3D Touch

苹果在iPhone6s和iPhone6s Plus中加入了3D Touch技术，其实Apple Watch的屏幕上很早就用到这一技术了，并不新颖，由于本人刚买的iPhone6s，所以试玩一下。没有6S和6SP的小伙伴也不要抱怨，好东西来了：SBShortcutMenuSimulator,能让模拟器支持HomeScreen Quick Action。赶紧去尝试吧~

SBShortcutMenuSimulator

1.编译：在终端依次输入下面的命令

git clone https://github.com/DeskConnect/SBShortcutMenuSimulator.git

cd SBShortcutMenuSimulator

make

2.让SpringBoard支持SBShortcutMenuSimulator

xcrun simctl spawn booted launchctl debug system/com.apple.SpringBoard --environment DYLD_INSERT_LIBRARIES=$PWD/SBShortcutMenuSimulator.dylib

xcrun simctl spawn booted launchctl stop com.apple.SpringBoard

3.预览：

echo 'com.apple.mobilecal' | nc 127.0.0.1 8000

注意：'com.apple.mobilecal' 是系统自带日历的BundleID，记得要换成自己的喔~

Home Screen Quick Action

预览图1.png
创建Quick Action分为静态和动态两种方式：动态就是代码实现，但是程序要运行一次才会有效果；静态就是通过程序的Info.plist文件来设置。
动态实现的代码如下：

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

    UIApplicationShortcutIcon *addIcon = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeAdd];
    UIApplicationShortcutIcon *shareIcon = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeShare];
    UIApplicationShortcutIcon *searchIcon = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeSearch];
    
    UIApplicationShortcutItem *item0 = [[UIApplicationShortcutItem alloc] initWithType:@"1" localizedTitle:@"添加" localizedSubtitle:nil icon:addIcon userInfo:nil];
    UIApplicationShortcutItem *item1 = [[UIApplicationShortcutItem alloc] initWithType:@"2" localizedTitle:@"分享" localizedSubtitle:nil icon:shareIcon userInfo:nil];
    UIApplicationShortcutItem *item2 = [[UIApplicationShortcutItem alloc] initWithType:@"3" localizedTitle:@"搜索" localizedSubtitle:nil icon:searchIcon userInfo:nil];
    
    NSArray *itemArray = [NSArray arrayWithObjects:item0,item1,item2, nil];
    
    [[UIApplication sharedApplication] setShortcutItems:itemArray];
    
    return YES;
}

响应回调：

- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler
{
    if ([shortcutItem.localizedTitle isEqualToString:@"1"]) {
        NSLog(@"添加");
    }else if ([shortcutItem.localizedTitle isEqualToString:@"2"]){
        NSLog(@"分享");
    }else if([shortcutItem.localizedTitle isEqualToString:@"3"]){
        NSLog(@"搜索");
    }
}

特别注意：
**1.每个APP最大支持4个Action Item；
2.静态动态同时设置的时候，不会覆盖；
**

UIKit Peek & Pop

短时间按压屏幕可以实现预览，这就是peek，再用力按压，直接进到另一个页面，就是Pop了。要实现Peek和Pop功能，首先要判断设备是否支持3D Touch功能，然后遵守UIViewControllerPreviewingDelegate，并实现它仅有的两个方法：

delegateMethods.png

监测3D Touch:

我们可以在viewWillAppear方法里检测：

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
        NSLog(@"3D Touch 可用");
    }else if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityUnavailable){
        NSLog(@"3D Touch 不可用");
    }else{
        NSLog(@"3D Touch 未检测");
    }
}

如果程序内修改了3D Touch设置，我们通过traitCollectionDidChange来检测：

//生命周期内可以通过这个方法重新检测3D Touch功能
- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection
{
    if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
        //功能可用的情况下进行注册
        [self registerForPreviewingWithDelegate:self sourceView:self.tableView];
        NSLog(@"已注册");
    }else{
        NSLog(@"没注册");
    }
}

实现UIViewControllerPreviewingDelegate的代理方法：

#pragma mark - viewcontrollerPrewingdelegate
//Peek 代理方法：
- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location
{
    //防止重复弹出
    if ([self.presentationController isKindOfClass:[PeekViewController class]]) {
        return nil;
    }else{
        //找到正在按压的cell，从而着重显示，
        NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
        UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
        if (!cell) {
            return nil;
        }
        previewingContext.sourceRect = cell.frame;
        PeekViewController *peekVC = [[PeekViewController alloc] initWithNibName:@"PeekViewController" bundle:nil];
        peekVC.preferredContentSize = CGSizeMake(0, 0);
        return peekVC;
    }
}
//Pop 代理方法：
- (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit
{
    PeekViewController *peekVC = [[PeekViewController alloc] initWithNibName:@"PeekViewController" bundle:nil];
    peekVC.sendData = @"from POP";
    [self presentViewController:peekVC animated:YES completion:nil];   
}

你可能见过类似的效果:

peek_quick_actions_2x.png

那么底下的这些选项又是怎么实现的呢？这个呢，需要在目标控制器里设置，也就是说，如果你的A控制器实现了上面的代理方法，然后想跳到B控制器，那么这些选项的设置就要在B控制器里通过UIPreviewAction来设置。

//初始化preViewActionsItems
- (NSArray<id<UIPreviewActionItem>> *)previewActionItems
{
    UIPreviewAction *action0 = [UIPreviewAction actionWithTitle:@"取消关注" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@"取消关注");
    }];
    UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@"删除" style:UIPreviewActionStyleDestructive handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@"删除");
    }];
    NSArray *previewActionItemsArray = @[action0,action1];
    return previewActionItemsArray;
}

OK~终于大功告成了。

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