iOS基础控件---UIAlertView

//
//  ViewController.h
//
//
//  Created by pengjiaxin on 2017/10/16.
//  Copyright © 2017年 pengjiaxin. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    //定义一个警告对话框视图对象
    UIAlertView *_alertView;
    
}


@property (nonatomic, strong) UIAlertView *alertView;


@end

//
//  ViewController.m
//
//
//  Created by pengjiaxin on 2017/10/16.
//  Copyright © 2017年 pengjiaxin. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()<UIAlertViewDelegate
>

@end

@implementation ViewController
//同步---
@synthesize alertView = _alertView;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 40);
    [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    
    
    [button setTitle:@"警示对话框" forState:UIControlStateNormal];
    
    [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    
    
}

-(void)buttonAction:(UIButton *)button{
    _alertView = [[UIAlertView alloc]initWithTitle:@"警告" message:@"alertMessage" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"OK",@"11", nil];
    [_alertView show];
    
}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    
    //0:cancelButtonTitle:取消
    //1:ok
    //2:
    NSLog(@"%ld",(long)buttonIndex);
}
//对话框即将消失
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex{
    NSLog(@"即将消失");
}

//对话框已经消失
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex{
    NSLog(@"已经消失");
}




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


@end