小编arv*_*abi的帖子

我是法国人,请原谅我的英语.所以我使用加速度计,但在我的代码中,加速度计适用于视图而不适用于图像.我想要做的是将此加速度计用于图像而不是视图.我怎样才能做到这一点？这是代码:

#define CONST_fps 100.
#define CONST_map_shift 0.01
#define kFilteringFactor 0.1
UIAccelerationValue rollingX, rollingY, rollingZ;

@implementation MapViewRotationViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    // accelerometer settings
    [[UIAccelerometer sharedAccelerometer] setDelegate:self];
    [[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / CONST_fps)];
}

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
    rollingX = (acceleration.x * kFilteringFactor) + (rollingX * (1.0 - kFilteringFactor));

    rollingY = (acceleration.y * kFilteringFactor) + (rollingY * (1.0 - kFilteringFactor));

    rollingZ = (acceleration.z * kFilteringFactor) + (rollingZ * (1.0 - kFilteringFactor));

    float accelX = acceleration.x - rollingX;
    float accelY …

大家好我是法国人因为我的英语而烦恼我这里是我的问题:我们如何定义视图的高度和宽度.这里它的名字是flakeView.这是代码:

UIImageView* flakeView = [[[UIImageView alloc] initWithImage:flakeImage] autorelease];

// use the random() function to randomize up our flake attributes
int startY = round(random() % 320);

// set the flake start position
flakeView.center = CGPointMake(490, startY);
flakeView.alpha = 1;

// put the flake in our main view
[self.view addSubview:flakeView];

[UIView animateWithDuration:7
                 animations:^{
                     // set the postion where flake will move to
                     flakeView.center = viewToRotate.center;
                 }];

我想每隔10秒调用一个方法,但我想使用NSTimer之外的其他方法.我可以用它做什么？

我有一个计数器,counter++每次一个图像接触另一个图像.

现在我想做的是:if counter=2; do something,但我总是得到一个错误:

赋值从整数中生成指针而不进行强制转换

这是代码的一部分:

-(void)checkcollision {
    if(CGRectIntersectsRect(flakeImage.frame, viewToRotate.frame)) {
       counter++;
    }
}

-(void)checknumber {
    if(counter=2) {
        viewToRotate.alpha=0;
    }
}