使用NSNumber初始化CATransition持续时间

Question

我想用CATransition初始化NSNumber的持续时间，我该怎么做，因为animation.duration是NSTimeInterval个对象？

- (void)startPopUpAnimation:(NSNumber *)numbers {

    CATransition *animation = [CATransition animation];
    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    animation.type = kCATransitionFade;
    animation.duration = @"2.15";//[NSNumber numberWithDouble:[numbers doubleValue]];

}

Answer 1

这比我想象的要容易：

animation.duration是typedef double，所以我刚刚做了：animation.duration = [numbers doubleValue];