使用UIRotationGestureRecognizer以固定角度（任意方向）旋转UIView？

Question

Guyz ...我stucked有一个愚蠢的问题...

我可以用UIRotationGestureRecognizer旋转，我UIView而只是希望有固定角度旋转它（为说45度），在任何方向上考虑的阈值（recognizer.rotation）。

请帮我...在此先感谢....

:)

Answer 1

这段代码对我的作品

-(void)doAction:(UIRotationGestureRecognizer *)recognizer { 
    if ([recognizer state] == UIGestureRecognizerStateEnded){ 

    float RotationinDegrees = recognizer.rotation * (180/M_PI); 
    NSLog(@"Rotation %f",RotationinDegrees); 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:.3]; 
    if (RotationinDegrees>thresholdValue) { 
     self.transform = CGAffineTransformRotate([self transform], DEGREES_TO_RADIANS(desiredangle)); 
    } 
    [UIView commitAnimations]; 
    [recognizer setRotation:0]; 
}  

}