iPad开发中UIPopoverPresentationController的使用

蔚落 2022-05-18 08:25 363阅读 0赞

效果图  
!\[UIPopoverPresentationController使用([https://img-blog.csdn.net/20180801112016614?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3BvdGF0bzUxMg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70][https_img-blog.csdn.net_20180801112016614_watermark_2_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3BvdGF0bzUxMg_font_5a6L5L2T_fontsize_400_fill_I0JBQkFCMA_dissolve_70])

`UIPopoverPresentationController`使用说明  
1、创建弹窗视图控制器，如：MenuController  
2、实例化弹窗视图控制器时，设置其显示大小`preferredContentSize`和显示模式`modalPresentationStyle`  
3、根据实例化的弹窗视图控制器获取视图控制器`UIPopoverPresentationController`  
4、设置`UIPopoverPresentationController`的相关属性，如：箭头显示方向`permittedArrowDirections`、显示视图`sourceView`、显示位置`sourceRect`、显示时的背景颜色`backgroundColor`  
5、根据需要设置代理`delegate`，及实现代理协议`UIPopoverPresentationControllerDelegate`方法  
6、显示，如：`[self presentViewController:self.menuVC animated:YES completion:nil];`  
7、隐藏，如：`[self dismissViewControllerAnimated:YES completion:NULL];`

> 使用注意事项：设置显示位置`sourceRect`和显示视图`sourceView`时，通常是根据子视图的来做处理的。如，要显示在按钮button的旁边，则`sourceView`为button，且`sourceRect`为button的`button.bounds`；或`sourceView`为button的父视图view，且`sourceRect`为buttond在父视图view的位置`button.frame`；

代码示例  
1、继承`UIViewController`创建视图控制器`MenuViewController`

#import <UIKit/UIKit.h>
    
    @interface MenuViewController : UIViewController
    
    @property (nonatomic, copy) void (^itemClick)(NSInteger index);
    
    @end

#import "MenuViewController.h"
    
    @interface MenuViewController () <UITableViewDelegate, UITableViewDataSource>
    
    @end
    
    @implementation MenuViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
    
        UITableView *tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
        [self.view addSubview:tableView];
        tableView.delegate = self;
        tableView.dataSource = self;
        [tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"UITableViewCell"];
        tableView.tableFooterView = [UIView new];
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
        return 30;
    }
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"UITableViewCell"];
        cell.textLabel.text = [NSString stringWithFormat:@"%@", @(indexPath.row)];
        return cell;
    }
    
    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
    {
        [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
        if (self.itemClick) {
            self.itemClick(indexPath.row);
        }
    }
    
    @end

2、使用

//
    // ViewController.m
    // demo
    //
    // Created by zhangshaoyu on 2018/7/30.
    // Copyright © 2018年 zhangshaoyu. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "MenuViewController.h"
    
    @interface ViewController () <UIPopoverPresentationControllerDelegate>
    
    @property (nonatomic, strong) MenuViewController *menuVC;
    
    @property (nonatomic, strong) UIButton *button;
    @property (nonatomic, strong) UIButton *button1;
    @property (nonatomic, strong) UIButton *button2;
    @property (nonatomic, strong) UIButton *button3;
    @property (nonatomic, strong) UIButton *button4;
    @property (nonatomic, strong) UIButton *button5;
    @property (nonatomic, strong) UIButton *button6;
    @property (nonatomic, strong) UIButton *button7;
    @property (nonatomic, strong) UIButton *button8;
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
    
        self.navigationItem.title = @"测试";
    
