为什么我在不同的设备中获得不同的CGFloat价值

Question

Hi my CGFloat value shows different value according to device .

I am using cocos2d game for iPhone

I am trying to print dt value

In iPhone 5 it shows 0.0166666675

But in iPhone 6 it show 5.0176358830256065E-315

I am using this code

-(void)update:(CGFloat)dt {
static CGFloat time = 0;
time += dt;
 if (time >= 3) {
    [self unscheduleUpdate];
    time = 0;
    if ([self getChildByTag:999].visible)
    {
        [self hideGuide];
    }
} }

Answer 1

You got different results because CGFloat value is different for 32bit & 64bit devices,

typedef float CGFloat;// 32-bit
typedef double CGFloat;// 64-bit

I think this will help you