blocks|key|2845043|text|基本上是这样的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2845044|CGAffineTransform+rotateTransform+=+CGAffineTransformMakeRotation(M_PI+/+2.0);+[myCALayer+setAffineTransform:rotateTransform];|offset|length|style|CODE|2845045|编辑:它将顺时针或逆时针旋转取决于平台(iOS或Mac+)。|2845046|entityMap^0|0|0|3I|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Basically something like that:

<code>CGAffineTransform rotateTransform = CGAffineTransformMakeRotation(M_PI / 2.0);
[myCALayer setAffineTransform:rotateTransform];</code>

EDIT: It'll rotate clockwise or counter-clockwise depending on the platform (iOS or Mac OS).

blocks|key|2889449|text|Obj-C：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2889450|theLayer.transform+=+CATransform3DMakeRotation(90.0+/+180.0+*+M_PI,+0.0,+0.0,+1.0);|code-block|syntax|javascript|2889451|斯威夫特|2889452|theLayer.transform+=+CATransform3DMakeRotation(90.0+/+180.0+*+.pi,+0.0,+0.0,+1.0)|2889453|也就是说，转换层，使其旋转90度(π/2弧度)，其中100%25的旋转发生在z轴上。|2889454|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Obj-C:

<pre><code>theLayer.transform = CATransform3DMakeRotation(90.0 / 180.0 * M_PI, 0.0, 0.0, 1.0);
</code></pre>

Swift:

<pre><code>theLayer.transform = CATransform3DMakeRotation(90.0 / 180.0 * .pi, 0.0, 0.0, 1.0)
</code></pre>

That is, transform the layer such that it is rotated by 90 degrees (π / 2 radians), with 100% of that rotation taking place around the z-axis.

blocks|key|2889504|text|如果我要给它动画，我会在我的应用程序中使用这样的东西：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2889505|-+(NSObject+*)+defineZRotation+{
++++//+Define+rotation+on+z+axis
++++float+degreesVariance+=+90;
++++//+object+will+always+take+shortest+path,+so+that
++++//+a+rotation+of+less+than+180+deg+will+move+clockwise,+and+more+than+will+move+counterclockwise
++++float+radiansToRotate+=+DegreesToRadians(+degreesVariance+);
++++CATransform3D+zRotation;
++++zRotation+=+CATransform3DMakeRotation(radiansToRotate,+0,+0,+1.0);++
++++//+create+an+animation+to+hold+"zRotation"+transform
++++CABasicAnimation+*animateZRotation;
++++animateZRotation+=+[CABasicAnimation+animationWithKeyPath:@"transform"];
++++//+Assign+"zRotation"+to+animation
++++animateZRotation.toValue+=+[NSValue+valueWithCATransform3D:zRotation];
++++//+Duration,+repeat+count,+etc
++++animateZRotation.duration+=+1.5;//change+this+depending+on+your+animation+needs
++++//+Here+set+cumulative,+repeatCount,+kCAFillMode,+and+others+found+in
++++//+the+CABasicAnimation+Class+Reference.
++++return+animateZRotation;
}|code-block|syntax|javascript|2889506|当然，您可以在任何地方使用它，如果方法不适合您的需要，就不必从方法中返回它。|2889507|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If I'm animating it I use something like this in my apps:

<pre><code>- (NSObject *) defineZRotation {
 // Define rotation on z axis
 float degreesVariance = 90;
 // object will always take shortest path, so that
 // a rotation of less than 180 deg will move clockwise, and more than will move counterclockwise
 float radiansToRotate = DegreesToRadians( degreesVariance );
 CATransform3D zRotation;
 zRotation = CATransform3DMakeRotation(radiansToRotate, 0, 0, 1.0); 
 // create an animation to hold "zRotation" transform
 CABasicAnimation *animateZRotation;
 animateZRotation = [CABasicAnimation animationWithKeyPath:@"transform"];
 // Assign "zRotation" to animation
 animateZRotation.toValue = [NSValue valueWithCATransform3D:zRotation];
 // Duration, repeat count, etc
 animateZRotation.duration = 1.5;//change this depending on your animation needs
 // Here set cumulative, repeatCount, kCAFillMode, and others found in
 // the CABasicAnimation Class Reference.
 return animateZRotation;
}
</code></pre>

Of course you can use it anywhere, don;t have to return it from a method if that doesn;t suit your needs.

blocks|key|2845159|text|向右旋转90‘：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2845160|myView.transform+=+CGAffineTransformMakeRotation(M_PI_2);|code-block|syntax|javascript|2845161|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To rotate 90' right:

<pre><code>myView.transform = CGAffineTransformMakeRotation(M_PI_2);
</code></pre>

blocks|key|1392181|text|Rab展示了如何使用CAAnimation对象来实现它。它实际上比这更简单：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1392182|[myView+animateWithDuration:+0.25+
++animations:
++%5E{
+++++myView.transform+=+CGAffineTransformMakeRotation(M_PI/2);
+++}
];|code-block|syntax|javascript|1392183|(将转换行从Chris的答案中删除--因为他已经提供了完美的代码，所以懒得重写它。)|BOLD|1392184|克里斯的代码会在没有动画的情况下旋转视图。我上面的代码将对动画做同样的事情。|1392185|默认情况下，动画使用轻松，放松时间。您可以用稍微复杂一些的animateWithDuration调用来改变这一点(相反，使用animateWithDuration:delay:options:animations:completion:，并在options参数中传递所需的时间)。|1392186|entityMap^0|A|B|0|0|6|8|0|0|4|0|T|J|1Q|1K|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|W|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|X|8|@$9|Y|A|Z|B|M]]|D|@]|E|$]]|$1|N|3|O|5|6|7|10|8|@$9|11|A|12|B|M]]|D|@]|E|$]]|$1|P|3|Q|5|6|7|13|8|@$9|14|A|15|B|C]|$9|16|A|17|B|C]]|D|@]|E|$]]|$1|R|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|S|$]]

Rab showed how do do it with a <code>CAAnimation</code> object. Its actually simpler than that:

<pre><code>[myView animateWithDuration: 0.25 
 animations:
 ^{
 myView.transform = CGAffineTransformMakeRotation(M_PI/2);
 }
];
</code></pre>

(lifting the transform line from Chris's answer - too lazy to rewrite it since he already provided the perfect code.)

Chris's code would rotate the view without animation. My code above will do the same thing with animation.

By default, animations use ease in, ease out timing. You can change that with a slightly more complex version of the <code>animateWithDuration</code> call (Use <code>animateWithDuration:delay:options:animations:completion:</code> instead, and pass in a the desired timing in the options parameter.)

How do I rotate a CALayer 90 degrees? I need to rotate everything include sublayers and the coordinate system.

Rotating a CALayer 90 degrees?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何旋转CALayer 90度？我需要旋转一切，包括子层和坐标系。

问旋转CALayer 90度？
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