在我的应用程序中,我使用以下动画使我的UIElement沿顺时针方向的圆形路径
CGMutablePathRef path = CGPathCreateMutable();
CGPathAddArc(path, NULL,viewFormsUI.center.x,viewFormsUI.center.y,
88,radianOf(243),radianOf(0), YES); //viewFormsUI is an UIView
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
[animation setPath:path];
[animation setDuration:1];
animation.removedOnCompletion = YES;
animation.fillMode = kCAFillModeForwards;
[animation setAutoreverses:NO];
CFRelease(path);
[btnRefreshUI.layer addAnimation:animation forKey:@"curveAnimation"];
//btnRefreshUI is an UIButton
radianOf
是一个将角度转换为弧度的函数(只返回M_PI *的值(角度/ 180))
但问题是UIElement正在逆时针方向旋转。 我在代码中找不到错误,帮助我找到同行。
答案 0 :(得分:1)
CGPathAddArc(path,NULL,viewFormsUI.center.x,viewFormsUI.center.y,88,radianOf(243),radianOf(0), YES );
尝试将是更改为否
CGPathAddArc(path,NULL,viewFormsUI.center.x,viewFormsUI.center.y, 88,radianOf(243),radianOf(0), NO );
这是 - 顺时针方向布尔