Question

我有一个字符串数组，我想用于UIActionSheet上的按钮标题。不幸的是，方法调用中的otherButtonTitles：参数采用可变长度的字符串列表，而不是数组。

那我怎么能把这些标题传递到UIActionSheet呢？我见过的解决方法是将nil传递给otherButtonTitles :,然后使用addButtonWithTitle：单独指定按钮标题。但这有将“取消”按钮移动到UIActionSheet上的第一个位置而不是最后一个位置的问题;我希望它是最后一个。

有没有办法1）传递数组代替变量字符串列表，或者2）将取消按钮移动到UIActionSheet的底部？

感谢。

Answer 1

我让这个工作（你只需要，可以使用常规按钮，然后在以下后添加：

NSArray *array = @[@"1st Button",@"2nd Button",@"3rd Button",@"4th Button"];

    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Title Here"
                                                             delegate:self
                                                    cancelButtonTitle:nil
                                               destructiveButtonTitle:nil
                                                    otherButtonTitles:nil];

    // ObjC Fast Enumeration
    for (NSString *title in array) {
        [actionSheet addButtonWithTitle:title];
    }

    actionSheet.cancelButtonIndex = [actionSheet addButtonWithTitle:@"Cancel"];

    [actionSheet showInView:self.view];

Answer 2

一个小注意事项：[actionSheet addButtonWithTitle：]返回该按钮的索引，因此为了安全起见并“干净”，您可以这样做：

actionSheet.cancelButtonIndex = [actionSheet addButtonWithTitle:@"Cancel"];

Answer 3

采取Jaba和Nick的答案并进一步扩展它们。要在此解决方案中加入销毁按钮：

// Create action sheet
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:title
                                                         delegate:self
                                                cancelButtonTitle:nil
                                           destructiveButtonTitle:nil
                                                otherButtonTitles:nil];
// Action Buttons
for (NSString *actionName in actionNames){
    [actionSheet addButtonWithTitle: actionName];
}

// Destruction Button
if (destructiveName.length > 0){
    [actionSheet setDestructiveButtonIndex:[actionSheet addButtonWithTitle: destructiveName]];
}

// Cancel Button
[actionSheet setCancelButtonIndex: [actionSheet addButtonWithTitle:@"Cancel"]];

// Present Action Sheet
[actionSheet showInView: self.view];

Answer 4

响应的快速版本：

//array with button titles
private var values = ["Value 1", "Value 2", "Value 3"]

//create action sheet
let actionSheet = UIActionSheet(title: nil, delegate: self, cancelButtonTitle: nil, destructiveButtonTitle: nil)
//for each value in array
for value in values{
    //add a button
    actionSheet.addButtonWithTitle(value as String)
}
//display action sheet
actionSheet.showInView(self.view)

要选择值，请将委托添加到ViewController：

class MyViewController: UIViewController, UIActionSheetDelegate

实现方法“clickedButtonAtIndex”

func actionSheet(actionSheet: UIActionSheet, clickedButtonAtIndex buttonIndex: Int) {
    let selectedValue : String = values[buttonIndex]
}

通过传入数组而不是varlist来创建UIActionSheet的“otherButtons”

4 个答案: