Question

我正在尝试将以下代码翻译成Swift 3.我觉得其他海报已经回答了这个问题，但我似乎无法解决这个问题。

- (BOOL)allowTouchForSubview:(UIView *)subview {
    NSArray *classes = @[[UITextField class], [UISearchBar class], [UITextView class]];
    for (Class class in classes) {
        if ([subview isKindOfClass:class]) {
            return YES;
        }
        if ([subview.superview isKindOfClass:class]) {
            return YES;
        }
    };
    return NO;
}

这是我到目前为止所拥有的：

func allowTouchForSubview(subview: UIView) -> Bool {
    let allowedClasses: [AnyClass] = [UITextField.self, UISearchBar.self, UITextView.self]
    for classType in allowedClasses {
        if subview is classType {
            return true
        }
        if let superview = subview.superview {
            if superview is classType {
                return true
            }
        }
    }
    return false
}

对classType的两个引用都有错误，并说明使用了未声明的类型classType＆＃39;。这是怎么回事？

Answer 1

试试这个：

    func allowTouchForSubview(subview: UIView) -> Bool {
         let allowedClasses: [AnyClass] = [UITextField.self, UISearchBar.self, UITextView.self]

    for classType in allowedClasses {
        if subview.isKind(of: classType)  || (subview.superview?.isKind(of: classType) ?? false) {
            return true
        }
    }
    return false 
}

进行测试：

let test = UITextView()
allowTouchForSubview(subview: test)//prints true

let textField = UITextField()
allowTouchForSubview(subview: textField)//prints true


let subview = UIView()
allowTouchForSubview(subview: subview) //prints false
test.addSubview(subview)
allowTouchForSubview(subview: subview) //prints true

Swift 3迭代过类的数组

1 个答案: