如何在缩放状态下检测触摸动作是否触及精灵？

发布于 2024-09-08 03:11:17 字数 433 浏览 4 评论 0原文

首先，我将包含精灵的图层放大。现在我需要感知精灵上的触摸。我尝试如下，但无法达到目标-

CGRect tRect= [[aSprite displayedFrame] rect];
    if(CGRectContainsPoint(tRect, touchedPosition))
{
    NSLog(@"touched:>> touch at (%f,%f)",touchedPosition.x,touchedPosition.y);
    // Do something, maybe return kEventHandled;
}
else{
    NSLog(@"NOT touched: touch at (%f,%f)",touchedPosition.x,touchedPosition.y);
}

仅供参考：我使用了 cocos2d 框架

原文

First i have scaled the layer larger which contains the sprites.
Now I need to sense touch on a sprite.
I have tried as follows, but cant reach to goal-

CGRect tRect= [[aSprite displayedFrame] rect];
    if(CGRectContainsPoint(tRect, touchedPosition))
{
    NSLog(@"touched:>> touch at (%f,%f)",touchedPosition.x,touchedPosition.y);
    // Do something, maybe return kEventHandled;
}
else{
    NSLog(@"NOT touched: touch at (%f,%f)",touchedPosition.x,touchedPosition.y);
}

FYI: I have used cocos2d framework

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何其悲哀 2024-09-15 03:11:17

首先，您需要确保从 UITouch 正确获取位置。

CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];

其次，您需要测试您对精灵边界框的触摸。

if (CGRectContainsPoint([sprite boundingBox], location)) {
    // The sprite is being touched.
}

First, you need to make sure you get the location from the UITouch correctly.

CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];

Second, you need to test your touch against the sprite's bounding box.

if (CGRectContainsPoint([sprite boundingBox], location)) {
    // The sprite is being touched.
}

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伴我心暖 2024-09-15 03:11:17

弗兰克·米切尔是正确的。另一种方法是将您的监听代码添加到精灵本身，以便 Cocos 为您完成工作。如果实际被触摸，它只会发送精灵 ccTouchesBegan 事件。

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软糖 2024-09-15 03:11:17

最后我找到了解决方案:)，这里是代码

CGPoint location = [touch locationInView: [touch view]];
CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:location];

CGPoint tapPosition = [self convertToNodeSpace:convertedLocation];

，其中“self”是我之前指定的精灵持有者层。该层正在监听触摸事件。

At last I have found the solution :), here is the code

CGPoint location = [touch locationInView: [touch view]];
CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:location];

CGPoint tapPosition = [self convertToNodeSpace:convertedLocation];

where 'self' is the sprite holder layer as I have specified before. This layer is listening the touch event.

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