Question

我有以下实现可以重用整个应用程序。我将以下代码存储在 Utility.m 类中。

CustomViewController.m

如何在以下

中捕获点击事件

[self presentViewController:[Utility oneButtonDisplayAlert:@"Error" withMessage:@"Please try again later"] animated:YES completion:nil];

Utility.m

+ (UIAlertController *)oneButtonDisplayAlert : (NSString*)title withMessage : (NSString*) message
{
    UIAlertController * alert = [UIAlertController
                                 alertControllerWithTitle:title
                                 message:message
                                 preferredStyle:UIAlertControllerStyleAlert];


    UIAlertAction* yesButton = [UIAlertAction
                                actionWithTitle:@"OK"
                                style:UIAlertActionStyleDefault
                                handler:^(UIAlertAction * action) {
                                    //Handle your yes please button action here
                                }];


    [alert addAction:yesButton];

    return alert;

}

Answer 1

将块参数添加到oneButtonDisplayAlert:withMessage:方法中。在警报操作的处理程序中调用该块。

+ (UIAlertController *)oneButtonDisplayAlert:(NSString *)title withMessage:(NSString *)message andOKHandler:(void (^)(void))handler
{
    UIAlertController * alert = [UIAlertController
                                 alertControllerWithTitle:title
                                 message:message
                                 preferredStyle:UIAlertControllerStyleAlert];


    UIAlertAction* yesButton = [UIAlertAction
                                actionWithTitle:@"OK"
                                style:UIAlertActionStyleDefault
                                handler:^(UIAlertAction * action) {
                                    if (handler) {
                                        handler();
                                    }
                                }];


    [alert addAction:yesButton];

    return alert;
}

然后将其称为：

UIAlertController *alert = [Utility oneButtonDisplayAlert:@"Error" withMessage:@"Please try again later" andOKHandler:^{
    // whatever code you need when OK tapped
}];
[self presentViewController:alert animated:YES completion:nil];

注意：此答案中的代码可能有拼写错误。语法未经验证。

检测警报按钮单击“事件”

1 个答案: