我想做的是:
- 单击按钮进行垂直翻转。
- 再次单击按钮,图层会将其翻转回来,依此类推...
代码如下:
@interface ViewController (){
CALayer *plane;
}
@end
@implementation ViewController
-(void)viewDidLoad
{
[super viewDidLoad];
[self addALayer];
}
- (void)addALayer{
plane = [CALayer layer];
plane.backgroundColor = [[UIColor orangeColor] CGColor];
//[plane insertSublayer:normalBackground atIndex:0];
plane.opacity = 1;
plane.frame = CGRectMake(0, 0, 300, 100);
plane.position = CGPointMake(250, 150);
plane.anchorPoint = CGPointMake(0.5, 0.5);
plane.borderColor = [UIColor whiteColor].CGColor;
plane.borderWidth = 3;
plane.cornerRadius = 10;
[self.view.layer addSublayer:plane];
}
- (IBAction)click:(id)sender {
BOOL isClicked = ((UIButton*)sender).selected;
((UIButton*)sender).selected = !((UIButton*)sender).selected;
CATransform3D transfrom = CATransform3DIdentity;
transfrom.m34 = -1.0/ 500;
if ( !isClicked )
transfrom = CATransform3DRotate(transfrom, degToRad(180.0), 1, 0, 0);
else
transfrom = CATransform3DRotate(transfrom, degToRad(-180.0), 1, 0, 0);
plane.transform = transfrom;
}
但是,在步骤 1 中,我可以看到图层翻转 180 度,当我再次单击按钮时,没有任何反应。
我是不是中间漏掉了什么?请帮忙。
最佳答案
下面的代码仅获取发件人的选定状态。并且状态只设置一次。检查下面修改后的代码。
// Have a global variable
BOOL isClicked
- (IBAction)click:(id)sender {
CATransform3D transfrom = CATransform3DIdentity;
transfrom.m34 = -1.0/ 500;
if ( !isClicked ) {
transfrom = CATransform3DRotate(transfrom, degToRad(180.0), 1, 0, 0);
isClicked = true;
}
else{
transfrom = CATransform3DRotate(transfrom, degToRad(360.0), 1, 0, 0); // OR CAN ALSO BE 0
isClicked = false;
}
plane.transform = transfrom;
}
关于ios - 无法再次翻转图层、CALayer、CATransform3D 旋转。,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15893144/