Snail—UI学习之提醒框UIAlertView

<pre name="code" class="objc">- (void)createAlertView{        //delegate已经是self了    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"友情提示" message:@"您好" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"ss",@"取消",@"撤销", nil];        [alert show];        [self.view addSubview:alert];    }//alertView的代理方法- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{    //alertView判断是哪一个提示框    //buttonIndex 最下面那个按钮下标是 0  其他的按钮从上往下从1依次增加        if (buttonIndex == 0) {        NSLog(@"确定");    }else if (buttonIndex == 2){        NSLog(@"取消");    }else if (buttonIndex == 3){        NSLog(@"撤销");    }else if (buttonIndex == 1){        NSLog(@"ss");    }    }

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