iOS-如何集成iOS9里的3D Touch

1.前言　　

随着6S的到来，3DTouch被各大热门APP迅速普及，博主亲自体验后，发现使用便捷性大幅提高，随后自己照着文档，写了个Demo出来，分享给大家，希望能对有需要的朋友提供有一些帮助。
2.如何使用3D Touch？　　

2.1.主界面重按APP图标，弹出Touch菜单　　

在AppleDelegate文件中的程序入口处配置：

didFinishLaunchingWithOptions

//给App图标添加3D Touch菜单//拍照//菜单图标UIApplicationShortcutIcon *iconCamera = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeAdd];//菜单文字UIMutableApplicationShortcutItem *itemCamera = [[UIMutableApplicationShortcutItem alloc] initWithType:@"1" localizedTitle:@"拍照"];//绑定信息到指定菜单itemCamera.icon = iconCamera;//相册//菜单图标UIApplicationShortcutIcon *iconPhotoLibrary = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeSearch];//菜单文字UIMutableApplicationShortcutItem *itemPhotoLibrary = [[UIMutableApplicationShortcutItem alloc] initWithType:@"2" localizedTitle:@"相册"];//绑定信息到指定菜单itemPhotoLibrary.icon = iconPhotoLibrary;//绑定到App iconapplication.shortcutItems = @[itemCamera,itemPhotoLibrary];

弹出菜单，我们需要让用户点击后跳转指定页面

这里我们会用到AppDelegate里新增加的一个方法

- (void)application:(UIApplication *)application performActionForShortcutItem:(nonnull UIApplicationShortcutItem *)shortcutItem completionHandler:(nonnull void (^)(BOOL))completionHandler;

//照相typeif ([shortcutItem.type isEqualToString:@"1"]) {    UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化    picker.allowsEditing = YES;//设置可编辑    picker.sourceType = UIImagePickerControllerSourceTypeCamera;    [self.window.rootViewController presentViewController:picker animated:YES completion:nil];//进入照相界面}//相册typeif ([shortcutItem.type isEqualToString:@"2"]) {    UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化    picker.allowsEditing = YES;//设置可编辑    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;    [self.window.rootViewController presentViewController:picker animated:YES completion:nil];//进入图片库

2.2. 3DTouch轻按预览功能，预览时底部菜单的添加　　
首先我们要把轻按预览和长按手势区分开来，这里要在初始化时做一个基本的检测。

nterface ViewController () <UIViewControllerPreviewingDelegate>{    UILongPressGestureRecognizer *_longPress;}@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    UILongPressGestureRecognizer *longPressGr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressToDo)];    _longPress = longPressGr;}//检测页面是否处于3DTouch- (void)check3DTouch{    if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {        [self registerForPreviewingWithDelegate:self sourceView:self.view];        NSLog(@"3D Touch 开启");        //长按停止        _longPress.enabled = NO;    }else{        _longPress.enabled = YES;    }}- (void)viewWillAppear:(BOOL)animated{    [self check3DTouch];}

然后我们需要实现 UIViewControllerPreviewingDelegate的协议@interface ViewController () <UIViewControllerPreviewingDelegate>//然后实现代理方法- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location;#pragma mark >> 3D touch 代理方法//轻按进入浮动预览页面- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location{    //注意这里我因为测试，没做具体的位置处理，如果需要定位到具体的图片Cell位置的话，可以用location通过tableView的convertPoint来取到指定Cell    ASPreviewViewController *vc = [[ASPreviewViewController alloc] init];    vc.view.frame = self.view.frame;    UIImageView *er = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"123.png"]];    vc.view = er;    return vc;} 完成后可以实现基本的预览效果:

最后我们加上一个预览时下滑底部菜单的添加在我们刚刚创建的预览控制器ASPreviewViewController里实现 UIViewControllerPreviewingDelegate的协议然后重写它的代理方法- (NSArray<id<UIPreviewActionItem>> *)previewActionItems;//预览页面 底部Action Items- (NSArray<id<UIPreviewActionItem>> *)previewActionItems{    UIPreviewAction *p1 =[UIPreviewAction actionWithTitle:@"分享" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {        NSLog(@"点击了分享");    }];    UIPreviewAction *p2 =[UIPreviewAction actionWithTitle:@"收藏" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {        NSLog(@"点击了收藏");    }];    NSArray *actions = @[p1,p2];    return actions;}