iOS 指壓即達集成iOS9里的3D Touch的方法

2020-07-26 02:53:19

字體：大中小

來源：轉載

供稿：網友

1.前言　　

隨著6S的到來，3DTouch被各大熱門APP迅速普及，博主親自體驗后，發現使用便捷性大幅提高，隨后自己照著文檔，寫了個Demo出來，分享給大家，希望能對有需要的朋友提供有一些幫助。

2.如何使用3D Touch？　　

2.1.主界面重按APP圖標，彈出Touch菜單　　

在AppleDelegate文件中的程序入口處配置：

didFinishLaunchingWithOptions

//給App圖標添加3D Touch菜單//拍照//菜單圖標UIApplicationShortcutIcon *iconCamera = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeAdd];//菜單文字UIMutableApplicationShortcutItem *itemCamera = [[UIMutableApplicationShortcutItem alloc] initWithType:@"1" localizedTitle:@"拍照"];//綁定信息到指定菜單itemCamera.icon = iconCamera;//相冊//菜單圖標UIApplicationShortcutIcon *iconPhotoLibrary = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeSearch];//菜單文字UIMutableApplicationShortcutItem *itemPhotoLibrary = [[UIMutableApplicationShortcutItem alloc] initWithType:@"2" localizedTitle:@"相冊"];//綁定信息到指定菜單itemPhotoLibrary.icon = iconPhotoLibrary;//綁定到App iconapplication.shortcutItems = @[itemCamera,itemPhotoLibrary];

彈出菜單，我們需要讓用戶點擊后跳轉指定頁面

這里我們會用到AppDelegate里新增加的一個方法

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

讓后我們需要在這個方法里做跳轉的操作

//照相typeif ([shortcutItem.type isEqualToString:@"1"]) {  UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化 picker.allowsEditing = YES;//設置可編輯 picker.sourceType = UIImagePickerControllerSourceTypeCamera; [self.window.rootViewController presentViewController:picker animated:YES completion:nil];//進入照相界面 }//相冊typeif ([shortcutItem.type isEqualToString:@"2"]) { UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化 picker.allowsEditing = YES;//設置可編輯 picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self.window.rootViewController presentViewController:picker animated:YES completion:nil];//進入圖片庫

點擊后分別會進入相機和相冊

2.2. 3DTouch輕按預覽功能，預覽時底部菜單的添加　　

首先我們要把輕按預覽和長按手勢區分開來，這里要在初始化時做一個基本的檢測。

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

然后我們需要實現 UIViewControllerPreviewingDelegate的協議

@interface ViewController () <UIViewControllerPreviewingDelegate>

//然后實現代理方法- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location;#pragma mark >> 3D touch 代理方法//輕按進入浮動預覽頁面- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location{ //注意這里我因為測試，沒做具體的位置處理，如果需要定位到具體的圖片Cell位置的話，可以用location通過tableView的convertPoint來取到指定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;}

完成后可以實現基本的預覽效果:

最后我們加上一個

預覽時下滑底部菜單的添加

在我們剛剛創建的預覽控制器ASPreviewViewController里實現 UIViewControllerPreviewingDelegate的協議

然后重寫它的代理方法

- (NSArray<id<UIPreviewActionItem>> *)previewActionItems; //預覽頁面 底部Action Items- (NSArray<id<UIPreviewActionItem>> *)previewActionItems{ UIPreviewAction *p1 =[UIPreviewAction actionWithTitle:@"分享" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {  NSLog(@"點擊了分享"); }]; UIPreviewAction *p2 =[UIPreviewAction actionWithTitle:@"收藏" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {  NSLog(@"點擊了收藏"); }]; NSArray *actions = @[p1,p2]; return actions;}