3DTouch的使用

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    PostsFrameModel *model = _FrameArray[indexPath.row];
    PostsCell *cell = [tableView dequeueReusableCellWithIdentifier:@"PostsCell"];
    cell.fModel=model;
    //注册3DTouch
    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;
}

<UIViewControllerPreviewingDelegate>
//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 = [_tableview indexPathForCell:(UITableViewCell* )[previewingContext sourceView]];
    //设定预览的界面
    WebViewController *web = [[WebViewController alloc]init];
    PostsModel *model = _dataArray[indexPath.row];
    web.postsUrl=model.href;
    web.tid=model.tid;
    web.tTitle=model.subject;
    web.preferredContentSize = CGSizeMake(0.0f,500.0f);
    //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 web;
}

//pop按用点力进入
- (void)previewingContext:(id <UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
    viewControllerToCommit.hidesBottomBarWhenPushed=YES;
    [self showViewController:viewControllerToCommit sender:self];
}

- (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;
}