//首先判斷用戶是否開啟3dTouch
self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable)
//若開啟,給當(dāng)前視圖(比如一個cell)注冊3DTouch的peek（預(yù)覽）和pop功能
// self是UIViewController
[self registerForPreviewingWithDelegate:self sourceView:cell];

//然后實現(xiàn)UIViewControllerPreviewingDelegate代理  可以封裝起來,如果APP很多地方需要用到3DTouch 直接幾行代碼搞定
//兩個代理
//peek(預(yù)覽)
- (nullable UIViewController *)previewingContext:(id <UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location
{
    //準備好要預(yù)覽的vc
      
 //設(shè)定預(yù)覽的界面
    vc.preferredContentSize = CGSizeMake(0.0f,500.0f);
    
    //調(diào)整不被虛化的范圍，按壓的那個cell不被虛化（輕輕按壓時周邊會被虛化，再少用力展示預(yù)覽，再加力跳頁至設(shè)定界面）
    CGRect rect = previewingContext.sourceView.bounds;
    previewingContext.sourceRect = rect;
    
    //返回預(yù)覽界面
    return vc;

}

//pop（按用點力進入）
- (void)previewingContext:(id <UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
    [self showViewController:viewControllerToCommit sender:self];
}