显示 CGRect 边框的简单方法? [英] Simple way to display the borders of a CGRect?

问题描述

我正在尝试寻找一种方法来在我的 iOS 程序中显示某些 CGRect 的边框以进行调试.有没有一种相当简单的方法来做到这一点?我只需要查看程序在哪里创建这些矩形，这样我就可以追踪一些奇怪的触摸行为(或缺少这些行为).

I'm trying to find a way to display the borders of some CGRects in my iOS program for debugging purposes. Is there a fairly simple way to do this? I just need to see where the program is creating these rectangles, so I can track down some odd touch behaviors (or lack thereof).

我的类init方法:

// Initialize with points and a line number, then draw a rectangle 
// in the shape of the line
-(id)initWithPoint:(CGPoint)sP :(int)w :(int)h :(int)lN :(int)t {
    if ((self = [super init])) {
        startP = sP;
        lineNum = lN;
        width = w;
        height = h;
        int type = t;
        self.gameObjectType = kPathType;

        // Draw the path sprite
        path = [CCSprite spriteWithFile: @"line.png" rect:CGRectMake(0, 0, 5, height)];
        ccTexParams params = {GL_LINEAR,GL_LINEAR,GL_REPEAT,GL_REPEAT};
        [path.texture setTexParameters:&params];

        if(type == 1) {
            path.position = ccp(startP.x, startP.y);
        } else {
            path.rotation = 90;
            path.anchorPoint = ccp(0, 0);
            path.position = ccp(startP.x, startP.y-2);
        }

        [self addChild:path];

        // Draw the "bounding" box
        pathBox = CGRectMake(path.position.x - (path.contentSize.width/2), path.position.y - (path.contentSize.height/2), path.contentSize.width * 10, path.contentSize.height);
    }
    return self;
}

pathBox 是有问题的矩形.

推荐答案

我或多或少地想出了怎么做:只是像这样在我的类中扩展了 draw 方法:

I figured out more-or-less how to do it: just extended the draw method in my class like so:

-(void) draw {
    glColor4f(0, 1.0, 0, 1.0);
    glLineWidth(2.0f);
    [super draw];

    CGRect pathBox = CGRectMake(path.position.x - (path.contentSize.width/2), path.position.y - (path.contentSize.height/2), path.contentSize.width * 10, path.contentSize.height);
    CGPoint verts[4] = {
      ccp(pathBox.origin.x, pathBox.origin.y),
      ccp(pathBox.origin.x + pathBox.size.width, pathBox.origin.y),
      ccp(pathBox.origin.x + pathBox.size.width, pathBox.origin.y + pathBox.size.height),
      ccp(pathBox.origin.x, pathBox.origin.y + pathBox.size.height)
    };

    ccDrawPoly(verts, 4, YES);
}

感谢 Cocos2D 网站上的 Blue Ether 的提醒:http://www.cocos2d-iphone.org/forum/topic/21718?replies=5#post-120691

Thanks to Blue Ether over at the Cocos2D site for the heads-up: http://www.cocos2d-iphone.org/forum/topic/21718?replies=5#post-120691

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