[英]CATextLayer rotate?
This should really work, but is not: 这应该真的有效,但不是:
CATextLayer* textLayer = [CATextLayer layer];
textLayer.string = @"text";
[textLayer setValue:[NSNumber numberWithDouble:M_PI / 2.f forKey:@"transform.rotation"];
[self addSublayer:textLayer];
in fact, when i print the value at transform.rotation, it shows the correct answer. 事实上,当我在transform.rotation上打印值时,它会显示正确的答案。 it just doesn't draw the textLayer rotated!
它只是没有绘制textLayer旋转!
NSLog(@"rotation %@", [textLayer valueForKey:@"transform.rotation"]);
What am I doing wrong? 我究竟做错了什么?
Try the following code: 请尝试以下代码:
textLayer.transform = CATransform3DMakeAffineTransform(CGAffineTransformMakeRotation(M_PI_2));
instead of: 代替:
[textLayer setValue:[NSNumber numberWithDouble:M_PI / 2.f forKey:@"transform.rotation"];
The CALayer will remember any value you give it. CALayer会记住你给它的任何价值。 I believe what you have it wrong because you need to rotate with "transform.rotation.z".
我相信你错了,因为你需要用“transform.rotation.z”旋转。
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