UIView子类忽略第二触 [英] UIView subclass ignores second touch

问题描述

我正在制作一个iOS游戏，并且编写了一个UIView子类，该子类应该捕获触摸事件，并且可以按单次触摸的方式工作.但是，如果我已经用一根手指触摸了屏幕，然后在另一处用另一根手指触摸了屏幕，则第二次触摸不会调用"touchesBegan".

I'm making an iOS game, and I've written a UIView subclass that's supposed to catch touch events, and it works as intended for a single touch. However, if I'm already touching the screen with one finger then touch it with a second finger elsewhere, "touchesBegan" doesn't get called for the second touch.

这是该类的实现:(Objective-C ++)

Here's the implementation of the class: (Objective-C++)

#import "BATouchInput.h"

#include "BotsApp.h"

@implementation BATouchInput

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    for (UITouch* touch in touches) {
        std::cout << "touch started" << std::endl;
        BotsApp::getSingletonPtr()->touchDown(touch);
    }
    std::cout << "--------------" << std::endl;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    std::cout << [touches count] << std::endl;
    for (UITouch* touch in touches) {
        BotsApp::getSingletonPtr()->touchMoved(touch);
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    for (UITouch* touch in touches) {
        BotsApp::getSingletonPtr()->touchUp(touch);
    }
}

@end

我正在通过以下代码创建此类的实例:

I'm creating an instance of this class through this code:

BATouchInput * touchRecieverView = [[BATouchInput alloc] initWithFrame: [[UIScreen mainScreen] applicationFrame]];
        [[[UIApplication sharedApplication] keyWindow] addSubview: touchRecieverView];

推荐答案

您可能需要设置

You may need to set the value of multipleTouchEnabled property of your view to YES (the default value of this property is NO).

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