iOS UI-AlertView（警示框）和ActionSheet（选择框、操作表单）

#import "ViewController.h"

@interface ViewController ()<UIAlertViewDelegate,UIActionSheetDelegate>

@end

@implementation ViewController

#pragma mark - 生命周期
- (void)viewDidLoad {
    [super viewDidLoad];
    // 创建展示AlertView的按钮
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
    [btn setTitle:@"AlertView" forState:UIControlStateNormal];
    [btn setFrame:CGRectMake(130, 150, 100, 100)];
    //btn.center =self.view.center;
    [btn setBackgroundColor:[UIColor orangeColor]];
    [btn addTarget:self action:@selector(showAlert) forControlEvents:UIControlEventTouchUpInside];
    
    // 创建展示ActionSheet的按钮
    [self.view addSubview:btn];
    UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeSystem];
    [btn1 setTitle:@"ActionSheet" forState:UIControlStateNormal];
    [btn1 setFrame:CGRectMake(130, 300, 100, 100)];
    [btn1 setBackgroundColor:[UIColor redColor]];
    [btn1 addTarget:self action:@selector(showActionSheet) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn1];
    

}
#pragma mark - 关联事件

#pragma mark - 警示框
- (void)showAlert
{
    /*
     
     UIAlertView警示框控件
     注意
     不用创建全局的Alert
     尽量不要关联逻辑操作，如果关联实现协议：UIAlertViewDelegate以及里面的协议方法
     
     */
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"错误"
                                                    message:@"网络连接失败"
                                                   delegate:self
                                          cancelButtonTitle:@"好的"
                                          otherButtonTitles:@"方案1",@"方案2",@"方案3", nil];
    
    [alert show];
}
#pragma mark - 选择框
- (void)showActionSheet
{
    /*
     
     UIActionSheet 选择框
     注意
     不用创建全局的UIActionSheet
     尽量关联逻辑操作，如果关联实现协议：UIActionSheetDelegate以及里面的协议方法
     
     */

    UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:@"请选择你的节操充值额度"
                                                        delegate:self
                                               cancelButtonTitle:@"算了，不要了"
                                          destructiveButtonTitle:@"18.00RMB"
                                               otherButtonTitles:@"19.00RMB",@"20.00RMB",@"21.00RMB", nil];
    
    [action showInView:self.view];
}

#pragma mark - 选择框代理方法
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            NSLog(@"第一种情况");
            break;
        case 1:
            NSLog(@"第二种情况");
            break;
        case 2:
            NSLog(@"第三种情况");
            break;
        case 3:
            NSLog(@"第四种情况");
            break;
        case 4:
            NSLog(@"第五种情况");
            break;
            
        default:
            break;
    }
}
#pragma mark - 警示框代理方法
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            NSLog(@"序号为0");
            break;
        case 1:
            NSLog(@"序号为1");
            break;
        case 2:
            NSLog(@"序号为2");
            break;
        case 3:
            NSLog(@"序号为3");
            break;
            
        default:
            break;
    }
}


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

@end

//
//  ViewController.m
//  IOS_0226_UIAlertController
//
//  Created by ma c on 16/2/26.
//  Copyright © 2016年 博文科技. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIButton *btnClick;

@end

@implementation ViewController

/*
 UIPresentationController ->管理所有Modal出来的控制器
 
 1.管理所有通过presentViewController方法显示出来的控制器
 2.只要调用了presentViewController方法就会创建UIPresentationController
 3.管理/监听切换控制器的过程
 4.属性
 //当前控制器
 @property(nonatomic, strong, readonly) UIViewController *presentingViewController;
 //切换的控制器
 @property(nonatomic, strong, readonly) UIViewController *presentedViewController;
 //切换的控制器视图
 - (nullable UIView *)presentedView;
 
 5.UIViewController属性
 
 @property (nonatomic,readonly) UIPresentationController *presentationController
 @property (nonatomic,readonly) UIPopoverPresentationController *popoverPresentationController
 
 这两个属性指向UIPresentationController

 */

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor cyanColor];
    

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    //[self createAlertVC];
    [self createPopoverPresentationVC];
}

- (void)createAlertVC
{
    //警示框
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"好久不见，你又不乖了。" preferredStyle:UIAlertControllerStyleAlert];
    //添加按钮
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
        NSLog(@"点击了确定按钮");
    }];

    [alert addAction:action];
    
    [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        NSLog(@"点击了取消按钮");
    }]];
    
    //添加文本框
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.borderStyle = UITextBorderStyleRoundedRect;
        textField.textColor = [UIColor redColor];
        textField.text = @"123";
        [textField addTarget:self action:@selector(uernameChange:) forControlEvents:UIControlEventEditingChanged];
        
    }];
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.borderStyle = UITextBorderStyleRoundedRect;

        textField.secureTextEntry = YES;
        textField.text = @"123";
    }];
    [self presentViewController:alert animated:nil completion:nil];
}

- (void)uernameChange:(UITextField *)textField
{
    NSLog(@"%@",textField.text);
}


- (void)createPopoverPresentationVC
{
    UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:@"提示" message:@"请选择操作" preferredStyle:UIAlertControllerStyleActionSheet];
    //设置展示形式
    actionSheet.modalTransitionStyle = UIModalPresentationPopover;
    self.popoverPresentationController.sourceView = self.btnClick;
    self.popoverPresentationController.sourceRect = self.btnClick.bounds;
    
    
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
        NSLog(@"点击了确定按钮");
    }];
    [actionSheet addAction:action];
    
    [actionSheet addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        NSLog(@"点击了取消按钮");
    }]];
    
    [self presentViewController:actionSheet animated:nil completion:nil];
    
}



@end