xcode如何定义视图的高度和宽度

Question

大家好，我是法国人，所以请原谅我的英语，所以这是我的问题：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;
                 }];

Answer 1

CGRect frame = CGRectMake(xPosition, yPosition, width, height);
flakeView.frame = frame;

请注意，xPosition 和 yPosition 是左上角，而不是中心。