方法“ animatedWithDuration（）”缺少参数“延迟”的参数

Question

为了在Swift应用程序中添加一个类似于“存折菜单”的菜单，我从Github找到了一个用Objective-C编写的适当演示。 然后我将ObjC顺利翻译成Swift，直到在原始演示中找到了两个Block。 在我检查了一些指导书之后，我才知道应该将Block转换为Closure。

我尝试了，但失败了。 编译器抛出“ animatedWithDuration（）缺少参数'delay'的参数”的故障

1. 首先，我需要声明我没有选择animatedWithDuration（）具有参数“ delay”的方法。
2. 我不太理解两个带有许多感叹号的句子。 “ if（中途）（完成）”和“ if（完成）完成（完成）”，因为“ if”句子始终只写一个“（）”，而不是两个。
3. 请告诉我我在代码中哪里写错了什么。

非常感谢您的时间和指导。

伊桑·乔

原始代码：

- (void)flipTransitionWithOptions:(UIViewAnimationOptions)options halfway_1:(void (^)(BOOL finished))halfway completion:(void (^)(BOOL finished))completion
{
    CGFloat degree = (options & UIViewAnimationOptionTransitionFlipFromRight) ? -M_PI_2 : M_PI_2;


CGFloat duration = 0.4;
CGFloat distanceZ = 2000;
CGFloat translationZ = self.frame.size.width / 2;
CGFloat scaleXY = (distanceZ - translationZ) / distanceZ;

CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / -distanceZ; // perspective
rotationAndPerspectiveTransform = CATransform3DTranslate(rotationAndPerspectiveTransform, 0, 0, translationZ);

rotationAndPerspectiveTransform = CATransform3DScale(rotationAndPerspectiveTransform, scaleXY, scaleXY, 1.0);
self.layer.transform = rotationAndPerspectiveTransform;

[UIView animateWithDuration:duration / 2 animations:^{
    self.layer.transform = CATransform3DRotate(rotationAndPerspectiveTransform, degree, 0.0f, 1.0f, 0.0f);
} completion:^(BOOL finished){
    if (halfway) halfway(finished); !!!!!!!!!!!!!!!!!!!
    self.layer.transform = CATransform3DRotate(rotationAndPerspectiveTransform, -degree, 0.0f, 1.0f, 0.0f);
    [UIView animateWithDuration:duration / 2 animations:^{
        self.layer.transform = rotationAndPerspectiveTransform;
    } completion:^(BOOL finished){
        self.layer.transform = CATransform3DIdentity;
        if (completion) completion(finished); !!!!!!!!!!!!!!!!
    }];
}];




My copy-translated version:

UIView.animateWithDuration(duration / 2, animations: {self.layer.transform = CATransform3DRotate(rotationAndPerspectiveTrabsform, degree, 0.0, 1.0, 0.0)}, completion: {(finshed) -> Void in
        if halfway(finished) {
            self.layer.transform = CATransform3DRotate(rotationAndPerspectiveTrabsform, -degree, 0.0, 1.0, 0.0)
            UIView.animateWithDuration(duration / 2, animations: {self.layer.transform = rotationAndPerspectiveTrabsform}, completion: {(finished) -> Void in
                self.layer.transform = CATransform3DIdentity
                if completion(finshed){}
            })
        }
    }
    )

}

}

Answer 1

尝试在第一个参数上用NSTimeInterval(duration / 2)替换duration / 2 。