iOS 警告窗口

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- (IBAction)buttonPressed:(id)sender {
    
    NSDate *date=self.datePicker.date;
    NSString *message=[[NSString alloc]initWithFormat:@"The date and time you select is %@",date];
    UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"Date and Time selected" message:message preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *action=[UIAlertAction actionWithTitle:@"That‘s so true!" style:UIAlertActionStyleDefault handler:nil];
    
    [alert addAction:action];
    [self presentViewController:alert animated:YES completion:nil];
}

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iOS 警告窗口

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原文地址：http://www.cnblogs.com/Montauk/p/5556480.html