3Dtouch 基本原理

1. UIApplicationShortcutItems即用3Dtouch在app图标呼出一个菜单

   

  实现由两种方法：静态菜单和动态菜单

  静态菜单是在plist中添加，优点是在第一次打开app前就生效

   

  动态菜单是用代码生成，缺点是在第一次打开app前无法生效故不做演示

  实现点击菜单直接打开指定控制器  

- ( void )application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:( void  (^)( BOOL ))completionHandler
{
    if  ([shortcutItem.localizedTitle isEqualToString:@ "我的二维码" ]) {
        //跳转到第一个tabbar
        self.rootTabbarCtr.selectedIndex = 0;
        JYTwoDimensionCodeViewController *vc = [[JYTwoDimensionCodeViewController alloc]init];
        vc.hidesBottomBarWhenPushed = YES;
        [self.homeViewController.navigationController pushViewController:vc animated:NO];
    }
    else  if ([shortcutItem.localizedTitle isEqualToString:@ "扫一扫" ]){
        //跳转到第一个tabbar
        self.rootTabbarCtr.selectedIndex = 0;
        JYScanViewController *vc = [[JYScanViewController alloc]init];
        vc.hidesBottomBarWhenPushed = YES;
        [self.homeViewController.navigationController pushViewController:vc animated:NO];
    }
}

2.peek和pop

 //实现peek和pop手势：

 //1、遵守协议 UIViewControllerPreviewingDelegate

 //2、注册    [self registerForPreviewingWithDelegate:self sourceView:self.view];

 //3、实现代理方法

  遵守协议

@interface JYMoreViewController ()<UITableViewDelegate,UITableViewDataSource,UIViewControllerPreviewingDelegate>

  //peek，pop相关属性

@property (nonatomic, assign) CGRect sourceRect;
@property (nonatomic, strong) NSIndexPath *selectedPath;

  注册

- ( void )viewDidLoad {
    [super viewDidLoad];
    //注册pop，peek方法
    [self registerForPreviewingWithDelegate:self sourceView:self.view];
}

  实现peek，pop方法

//peek手势
- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint) location
{
    // 获取用户手势点所在cell的下标。同时判断手势点是否超出tableView响应范围。
    if  (![self getShouldShowRectAndIndexPathWithLocation:location])  return  nil;

    //弹出视图的初始位置，sourceRect是peek触发时的高亮区域。这个区域内的View会高亮显示，其余的会模糊掉
    previewingContext.sourceRect = self.sourceRect;

    UIViewController *childVC = [[JYPopViewController alloc] init];
    return  childVC;
}

//pop手势
- ( void )previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit
{
    viewControllerToCommit.hidesBottomBarWhenPushed = YES;
//    [self tableView:self.moreTableView didSelectRowAtIndexPath:self.selectedPath];
    [self showViewController:viewControllerToCommit sender:nil];
}

//获取用户手势点所在cell的下标，同时判断手势点是否超出tableview的范围
- ( BOOL )getShouldShowRectAndIndexPathWithLocation:(CGPoint)location {
    //坐标点的转化
    NSInteger row = (location.y - 20)/44;
    self.sourceRect = CGRectMake(0, row * 44 + 20, [UIScreen mainScreen].bounds.size.width, 44);
    self.selectedPath = [NSIndexPath indexPathForItem:row inSection:0];
    // 如果row越界了，返回NO 不处理peek手势
    NSLog(@ "当前所在的行---%zd" ,self.selectedPath.row);
    return  (self.selectedPath.row > 5) ? NO : YES;
}

  实现peek上拉菜单

  //在peek打开的控制器里遵守协议

@interface JYPopViewController ()<UIViewControllerPreviewingDelegate>

  //设置菜单项

//peek上拉菜单
- (NSArray<id<UIPreviewActionItem>> *)previewActionItems
{
    UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@ "确认"  style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@ "点击了确认" );
    }];
    UIPreviewAction *action2 = [UIPreviewAction actionWithTitle:@ "取消"  style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@ "点击了取消" );
    }];
    NSArray *actions =@[action1,action2];
    return  actions;
}