如何使用变换旋转UIView? [英] How to rotate UIView using transform?

问题描述

我有一个 UIView ，我正尝试使用可以从coremotion姿态获得的俯仰值进行变换(旋转).我正在使用转换，但是我不确定我的代码是否正确，因为 UIView 没有执行任何操作.

I have a UIView which I am trying to transform (rotate) using the pitch value you can get from coremotion attitude. I am using transform however I am not sure my code is correct as the UIView is not doing anything.

这是我的代码，每秒被调用几次.

This is my code its being called several times per second.

- (void)setLabelValueRoll:(double)roll pitch:(double)pitch yaw:(double)yaw
{
    self.yLabel.text = [NSString stringWithFormat:@"pitch: %f", pitch];


    CATransform3D transform;
    transform = CATransform3DMakeRotation(pitch + M_PI_2, 1, 0, 0);
    self.wapaA.layer.sublayerTransform = transform;
}

我不确定如何设置此部分(间距+ M_PI_2、1、0、0)，以使间距影响我的正方形 UIView ，所以我猜来回倾斜手机时保持水平.

I am not sure how to set this part (pitch + M_PI_2, 1, 0, 0) to make the pitch affect my square UIView so it would I guess stay level as you tilt the phone back and forth.

推荐答案

它应该是 UIView

wapaA.layer.transform = CATransform3DMakeRotation(pitch + M_PI_2, 1, 0, 0); 

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