDidLoad];
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]
                                   initWithTarget:self
                                   actionselector(handleTap];
    [self.imageView addGestureRecognizer:tap];
    [tap release];
}

- (void)viewDidUnload {
    [super viewDidUnload];
    self.imageView = nil;
}

- (void)handleTapUIGestureRecognizer *)sender {
    if (sender.state == UIGestureRecognizerStateEnded) {
        NSLog(@"tap");
    }
}

@end

我已确定 socket 已连接。为什么我触摸图像时不调用handleTap:？

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Best Answer-推荐答案

我自己没有使用过手势，但我知道 UIImageView s 默认不启用用户交互。

New image view objects are configured to disregard user events by default. If you want to handle events in a custom subclass of UIImageView, you must explicitly change the value of the userInteractionEnabled property to YES after initializing the object.

关于iphone - 为什么我的水龙头没有被识别？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5557411/