UIAlertView

一.

UIAlertView（警报）以蓝色圆角矩形都形式出现在屏幕的中部，警报可显示一个或多个按钮。

  - (void)viewDidLoad {

        UIAlertView *alert = [[UIAlertView alloc]
        initWithTitle:@”Hello”
        message:@”This is an alert view”
        delegate:self
        cancelButtonTitle:@”OK”
        otherButtonTitles:nil];
        [alert show];
        [alert release];
        [super viewDidLoad];
}

 

 

 二.

 

 #import <UIKit/UIKit.h>

@interface UsingViewsViewController : UIViewController
        <UIAlertViewDelegate> {
}
@end

 

 - (void)viewDidLoad {

    UIAlertView *alert = [[UIAlertView alloc]
    initWithTitle:@”Hello”
    message:@”This is an alert view”
    delegate:self
    cancelButtonTitle:@”OK”
    otherButtonTitles:@”Option 1”, @”Option 2”, nil];
    [alert show];
    [alert release];
    [super viewDidLoad];
}

 

 

 

 - (void)alertView:(UIAlertView *)alertView

clickedButtonAtIndex:(NSInteger)buttonIndex {
    NSLog(@”%d”, buttonIndex);
}

 

 OK button — 0

 Option 1 — 1

 Option 2 — 2