        //
        self.button = [[UIButton alloc] initWithFrame:CGRectMake(10.0, 10.0, 80.0, 30.0)];
        [self.view addSubview:self.button];
        [self.button setTitle:@"级别0" forState:UIControlStateNormal];
        [self.button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button1 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 80.0) / 2, 10.0, 80.0, 30.0)];
        [self.view addSubview:self.button1];
        [self.button1 setTitle:@"级别1" forState:UIControlStateNormal];
        [self.button1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button1 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button1 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button2 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 10.0 - 80.0), 10.0, 80.0, 30.0)];
        [self.view addSubview:self.button2];
        [self.button2 setTitle:@"级别2" forState:UIControlStateNormal];
        [self.button2 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button2 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button2 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button3 = [[UIButton alloc] initWithFrame:CGRectMake(10.0, (self.view.frame.size.height - 30.0) / 2, 80.0, 30.0)];
        [self.view addSubview:self.button3];
        [self.button3 setTitle:@"级别3" forState:UIControlStateNormal];
        [self.button3 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button3 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button3 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button4 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 80.0) / 2, (self.view.frame.size.height - 30.0) / 2, 80.0, 30.0)];
        [self.view addSubview:self.button4];
        [self.button4 setTitle:@"级别4" forState:UIControlStateNormal];
        [self.button4 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button4 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button4 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button5 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 10.0 - 80.0), (self.view.frame.size.height - 30.0) / 2, 80.0, 30.0)];
        [self.view addSubview:self.button5];
        [self.button5 setTitle:@"级别5" forState:UIControlStateNormal];
        [self.button5 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button5 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button5 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button6 = [[UIButton alloc] initWithFrame:CGRectMake(10.0, (self.view.frame.size.height - 10.0 - 30.0), 80.0, 30.0)];
        [self.view addSubview:self.button6];
        self.button6.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
        [self.button6 setTitle:@"级别6" forState:UIControlStateNormal];
        [self.button6 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button6 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button6 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button7 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 80.0) / 2, (self.view.frame.size.height - 10.0 - 30.0), 80.0, 30.0)];
        [self.view addSubview:self.button7];
        self.button7.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
        [self.button7 setTitle:@"级别7" forState:UIControlStateNormal];
        [self.button7 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button7 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button7 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        //
        self.button8 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 10.0 - 80.0), (self.view.frame.size.height - 10.0 - 30.0), 80.0, 30.0)];
        [self.view addSubview:self.button8];
        self.button8.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
        [self.button8 setTitle:@"级别8" forState:UIControlStateNormal];
        [self.button8 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.button8 setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [self.button8 addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    - (void)loadView
    {
        [super loadView];
        if ([self respondsToSelector:@selector(setEdgesForExtendedLayout:)]) {
            [self setEdgesForExtendedLayout:UIRectEdgeNone];
        }
    }
    
    // 显示弹窗
    - (void)buttonClick:(UIButton *)button
    {
        UIPopoverPresentationController *popover = [self.menuVC popoverPresentationController];
        popover.delegate = self;
        popover.permittedArrowDirections = UIPopoverArrowDirectionUp;//设置箭头位置
        // 1方法
    // popover.sourceView = self.view;//设置目标视图
    // popover.sourceRect = button.frame;//弹出视图显示位置
        // 2方法
        popover.sourceView = button;//设置目标视图
        popover.sourceRect = button.bounds;//弹出视图显示位置
        //
        popover.backgroundColor = [UIColor whiteColor];//设置弹窗背景颜色
        //
        [self presentViewController:self.menuVC animated:YES completion:nil];
    }
    
    // 菜单视图选择并隐藏弹窗
    - (void)itemClick:(NSInteger)index
    {
        NSLog(@"index = %@", @(index + 1));
        [self dismissViewControllerAnimated:YES completion:NULL];
    }
    
    - (MenuViewController *)menuVC
    {
        if (_menuVC == nil) {
            _menuVC = [MenuViewController new];
            //
            ViewController __weak *weakSelf = self;
            _menuVC.itemClick = ^(NSInteger index) {
                [weakSelf itemClick:index];
            };
            //
            _menuVC.preferredContentSize = CGSizeMake(300, 200);// 设置浮窗的宽高
            _menuVC.modalPresentationStyle = UIModalPresentationPopover;
        }
        return _menuVC;
    }
    
    #pragma mark - 代理方法
    
    // 设置 浮窗弹窗的推出样式，效果图中设置style为UIModalPresentationNone
    - (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller
    {
        NSLog(@"1 %s", __func__);
        return UIModalPresentationPopover;
    }
    
    // 点击浮窗背景popover controller是否消失
    - (BOOL)popoverPresentationControllerShouldDismissPopover:(UIPopoverPresentationController *)popoverPresentationController
    {
        NSLog(@"2 %s", __func__);
        return YES;
    }
    
    // 浮窗消失时调用
    - (void)popoverPresentationControllerDidDismissPopover:(UIPopoverPresentationController *)popoverPresentationController
    {
        NSLog(@"3 %s", __func__);
    }
    
    @end

[https_img-blog.csdn.net_20180801112016614_watermark_2_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3BvdGF0bzUxMg_font_5a6L5L2T_fontsize_400_fill_I0JBQkFCMA_dissolve_70]: https://img-blog.csdn.net/20180801112016614?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3BvdGF0bzUxMg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70