3DTouch目前在手机上有两种体现方式，一种是用力按下app的图片icon，会弹出选项菜单，就像电脑上的右键。一种是在应用内的界面上用力按下，弹出的预览界面。
一、iocn按下效果
这里有两种方式实现：
1、通过plist文件静态设置
UIApplicationShortcutItemUserInfo信息
UIApplicationShortcutItemIconFile图标名称
UIApplicationShortcutItemIconType图标类型
UIApplicationShortcutItemTitle标题
UIApplicationShortcutItemSubTitle副标题
然后在AppDelegate里面实现代理方法，通过绑定的标签type来实现具体代码。
-(void)application:(UIApplication*)applicationperformActionForShortcutItem:(UIApplicationShortcutItem*)shortcutItemcompletionHandler:(void(^)(BOOL))completionHandler{
UINavigationController*nav = (UINavigationController*)self.window.rootViewController;
if([shortcutItem.typeisEqualToString:@"ONE"]){
UIViewController*vc = [[UIViewControlleralloc]init];
vc.title=@"第一个";
vc.view.backgroundColor= [UIColorredColor];
[navpushViewController:vcanimated:YES];
}elseif([shortcutItem.typeisEqualToString:@"TWO"]){
UIViewController*vc = [[UIViewControlleralloc]init];
vc.title=@"第二个";
vc.view.backgroundColor= [UIColorgreenColor];
[navpushViewController:vcanimated:YES];
}
}
2、通过代码动态创建
首先在AppDelegate的didFinishLaunchingWithOptions里面初始化
- (BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
[selfsetup3DTouch:application];
returnYES;
}
- (void)setup3DTouch:(UIApplication*)application{
/**
type 该item 唯一标识符
localizedTitle ：标题
localizedSubtitle：副标题
icon：icon图标 可以使用系统类型 也可以使用自定义的图片
userInfo：用户信息字典 自定义参数，完成具体功能需求
*/
// UIApplicationShortcutIcon *icon1 = [UIApplicationShortcutIcon iconWithTemplateImageName:@"标签.png"];
UIApplicationShortcutIcon *cameraIcon = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeCompose];
UIApplicationShortcutItem *cameraItem = [[UIApplicationShortcutItem alloc]initWithType:@"ONE" localizedTitle:@"拍照" localizedSubtitle:@"" icon:cameraIcon userInfo:nil];
UIApplicationShortcutIcon *shareIcon = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeShare];
UIApplicationShortcutItem *shareItem = [[UIApplicationShortcutItem alloc] initWithType:@"TWO" localizedTitle:@"分享" localizedSubtitle:@"" icon:shareIcon userInfo:nil];
/** 将items 添加到app图标 */
application.shortcutItems = @[cameraItem,shareItem];
}
//最后在代理方法里面实现具体需求代码
-(void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler{
if([shortcutItem.type isEqualToString:@"ONE"]){
NSLog(@"第一个");
}else if ([shortcutItem.type isEqualToString:@"TWO"]){
NSLog(@"第二个");
}
}
二、应用内UI界面用力按下产生的3DTouch效果（这种方式也有两种实现效果）
比如用力按下某个cell，弹出预览的小视图，同时上滑底部出现若干个选项（Peek功能）。
首先注册需要实现Touch效果的View，判断下设备系统支不支持，不然会崩溃
- (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];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.text = self.dataArray[indexPath.row];
if ([self respondsToSelector:@selector(traitCollection)]) {
if ([self.traitCollection respondsToSelector:@selector(forceTouchCapability)]) {
if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
[self registerForPreviewingWithDelegate:self sourceView:cell];
}}}
return cell;
}
把当前的cell注册绑定，然后试图界面实现UIViewControllerPreviewingDelegate代理
#pragma mark - UIViewControllerPreviewingDelegate
//Peek代理方法
//1、弹出预览效果
-(UIViewController *)previewingContext:(id)previewingContext viewControllerForLocation:(CGPoint)location{
NSIndexPath *index = [self.tableView indexPathForCell:(UITableViewCell *)[previewingContext sourceView]];
NSString *title = self.dataArray[index.row];
Touch3DShowViewController *showVC = [[Touch3DShowViewController alloc]init];
showVC.string = title;
CGRect rect = CGRectMake(0, 0, previewingContext.sourceView.frame.size.width, previewingContext.sourceView.frame.size.height);
previewingContext.sourceRect = rect;
return showVC;
}
//pop代理方法
//2、在第1个效果的基础上，再继续用力按下去，就会push预览界面了。（pop功能）-(void)previewingContext:(id)previewingContext commitViewController:(UIViewController *)viewControllerToCommit{
[self showViewController:viewControllerToCommit sender:self];
}
如果实现下面有几个选项的功能，需要在你预览界面里面（弹出的那个界面）实现一个方法，
- (NSArray> *)previewActionItems{
UIPreviewAction *action0 = [UIPreviewAction actionWithTitle:@"0普通的按钮" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
//添加点击处理操作
}];
UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@"1取消" style:UIPreviewActionStyleDestructive handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
}];
UIPreviewAction *action2 = [UIPreviewAction actionWithTitle:@"2选中" style:UIPreviewActionStyleSelected handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
}];
UIPreviewAction *action3 = [UIPreviewAction actionWithTitle:@"3选中" style:UIPreviewActionStyleSelected handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
}];
return @[action0, action1, action2, action3];
// //该按钮可以是一个组,点击该组时,跳到组里面的按钮.
// UIPreviewActionGroup *actionGroup = [UIPreviewActionGroup actionGroupWithTitle:@"按钮数组/剩下的按钮" style:UIPreviewActionStyleDefault actions:@[action2, action3]];
//直接返回数组.
// return @[action0,action1,actionGroup];
}
如果在别的控件上添加3DTouch，则需要在此控件上注册，剩下的不变。栗子🌰：button添加3DTouch：
UIButton *buton = [UIButton buttonWithType:UIButtonTypeCustom];
buton.frame = CGRectMake(50, 50, 200, 30);
buton.backgroundColor = [UIColor redColor];
[buton setTitle:@"3DTouch测试" forState:UIControlStateNormal];
[buton addTarget:self action:@selector(addTimerView) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:buton];
if ([self respondsToSelector:@selector(traitCollection)]) {
if ([self.traitCollection respondsToSelector:@selector(forceTouchCapability)]) {
if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
[self registerForPreviewingWithDelegate:self sourceView:buton];
}}}
bug记录：
如果cell是多样式的，有的cell需要3DTouch，有的不需要，此时注册绑定cell会出现问题。解决方法是：在当前的ViewController里定义一个全局的字典，key是cell，value是context，每次先判断这个cell有没有添加过，有的话取消，然后在判断需不需要添加。因为取消的时候不是传的cell，需要传id<UIViewControllerPreviewing>这个，就是注册时候的返回值，所以要用字典把cell和id<UIViewControllerPreviewing>这个绑定起来。
