[英]curve Animation direction of rotation?
在我的應用程序中,我使用以下動畫使UIElement沿順時針方向沿着圓路徑移動
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
是將角度轉換為弧度的函數(只需返回M_PI *(angle / 180)的值)
但是問題是UIElement沿逆時針方向旋轉。 我找不到我的代碼中的錯誤,請幫幫我。
CGPathAddArc(path,NULL,viewFormsUI.center.x,viewFormsUI.center.y,88,radianOf(243),radianOf(0), YES );
嘗試將YES更改為NO
CGPathAddArc(path,NULL,viewFormsUI.center.x,viewFormsUI.center.y,88,radianOf(243),radianOf(0), NO );
這是-順時針布爾
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