闲来没事，就看了看3D Touch,写了个Demo,下面就简单介绍下如何实现这些功能。
网上教程说要在info.plist文件写快捷选项标签，我试了下不写，发现功能依旧能够实现，说说我的做法吧。
快捷功能
1.创建快捷选项
在Appdelegate.m文件中的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions方法中添加一个方法来创建3D Touch的快捷选项，即Demo的[self addShortcutItem]方法,实现如下:
//创建系统风格的icon
UIApplicationShortcutIcon *icon1 = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeSearch];
UIApplicationShortcutIcon *icon2 = [UIApplicationShortcutIcon iconWithTemplateImageName:@"icon_2"];
//创建快捷选项
UIApplicationShortcutItem * item1 = [[UIApplicationShortcutItem alloc]initWithType:@"NSLog-ok" localizedTitle:@"系统图标" localizedSubtitle:nil icon:icon1 userInfo:nil];
UIApplicationShortcutItem * item2 = [[UIApplicationShortcutItem alloc]initWithType:@"NSLog-hello" localizedTitle:@"自定义图标" localizedSubtitle:nil icon:icon2 userInfo:nil];
//添加到快捷选项数组
[UIApplication sharedApplication].shortcutItems = @[item1,item2];
2.实现快捷选项功能
依旧在Appdelegate.m文件中，添加系统方法
- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler {
//根据不同标识执行不同操作
if([shortcutItem.type isEqualToString:@"NSLog-ok"]){
NSLog(@"ok");
}
if([shortcutItem.type isEqualToString:@"NSLog-hello"]){
NSLog(@"hello");
}
if (completionHandler) {
completionHandler(YES);
}
}
这样，快捷键功能就实现了，是不是很简单〜
peek（预览）和pop（跳至预览界面）功能
1.注册peek和pop功能(遵循UIViewControllerPreviewingDelegate协议)
在-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath方法中增加注册代码：
if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {
//3D Touch可用，注册peek和pop功能
[self registerForPreviewingWithDelegate:self sourceView:cell];
} else {
//3D Touch 无效
}
2.实现peek和pop功能
2.1.1添加peek功能
//peek(预览)
- (nullable UIViewController *)previewingContext:(id <UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location
{
//获取按压的cell所在行，[previewingContext sourceView]就是按压的那个cell
NSIndexPath *indexPath = [_myTableView indexPathForCell:(UITableViewCell* )[previewingContext sourceView]];
//预览的界面
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
PeekAndPopViewController *peekVC = [storyboard instantiateViewControllerWithIdentifier:@"PeekAndPopViewController"];
peekVC.name = [NSString stringWithFormat:@"你点的是第%ld个cell",indexPath.row];
peekVC.preferredContentSize = CGSizeMake(0.0f,500.0f);//设置预览界面的Size
//设置不被虚化的rect（轻轻按压时周边会被虚化，再少用力展示预览，再加力跳页至设定界面）
CGRect rect = CGRectMake(0, 0, self.view.frame.size.width,60);
previewingContext.sourceRect = rect;
return peekVC;
}
2.1.2添加预览界面的ActionSheet
- (NSArray<id<UIPreviewActionItem>> *)previewActionItems {
// setup a list of preview actions
UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@"Aciton1" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
//fountion
}];
UIPreviewAction *action2 = [UIPreviewAction actionWithTitle:@"Aciton2" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
//fountion
}];
NSArray *actions = @[action1,action2];
return actions;
}
2.2实现pop功能
//pop（用力按页面跳转）
- (void)previewingContext:(id <UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
[self showViewController:viewControllerToCommit sender:self];
}
在这里需要说明的一点是，跳转到预览页面，可用[self dismissViewControllerAnimated:YES completion:nil];方法返回
测算点击力度功能
//按住移动or压力值改变时的回调
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
NSArray *arrayTouch = [touches allObjects];
UITouch *touch = (UITouch *)[arrayTouch lastObject];
if (touch.view == self.view) {
//显示压力值
_pressureLabel.text = [NSString stringWithFormat:@"压力值:%f",touch.force];
}
}
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
_pressureLabel.text = nil;
}
具体效果可以看Demo,Demo地址:3D Touch-Demo
