旋转 UIView iPhone [英] Rotate UIView iPhone

问题描述

我正在开发一款益智游戏，我需要在每次双击时将拼图旋转到 90 度角.

I am working on a puzzle game and I need to rotate the puzzle pieces to 90 degrees angle on every double tap.

我尝试使用两种不同的方式来做.第一种方法是这个:

I have tried to do did using two different ways. First method is this one:

[UIView beginAnimations:@"rotate" context:nil];
[UIView setAnimationDuration:0.5];
self.transform = CGAffineTransformMakeRotation(90);
[UIView commitAnimations];

唯一的问题是这件作品没有旋转 90 度；它旋转了大约 100 度，并且这个动画正在修改拼图的框架 UIView.

The only problems with that are that the piece is NOT rotating 90 degrees; it is rotating by around 100 degrees, and that this animation is modifying the frame of the puzzle piece UIView.

这是我的控制台输出:

frame BEFORE ROTATION: {{35, 178}, {80, 80}}

frame AFTER ROTATION: {{21.3172, 164.317}, {107.366, 107.366}}

我尝试的第二种方法是这个:

The second method I tried was this one:

CABasicAnimation* spinAnimation = [CABasicAnimation
                                       animationWithKeyPath:@"transform.rotation"];
spinAnimation.toValue = [NSNumber numberWithFloat:1];
[self.layer addAnimation:spinAnimation forKey:@"spinAnimation"];

这个方法的问题在于，在完成旋转后，它会将我的 UIView 反转到之前的状态.

The problem with this method is that after finishing the rotation, it is reversing my UIView to its previous state.

如何在没有这些问题的情况下旋转带有动画的拼图?

How can I rotate the puzzle piece with an animation without having these problems?

推荐答案

尝试

[UIView beginAnimations:@"rotate" context:nil];
[UIView setAnimationDuration:0.5];
self.transform = CGAffineTransformMakeRotation(DegreesToRadians(90));
[UIView commitAnimations];

您可以在其中定义 DegreesToRadians 为

where you can define DegreesToRadians as

#define DegreesToRadians(x) ((x) * M_PI / 180.0)

这篇关于旋转 UIView iPhone的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！