• iOS 3D Touch实践


    本文主要讲解3DTouch各种场景下的开发方法,开发主屏幕应用icon上的快捷选项标签(Home Screen Quick Actions),静态设置 UIApplicationShortcutItem ,动态添加、修改UIApplicationShortcutItem,peek和pop的实现。 

    一、3DTouch开发准备工作(让模拟器也支持 3DTouch 的解决办法) 

    需要支持3DTouch的设备,如iPhone6s或以上、iOS9或以上、Xcode7或以上,估计很多和我一样的屌丝还没有iPhone6s,别怕,github上有人为我们提供了这样的一个插件,可以让我们在模拟器上进行3D Touch的效果测试。 https://github.com/DeskConnect/SBShortcutMenuSimulator

    安装和使用git主页里介绍的很清楚,只有一点需要注意,如果电脑中装有Xcode6和Xcode7两个版本,那个Xcode的编译路径,需要做如下修改。( Xcode2.app是你Xcode7版本的名字 ) 

    sudo xcode-select -switch /Applications/Xcode2.app/Contents/Developer/

    二、主屏幕 按压应用图标展示快捷选项 ( Home Screen Quick Actions ) 

    应用最多有4个快捷选项标签, iOS9为我们提供了2种方式来开发按压应用图标展示快捷选项功能(Home Screen Quick Actions)。 

    1.静态标签 

    打开我们项目的plist文件,添加如下项(选择框中并没有,需要我们手工敲上去)

    UIApplicationShortcutItems:数组中的元素就是我们的那些快捷选项标签。

    UIApplicationShortcutItemTitle:标签标题(必填)

    UIApplicationShortcutItemType:标签的唯一标识 (必填) 

    UIApplicationShortcutItemIconType:使用系统图标的类型,如搜索、定位、home等(可选)

    UIApplicationShortcutItemIcon File:使用项目中的图片作为标签图标 (可选) 

    UIApplicationShortcutItemSubtitle:标签副标题 (可选) 

    UIApplicationShortcutItemUserInfo:字典信息,如传值使用 (可选) 

    2.动态标签 

    在AppDelegate.m文件中加如下代码:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        ViewController *mainView = [storyboard instantiateViewControllerWithIdentifier:@"mainController"];
        UINavigationController *mainNav = [[UINavigationController alloc] initWithRootViewController:mainView];
        self.window.rootViewController = mainNav;
        [self.window makeKeyAndVisible];
        
        //创建应用图标上的3D touch快捷选项
        [self creatShortcutItem];
        
        UIApplicationShortcutItem *shortcutItem = [launchOptions valueForKey:UIApplicationLaunchOptionsShortcutItemKey];
        //如果是从快捷选项标签启动app,则根据不同标识执行不同操作,然后返回NO,防止调用- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler
        if (shortcutItem) {
            //判断先前我们设置的快捷选项标签唯一标识,根据不同标识执行不同操作
            if([shortcutItem.type isEqualToString:@"com.mycompany.myapp.one"]){
                NSArray *arr = @[@"hello 3D Touch"];
                UIActivityViewController *vc = [[UIActivityViewController alloc]initWithActivityItems:arr applicationActivities:nil];
                [self.window.rootViewController presentViewController:vc animated:YES completion:^{
                }];
            } else if ([shortcutItem.type isEqualToString:@"com.mycompany.myapp.search"]) {//进入搜索界面
                SearchViewController *childVC = [storyboard instantiateViewControllerWithIdentifier:@"searchController"];
                [mainNav pushViewController:childVC animated:NO];
            } else if ([shortcutItem.type isEqualToString:@"com.mycompany.myapp.share"]) {//进入分享界面
                SharedViewController *childVC = [storyboard instantiateViewControllerWithIdentifier:@"sharedController"];
                [mainNav pushViewController:childVC animated:NO];
            }
            return NO;
        }
        return YES;
    }
    
    //创建应用图标上的3D touch快捷选项
    - (void)creatShortcutItem {
        //创建系统风格的icon
        UIApplicationShortcutIcon *icon = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeShare];
        
    //    //创建自定义图标的icon
    //    UIApplicationShortcutIcon *icon2 = [UIApplicationShortcutIcon iconWithTemplateImageName:@"分享.png"];
        
        //创建快捷选项
        UIApplicationShortcutItem * item = [[UIApplicationShortcutItem alloc]initWithType:@"com.mycompany.myapp.share" localizedTitle:@"分享" localizedSubtitle:@"分享副标题" icon:icon userInfo:nil];
        
        //添加到快捷选项数组
        [UIApplication sharedApplication].shortcutItems = @[item];
    }

    效果图:

    3.点击快捷选项标签进入应用的响应 

    在AppDelegate.m文件中加如下代码:

    //如果app在后台,通过快捷选项标签进入app,则调用该方法,如果app不在后台已杀死,则处理通过快捷选项标签进入app的逻辑在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions中
    - (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler {
        
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        ViewController *mainView = [storyboard instantiateViewControllerWithIdentifier:@"mainController"];
        UINavigationController *mainNav = [[UINavigationController alloc] initWithRootViewController:mainView];
        self.window.rootViewController = mainNav;
        [self.window makeKeyAndVisible];
        
        //判断先前我们设置的快捷选项标签唯一标识,根据不同标识执行不同操作
        if([shortcutItem.type isEqualToString:@"com.mycompany.myapp.one"]){
            NSArray *arr = @[@"hello 3D Touch"];
            UIActivityViewController *vc = [[UIActivityViewController alloc]initWithActivityItems:arr applicationActivities:nil];
            [self.window.rootViewController presentViewController:vc animated:YES completion:^{
            }];
        } else if ([shortcutItem.type isEqualToString:@"com.mycompany.myapp.search"]) {//进入搜索界面
            SearchViewController *childVC = [storyboard instantiateViewControllerWithIdentifier:@"searchController"];
            [mainNav pushViewController:childVC animated:NO];
        } else if ([shortcutItem.type isEqualToString:@"com.mycompany.myapp.share"]) {//进入分享界面
            SharedViewController *childVC = [storyboard instantiateViewControllerWithIdentifier:@"sharedController"];
            [mainNav pushViewController:childVC animated:NO];
        }
        
        if (completionHandler) {
            completionHandler(YES);
        }
    }

    4.修改UIApplicationShortcutItem 

    //获取第0个shortcutItem
        UIApplicationShortcutItem *shortcutItem0 = [[UIApplication sharedApplication].shortcutItems objectAtIndex:0];
        //将shortcutItem0的类型由UIApplicationShortcutItem改为可修改类型UIMutableApplicationShortcutItem
        UIMutableApplicationShortcutItem * newShortcutItem0 = [shortcutItem0 mutableCopy];
        //修改shortcutItem的标题
        [newShortcutItem0 setLocalizedTitle:@"按钮1"];
        //将shortcutItems数组改为可变数组
        NSMutableArray *newShortcutItems = [[UIApplication sharedApplication].shortcutItems mutableCopy];
        //替换原ShortcutItem
        [newShortcutItems replaceObjectAtIndex:0 withObject:newShortcutItem0];
        [UIApplication sharedApplication].shortcutItems = newShortcutItems;

    三、peek(展示预览)和pop(跳页至预览的界面) 

    1. 首先给view注册3DTouch的peek(预览)和pop功能,我这里给cell注册 3DTouch的peek(预览)和pop功能 

    -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myCell"];
        if (cell == nil) {
            cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"myCell"];
        }
        cell.textLabel.text = _myArray[indexPath.row];
        if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
            NSLog(@"3D Touch  可用!");
            //给cell注册3DTouch的peek(预览)和pop功能
            [self registerForPreviewingWithDelegate:self sourceView:cell];
        } else {
            NSLog(@"3D Touch 无效");
        }
        return cell;
    }

    2.需要继承协议UIViewControllerPreviewingDelegate

    3.实现UIViewControllerPreviewingDelegate方法

    //peek(预览)
    - (nullable UIViewController *)previewingContext:(id <UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location
    {
        //获取按压的cell所在行,[previewingContext sourceView]就是按压的那个视图
        NSIndexPath *indexPath = [_myTableView indexPathForCell:(UITableViewCell* )[previewingContext sourceView]];
        
        //设定预览的界面
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        SearchViewController *childVC = [storyboard instantiateViewControllerWithIdentifier:@"searchController"];
        childVC.preferredContentSize = CGSizeMake(0.0f,500.0f);
        childVC.str = [NSString stringWithFormat:@"我是%@,用力按一下进来",_myArray[indexPath.row]];
        
        //调整不被虚化的范围,按压的那个cell不被虚化(轻轻按压时周边会被虚化,再少用力展示预览,再加力跳页至设定界面)
        CGRect rect = CGRectMake(0, 0, self.view.frame.size.width,40);
        previewingContext.sourceRect = rect;
        
        //返回预览界面
        return childVC;
    }
    
    //pop(按用点力进入)
    - (void)previewingContext:(id <UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
         [self showViewController:viewControllerToCommit sender:self];
     }

    效果图:( 当用户按下时cell周边会虚化,增加压力达到一定值会弹出设定的预览界面,继续增加力按压会跳页至预览界面 ) 

    4.打开预览的视图的.m文件,我这里是 SearchViewController .m中加上如下代码: 

    - (NSArray<id<UIPreviewActionItem>> *)previewActionItems {
        // setup a list of preview actions
        UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@"Aciton1" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
            NSLog(@"Aciton1");
        }];
        
        UIPreviewAction *action2 = [UIPreviewAction actionWithTitle:@"Aciton2" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
            NSLog(@"Aciton2");
        }];
        
        UIPreviewAction *action3 = [UIPreviewAction actionWithTitle:@"Aciton3" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
            NSLog(@"Aciton3");
        }];
        
        NSArray *actions = @[action1,action2,action3];
        
        // and return them (return the array of actions instead to see all items ungrouped)
        return actions;
    }

    效果图:(当弹出预览时,上滑预览视图,出现预览视图中快捷选项)

    这个方法在 - (NSArray> *)previewActionItems  中返回action 的数组

    有趣的是 如果我们对action 继续包装一个数组 还是可以的,上代码:

    NSMutableArray *allActions = [NSMutableArray array];
        for (int i = 0; i < DATA.count; i ++) {
            UIPreviewAction *action = [UIPreviewAction actionWithTitle:DATA[i] style:i % 3 handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
                NSLog(@"Jump into---%@",previewViewController);
                CustomNaviViewController *naviVC = (CustomNaviViewController*)[UIApplication sharedApplication].delegate.window.rootViewController;
                [naviVC pushViewController:previewViewController animated:YES];
                [self setViewIndex:i];
            }];
            [allActions addObject:action];
        }
        
        UIPreviewActionGroup *group = [UIPreviewActionGroup actionGroupWithTitle:@"查看全部" style:UIPreviewActionStyleDestructive actions:allActions];

    这里要说明一下的是,UIPreviewActionItem作为方法

    - (NSArray<id<UIPreviewActionItem>> *)previewActionItems

    的返回值,UIPreviewAction、UIPreviewActionGroup都可以作为返回值处理。

    四、3DTouch压力值的运用 

    直接上图、上代码更直观,注释也很清楚,这是我的SearchViewController界面。

    直接在SearchViewController.m加这个方法即可,按压SearchViewController中的任何视图都会调用这个方法

    //按住移动or压力值改变时的回调
    -(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
        NSArray *arrayTouch = [touches allObjects];
        UITouch *touch = (UITouch *)[arrayTouch lastObject];
        //通过tag确定按压的是哪个view,注意:如果按压的是label,将label的userInteractionEnabled属性设置为YES
        if (touch.view.tag == 105) {
            NSLog(@"move压力 = %f",touch.force);
            //红色背景的label显示压力值
            _lbForce.text = [NSString stringWithFormat:@"压力%f",touch.force];
            //红色背景的label上移的高度=压力值*100
            _bottom.constant = ((UITouch *)[arrayTouch lastObject]).force * 100;
        }
    }

    好了,用不同力度按压那个蓝色背景的label,感受一下力度的变化吧,会看到随着力度的变化红色背景的label会上下移动。

    源码: https://github.com/zhanglinfeng/Demo3DTouch.git

    来自: http://www.cnblogs.com/zhanglinfeng/p/5133939.html

    链接:

    iOS9新特性 3DTouch 开发教程全解(含源码

    iOS9 3D touch 适配开发

    iOS9新特性 3DTouch 开发教程全解(含源码)

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  • 原文地址:https://www.cnblogs.com/On1Key/p/5884949.html
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