Question

为了添加一个看起来像Passbook-Menu＆＃39;的菜单。在我的Swift应用程序中，我从Github找到了一个用Objective-C编写的适当的演示。我顺利地将ObjC翻译成Swift，直到我在原始演示中找到两个Block。我知道在我检查了一些指南书后，Block应该被翻译成Closure。

我试过但我失败了。 Complier抛出了＆＃34; animatedWithDuration（）缺少参数＆＃39; delay＆＃39; ＆＃34;

首先，我需要声明我没有选择animatedWithDuration（）具有参数＆＃39; delay＆＃39;。
我不太明白两句被许多惊叹号标记的句子。＆＃34;如果（中途）中途（完成）＆＃34;和＃34;如果（完成）完成（完成）＆＃34;因为＆＃39; if＆＃39;句子总是只写一个＆＃39;（）＆＃39;而不是两个。
请告诉我我的代码在哪里写错了。

非常感谢您的时间和指导。

Ethan Joe

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将duration / 2替换为NSTimeInterval(duration / 2)。

参数'delay'的方法“animatedWithDuration（）”缺少参数

1 个答案: