iOS 3D Touch简单使用

由于3d touch功能只在部分机型可以使用,因此在使用前需要判断手机是否支持该功能

//判断3d touch是否可用    if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {        [self addTouchItems];    }

3d touch的标签有2种设置方式,一种静态的,一种动态的,静态的需要直接在info.plist文件中添加字段,动态的则只有在程序运行过后才会产生.

1.静态添加
在info.plist文件中添加以下字段和内容

2.动态添加
在App的根视图添加以下代码

- (void)addTouchItems {    UIApplicationShortcutIcon * icon1 = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypePlay];    UIApplicationShortcutItem * item1 = [[UIApplicationShortcutItem alloc] initWithType:@"c" localizedTitle:@"vc3" localizedSubtitle:nil icon:icon1 userInfo:nil];    UIApplicationShortcutIcon * icon2 = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeSearch];    UIApplicationShortcutItem * item2 = [[UIApplicationShortcutItem alloc] initWithType:@"d" localizedTitle:@"vc4" localizedSubtitle:nil icon:icon2 userInfo:nil];    //自定义icon图标    UIApplicationShortcutIcon * icon3 = [UIApplicationShortcutIcon iconWithTemplateImageName:@""];    [UIApplication sharedApplication].shortcutItems = @[item1, item2];}

完成后效果图如下

当用户通过点击快速标签进入App时如何回应
在Appdelegate中有新的回调方法可以使用

//当点击快速标签进入app时调用- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler {    if ([shortcutItem.type isEqualToString:@"a"]) {        self.window.rootViewController.view.backgroundColor = [UIColor redColor];    } else {        self.window.rootViewController.view.backgroundColor = [UIColor greenColor];    }}

peek预览视图

要实现peek预览,需要接收UIViewControllerPreviewingDelegate协议,实现协议方法,同时,要对需要实现预览的view进行注册
假设要对一个tableview中的每个cell进行预览,代码如下

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:@"mycell" forIndexPath:indexPath];    [self registerForPreviewingWithDelegate:self sourceView:cell];   //这一句对每个cell进行注册,可以实现按压每个cell实现预览    cell.textLabel.text = self.dataArr[indexPath.row];    return cell;}

注册完成后需要实现2个代理方法

//获取按压的cell,展示预览视图(peek)- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location {    //根据按压位置获得按压视图//    CGPoint p = [self.table convertPoint:location fromCoordinateSpace:self.view];//    NSIndexPath * path = [self.table indexPathForRowAtPoint:p];//    UITableViewCell * cell = [self.table cellForRowAtIndexPath:path];    //[previewingContext sourceView] 获取重压所在的view    NSIndexPath * indexPath = [self.table indexPathForCell:(UITableViewCell *)[previewingContext sourceView]];    UITableViewCell * cell = [self.table cellForRowAtIndexPath:indexPath];    UIStoryboard * sb = [UIStoryboard storyboardWithName:@"Main" bundle:nil];    UIViewController * detail = [sb instantiateViewControllerWithIdentifier:NSStringFromClass([DetailViewController class])];    detail.preferredContentSize = CGSizeMake(0, self.view.frame.size.height);    UILabel * lab = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 100, 30)];    lab.text = cell.textLabel.text;    [detail.view addSubview:lab];    return detail;}//进入预览视图(pop)- (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {    //以这种方式进入详情控制器后可以返回预览视图    [self.navigationController pushViewController:viewControllerToCommit animated:YES];    //以这种方式进入的话无法返回    [self showDetailViewController:viewControllerToCommit sender:self];}

效果图

出现预览视图时,我们可以向上滑动,底部会出现几个选项,这些选项的配置需要在预览视图中配置,假设当前是在a控制器,预览视图是b控制器,那么需要在b中写

//设置peek后显示的视图向上滑动时底部显示的选项- (NSArray<id<UIPreviewActionItem>> *)previewActionItems {    UIPreviewAction *p1 = [UIPreviewAction actionWithTitle:@"选项1" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {        //点击选项后触发的操作        NSLog(@"1111111");        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:@"111111" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];        [alert show];    }];    UIPreviewAction *p2 = [UIPreviewAction actionWithTitle:@"选项2" style:UIPreviewActionStyleSelected handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {        NSLog(@"2222222222");    }];    UIPreviewAction *p3 = [UIPreviewAction actionWithTitle:@"选项3" style:UIPreviewActionStyleDestructive handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {        NSLog(@"3333333333");    }];    return @[p1,p2,p3];}

最后继续重压cell,即可pop进入b控制器,并且如果采用push方式,还可以返回a