Question

我一直在谷歌搜索并搜索堆栈溢出，但有什么办法可以找出像素是什么点？比如，是否有一些应用程序可以确定您的指向说，（321,199）？

虽然我在这里，在CoCos2d中，我使用的是iPhone 5.0模拟器，所以我假设它有视网膜显示。然而，当我告诉CoCos2d将精灵放置在（516,724）时，我不得不将其降低到320x480的测量值。我以为视网膜是640x960。

Answer 1

就像UIKit一样，cocos可让您通过使用“积分”轻松处理这两种分辨率。

非视网膜显示中的一个点是一个像素，但在视网膜显示器上，它是两个像素宽，两个像素高。

因此，即使在视网膜设备上工作，您也可以使用320x480点的网格。

Answer 2

是的，我刚刚制作了一个完全符合此标准的示例应用

HelloWorld.m

//
//  HelloWorldLayer.m
//  FindCocosCoord
//

#import "HelloWorldLayer.h"

CCLabelTTF *touchLabelX;
CCLabelTTF *touchLabelY;
CCSprite *touchSprite;

@implementation HelloWorldLayer

+(CCScene *) scene
{
    // 'scene' is an autorelease object.
    CCScene *scene = [CCScene node];

    // 'layer' is an autorelease object.
    HelloWorldLayer *layer = [HelloWorldLayer node];

    // add layer as a child to scene
    [scene addChild: layer];

    // return the scene
    return scene;
}

-(id) init
{
    if( (self=[super init])) {
        self.isTouchEnabled = YES;
        touchLabelX = [CCLabelTTF labelWithString:@"X = " fontName:@"Marker Felt" fontSize:20];
        touchLabelX.position = ccp(100,50);
        [self addChild:touchLabelX];

        touchLabelY = [CCLabelTTF labelWithString:@"Y = " fontName:@"Marker Felt" fontSize:20];
        touchLabelY.position = ccp(170,50);
        [self addChild:touchLabelY];

        touchSprite = [CCSprite spriteWithFile:@"Icon-Small.png"];
        touchSprite.position = ccp(0,0);
        [self addChild:touchSprite];
    }
    return self;
}

-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch* myTouch = [touches anyObject];
    CGPoint location = [myTouch locationInView: [myTouch view]];
    location = [[CCDirector sharedDirector]convertToUI:location];

    touchSprite.position = location;

    touchX = touchSprite.position.x;
    touchY = touchSprite.position.y;

    NSLog(@"Location X = %i", (int)touchX);
    NSLog(@"Location Y = %i", (int)touchY);

    NSString *touchXstring = [NSString stringWithFormat:@"X = %i", (int)touchX];
    NSString *touchYstring = [NSString stringWithFormat:@"Y = %i", (int)touchY];

    [touchLabelX setString:touchXstring];
    [touchLabelY setString:touchYstring];

}

- (void) dealloc
{
    [super dealloc];
}
@end

HelloWorld.h

#import "cocos2d.h"

@interface HelloWorldLayer : CCLayer
{
    int touchX,touchY;
}

+(CCScene *) scene;

@end

CoCos2d像素和定位

2 个答案: