概述

目前我正在使用以下代码来呈现UIAlertView： UIAlertView *alert = [[UIAlertView alloc] initWithtitle:@"Today's Entry Complete" message:@"Press OK to submit your data!" de

目前我正在使用以下代码来呈现UIAlertView：

UIAlertView *alert = [[UIAlertView alloc] initWithtitle:@"Today's Entry Complete"
                        message:@"Press OK to submit your data!" 
                       delegate:nil 
              cancelButtontitle:@"OK" 
              otherButtontitles: nil];
    [alert show];
    [alert release];

如何得到它,以便当按下“OK”时,它会触发一个函数,例如 – (void)submitData

解决方法

注意：

重要提示：UIAlertView在iOS 8中已被弃用.(请注意,UIAlertViewDelegate也已被弃用.)要在iOS 8及更高版本中创建和管理警报,请改用UIAlertController与优先级的UIAlertControllerStyleAlertStyle.

Please check this out tutorial

“deprecated” means???

.h文件

@interface urViewController : UIViewController <UIAlertViewDelegate> {

.m文件

// Create Alert and set the delegate to listen events
UIAlertView *alert = [[UIAlertView alloc] initWithtitle:@"Today's Entry Complete"
                                                message:@"Press OK to submit your data!"
                                               delegate:self
                                      cancelButtontitle:nil
                                      otherButtontitles:@"OK",nil];

// Set the tag to alert unique among the other alerts.
// So that you can find out later,which alert we are handling
alert.tag = 100;

[alert show];


//[alert release];


-(void) alertView:(UIAlertView *)alertView clickedButtonATindex:(NSInteger)buttonIndex{


    // Is this my Alert View?
    if (alertView.tag == 100) {
        //Yes


    // You need to compare 'buttonIndex' & 0 to other value(1,2,3) if u have more buttons.
    // Then u can check which button was pressed.
        if (buttonIndex == 0) {// 1st Other Button

            [self submitData];

        }
        else if (buttonIndex == 1) {// 2nd Other Button


        }

    }
    else {
     //No
        // Other Alert View

    }

}

Swifty的方法是使用新的UIAlertController和closure：

// Create the alert controller
    let alertController = UIAlertController(title: "title",message: "message",preferredStyle: .Alert)

    // Create the actions
    let okAction = UIAlertAction(title: "OK",style: UIAlertActionStyle.Default) {
        UIAlertAction in
        NSLog("OK Pressed")
    }
    let cancelAction = UIAlertAction(title: "Cancel",style: UIAlertActionStyle.Cancel) {
        UIAlertAction in
        NSLog("Cancel Pressed")
    }

    // Add the actions
    alertController.addAction(okAction)
    alertController.addAction(cancelAction)

    // Present the controller
    self.presentViewController(alertController,animated: true,completion: nil)

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