ViewController.m

//
//  ViewController.m
//  LocalizedEngineDemo
//
//  Created by Zhao Yiqi on 2017/2/13.
//  Copyright © 2017年 Zhao Yiqi. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor=[UIColor whiteColor];
    
    UIButton *btn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn.frame=CGRectMake(0, 0, 200, 60);
    btn.center=self.view.center;
    [btn setTitle:@"点击" forState:UIControlStateNormal];
    [self.view addSubview:btn];
    [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)btnClick{
    UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"message title" message:@"message text" preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [alert dismissViewControllerAnimated:YES completion:nil];
    }]];
    [self presentViewController:alert animated:YES completion:nil];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end