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iOS下'3D Touch预览'的配置方法

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3D Touch预览

  1. 实现UIViewControllerPreviewingDelegate协议

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    @interface TableViewController : UITableViewController <UIViewControllerPreviewingDelegate>
    @end

  2. 注册

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    if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
        [self registerForPreviewingWithDelegate:self sourceView:self.view];
    }

  3. 补全代理方法

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    #pragma mark -  previewing Delegate
    - (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location {
        CGPoint point = [self.tableView convertPoint:location fromView:self.view];
        // 如果point在tableview中
        if (CGRectContainsPoint(self.tableView.bounds, point)) {
            NSIndexPath * indexPath = [self.tableView indexPathForRowAtPoint:point];
            if (!indexPath) {
                return nil;
            }
            UIViewController * previewController = [self.storyboard instantiateViewControllerWithIdentifier:@"UIViewController"];
            return previewController;
        }
        return nil;
    }

    - (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
        [self showViewController:viewControllerToCommit sender:self];
    }