Question

I ve sub UIView as a avatar-object, which contained an icon (UIImageView), name (UILabel) and ID (UILabel). 根据方向X,Y坐标,我想轮到会。例如,指方向。 X = 1和取向。 Y = 1可分45度。 X和Y可能在-1至1之间有任何区别。

我不敢确定如何用数学计算,也不需要可可豆。有什么想法可以开始?

Answer 1

for for

- (void)rotateView:(UIView *)view withDuration:(NSTimeInterval)duration andRadians:(CGFloat)radians
{
    // Setup the animation
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:duration];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
    [UIView setAnimationBeginsFromCurrentState:YES];

    // The transform matrix
    CGAffineTransform transform = CGAffineTransformMakeRotation(radians);
    view.transform = transform;

    // Commit the changes
    [UIView commitAnimations];

}

EDIT:

for other angles you need to create your own rotation matrix.

轮值如何运作

Read here how to create a custom affine transformation in Objective-c

Hope this helps.

Answer 2

你们需要看三管功能——特别是<条码>/条码>和<条码>。

本条可有所帮助。

友情链接