Question

这是我的代码：

int i = 0;
self.userInteractionEnabled = YES;
self.exclusiveTouch = YES;


self.canCancelContentTouches = YES;
self.delaysContentTouches = YES;
self.translatesAutoresizingMaskIntoConstraints = YES;
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc]        initWithTarget:self action:@selector(gototest)];
tapGestureRecognizer.numberOfTapsRequired = 1;
[self addGestureRecognizer:tapGestureRecognizer];
for (NSString *message in self.messages) {
    UILabel * label = [[UILabel alloc] initWithFrame:CGRectZero];
    self.userInteractionEnabled = YES;
    label.text = message;
    label.tag = i;
    CGSize size = [message sizeWithFont:label.font];
    CGFloat width = size.width + kPADDING;
    label.frame = CGRectMake(xPos, 0.0, width, self.frame.size.height);
    [self addSubview:label];

    i++;

    xPos += width;
    NSLog(@"%@",NSStringFromCGRect(label.frame));
}
self.messagesWidth = xPos;
self.contentSize = CGSizeMake(xPos, self.frame.size.height);
self.contentOffset = CGPointMake(-self.frame.size.width, 0.0);

}

-(void)gototest
{
NSLog(@"test %@",@"ccc ");
}

然后为选框 - （无效）去{

if (!self.period) self.period = self.messagesWidth / 100;
// so it always takes about the same (fudged, but reasonable) amount of time to scroll    the whole array

[UIView animateWithDuration:self.period
                      delay:0.0
                    options:UIViewAnimationOptionCurveLinear  |UIViewAnimationOptionRepeat
                 animations:^{
                     self.contentOffset = CGPointMake(self.messagesWidth, 0.0);
                 } completion:^(BOOL finished){}];
 }

所以，我的目标是为新闻创建一个选框，每个新闻都可以点击，以查看所点击的新内容的详细信息。

但是UITapGestureRecognizer不起作用，我不知道为什么。

请注意，self是scrollview，因为我的类是从UIScrollView扩展的。

所以请帮帮我

Answer 1

您必须以下列方式继承UIScrollView。然后使用自定义滚动视图（即TouchScrollView）代替常规UIScrollView

<强> TouchScrollView.h：

#import <Foundation/Foundation.h>
@import UIKit;

@interface TouchScrollView : UIScrollView

@end

<强> TouchScrollView.m：

#import "TouchScrollView.h"

@implementation TouchScrollView

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // Respond to touch events here
    // ...


    [self.nextResponder touchesBegan:touches withEvent:event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    [self.nextResponder touchesMoved:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [self.nextResponder touchesEnded:touches withEvent:event];
}

@end

或者如果你想在Swift中这样做，因为它现在是时尚：

<强> TouchScrollView.swift

import Foundation
import UIKit

class TouchScrollView: UIScrollView {
    override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!) {
        // Respond to touch events here
        // ...
        nextResponder().touchesBegan(touches, withEvent: event)
    }

    override func touchesMoved(touches: NSSet!, withEvent event: UIEvent!) {
        nextResponder().touchesMoved(touches, withEvent: event)
    }

    override func touchesEnded(touches: NSSet!, withEvent event: UIEvent!) {
        nextResponder().touchesEnded(touches, withEvent: event)
    }
}

IOS scrollview无法点击

1 个答案: