使用未声明的类型'UIViewControllerContextTransit'

Question

我是Swift的新手。我在斯威夫特3.

func transitionDuration(using transitionContext: UIViewControllerContextTransit.ioning?) -> TimeInterval { 
    return 0.75 
} 

上自定义转换我收到错误：

Use of undeclared type 'UIViewControllerContextTransit'

不要任何人知道解决这个？

Answer 1

您在代码中有错误打印。您需要更改UIViewControllerContextTransit.ioning到UIViewControllerContextTransitioning 您的代码看起来像

func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval { 
    return 0.75 
}