上一篇3D touch中有很多不足之处,今天我再补充一些.
用过3dtouch的朋友都知道,按压图标后会出来几个item,点击任意一个item后会进入到不同的页面,还有进入程序后第一次重压会有个上拉的动作,并会出现几个选项.今天就来实现这2个功能.

在AppDelegate里面:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    ViewController *vc = [[ViewController alloc]init];
    UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc];
    _window.rootViewController = nav;
    [_window makeKeyAndVisible];
    UIApplicationShortcutItem *item1 = [[UIApplicationShortcutItem alloc]initWithType:@"搜索" localizedTitle:@"搜索"];
    UIApplicationShortcutItem *item2 = [[UIApplicationShortcutItem alloc]initWithType:@"第二页" localizedTitle:@"第二页"];
    NSArray *shortItems = @[item1,item2];
    [[UIApplication sharedApplication]setShortcutItems:shortItems];
    return YES;
}

这里没什么问题,很简单,就是按压图标后出现2个item,重点是点击item后实现push到具体的界面.请看下面:

-(void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler
{
    if ([shortcutItem.localizedTitle isEqual:@"搜索"]) {
        ViewController *vc = [[ViewController alloc]init];
        UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc];
        _window.rootViewController = nav;
        [_window makeKeyAndVisible];
        SearchView *sv = [[SearchView alloc]init];
        [sv.searchBar becomeFirstResponder];
        [nav pushViewController:sv animated:YES];
    }
    else if([shortcutItem.localizedTitle isEqual:@"第二页"])
    {
        ViewController *vc = [[ViewController alloc]init];
        UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc];
        _window.rootViewController = nav;
        [_window makeKeyAndVisible];
        SecondViewController *sv = [[SecondViewController alloc]init];
        [nav pushViewController:sv animated:YES];
    }
}

这个方法是专门为3DTouch所用的,参数shortcutItem就是具体点击的那个item,通过判断它的localizedTitle来跳转到不同的界面.
如图:

点击不同item进入不同界面

下面是重压后上拉动作.
首先,我们在Viewcontroller里面创建一个tableView,并让他拥有简单的3DTouch效果,代码如下:

#import "ViewController.h"
#import "SearchView.h"
#import "SecondViewController.h"
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate,UIViewControllerPreviewingDelegate>
@property(nonatomic, strong)UITableView *tableView;
@property(nonatomic, strong)NSArray *cellArray;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    self.title = @"第一页";
    _tableView = [[UITableView alloc]initWithFrame:self.view.frame];
    _tableView.delegate = self;
    _tableView.dataSource = self;
    _cellArray = @[@"第一页",@"第二页",@"搜索"];
    [self.view addSubview:_tableView];
}

-(CGFloat )tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 40;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return _cellArray.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (!cell) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
    }
    [self registerForPreviewingWithDelegate:self sourceView:cell];

    cell.textLabel.text = _cellArray[indexPath.row];
    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row == 1) {
        [self.navigationController pushViewController:[[SecondViewController alloc]init] animated:YES];
    }
    else if(indexPath.row == 2)
    {
        [self.navigationController pushViewController:[[SearchView alloc]init] animated:YES];
    }
}

-(UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location
{
    NSIndexPath *indexPath = [_tableView indexPathForCell:(UITableViewCell* )[previewingContext sourceView]];
    if (indexPath.row == 0) {
        ViewController *vc = [[ViewController alloc]init];
        vc.preferredContentSize = CGSizeMake(0.0f, 600.0f);
        return vc;
    }
    else if (indexPath.row == 1)
    {
        SecondViewController *svc = [[SecondViewController alloc]init];
        svc.preferredContentSize = CGSizeMake(0, 600);
        return svc;
    }
    else
    {
        SearchView *searchVC = [[SearchView alloc]init];
        searchVC.preferredContentSize = CGSizeMake(0, 600);
        return searchVC;
    }
}

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

现在的效果是这样:

怎么实现上拉效果呢.是这样的,比如第二页有个上拉效果,那么我们在具体的页面写个方法就可以了,也就是在SecondViewcontroller.m里面写这个方法:

-(NSArray<id<UIPreviewActionItem>> *)previewActionItems
{
    UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@"进去" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        SecondViewController *vc = [[SecondViewController alloc]init];
        ViewController *viewcontroller = [[ViewController alloc]init];
        UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:viewcontroller];
        [UIApplication sharedApplication].keyWindow.rootViewController =  nav;
        [[UIApplication sharedApplication].keyWindow makeKeyAndVisible];
        [nav pushViewController:vc animated:YES];
    }];
    UIPreviewAction *action2 = [UIPreviewAction actionWithTitle:@"取消" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        
    }];
    NSArray *array = @[action1,action2];
    return array;
}

这样,第一次重压第二页出现绿色小框后再上拉会出现"进去"和"取消"两个选项.同理,在searchView里面也是这样,第一页没有上拉,所以当第一次重压第一页后上面没有上拉的箭头.大家看看效果图吧: