UIPinchGestureRecognizer - 禁止“关闭夹点”检测

问题描述

我正在使用UIPinchRecognizer和一个打开的夹子来检测当有人在Box2D世界中分割sprite时。

问题是，当你拖动两个项目朝向彼此，它检测这是一个关闭捏和打破所有我的touchjoints和box2d对象的运动。

我试图把我的问题分成两个问题 - 您现在正在阅读的问题：是否可以抑制关闭捏，如果这是不可能的：如何检测

我需要抑制关闭夹点的检测，或者编写自己的打开夹点检测。

我试着从pinch手势方法返回一个打开的pinch像这样：

  if（pinch.velocity < 0）{
 // close pinch 
 return; 
} 
  

但它不工作，因为它仍然断开touch关节/ box2d对象。

您能帮我解决这个问题吗？

解决方案

我需要在设备上检查这个，但我认为这已经修复了：

  // Multitouch / pinch？ 
 UIPinchGestureRecognizer * pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget：self action：@selector（pinchGesture :)]; 
 pinchRecognizer.cancelsTouchesInView = NO; //这解决了它，因为它阻止鼠标关节坏了。 
 
 [[[CCDirector sharedDirector] openGLView] addGestureRecognizer：pinchRecognizer]; 
 [UIPinchGestureRecognizer release]; 
  
 
 
 <$> 
 p $ p>  if（pinch.velocity< 0）{
 return; 
} 
  

I'm using the UIPinchRecognizer and an open pinch to detect when someone 'pulls apart' a sprite in a Box2D world.

The problem is that when you drag two items toward each other it detects this as a close pinch and breaks all my touchjoints and the movement of the box2d objects.

I've tried to split my problem into two questions - the question you're reading now: is it is possible to suppress the close pinch, and if that's not possible: how to detect an open pinch myself.

I need to either suppress the detection of close pinches or write my own open pinch detection.

I tried returning from the pinch gesture method on an open pinch like this:

if (pinch.velocity < 0) {
    //close pinch
    return;
}

but it doesn't work because it still breaks the touch joints / box2d objects.

Could you help me solve this problem by suppressing the detection of close pinches?

解决方案

I need to check this on a device, but I think that this has fixed it:

//Multitouch / pinch?
UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)];
pinchRecognizer.cancelsTouchesInView = NO; //This fixes it because it stops the mouse joints getting broken. 

[[[CCDirector sharedDirector] openGLView] addGestureRecognizer:pinchRecognizer];
[UIPinchGestureRecognizer release];

with this in the pinchGesture method:

if(pinch.velocity <0 ){
    return;
}

这篇关于UIPinchGestureRecognizer - 禁止“关闭夹点”检测的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！