添加文本提示框

#import "SecondViewController.h"  
#import "AppDelegate.h"  
  
@interface SecondViewController ()  
  
@end  
  
@implementation SecondViewController  
  
- (void)viewDidLoad {  
  [super viewDidLoad];  
    
}  
  
- (IBAction)Click:(id)sender {  
    
  UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"请输入个人信息" preferredStyle:UIAlertControllerStyleAlert];  
  //增加确定按钮；  
  [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {  
    //获取第1个输入框；  
    UITextField *userNameTextField = alertController.textFields.firstObject;  
      
    //获取第2个输入框；  
    UITextField *passwordTextField = alertController.textFields.lastObject;  
      
    NSLog(@"用户名 = %@，密码 = %@",userNameTextField.text,passwordTextField.text);  
      
  }]];  
    
  //增加取消按钮；  
  [alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:nil]];  
    
  //定义第一个输入框；  
  [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {  
    textField.placeholder = @"请输入用户名";  
  }];  
  //定义第二个输入框；  
  [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {  
    textField.placeholder = @"请输入密码";  
  }];  
    
  [self presentViewController:alertController animated:true completion:nil];  
    
}  
  
  
  
@end