iOS5.0中animation.timingFunction = UIViewAnimationCurveEaseInOut发送错误

在调试CATransition动画中发现animation.timingFunction = UIViewAnimationCurveEaseInOut；有错误提示：implict conversion of ‘int’ to ‘CAMediatimingFunction’ is disallowed with ARC。估计是因iOS5.0中在项目中使用了ARC，对以前的这种使用不再支持了。

修改为：

animation.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];