iOS9 新特征之3D Touch实现
API介绍
UITouch类里API的变化
iOS9中添加的属性
altitudeAngle
- 当笔平行于平面时,该值为0
- 当笔垂直于平面时,该值为Pi / 2
estimatedProperties
- 当前触摸对象估计的触摸特性,返回值是UITouchPropertyies
updatedProperties
- 当前触摸对象已经更新的触摸特性,返回值是UITouchPropertyies
estimationUpdateIndex
- 当每个触摸对象的触摸特性发生变化时，该值将会单独增加,返回值是NSNumber
iOS9中添加的方法
- PreciseLocationInView:当前触摸对象的坐标
- PrecisePreviousLocationInView:当前触摸对象的前置坐标
- azimuthAngleInview:沿着x轴正向的方位角,当与x轴正向方向相同时,该值为0;当view参数为nil时，默认为keyWindow
- azimuthUnitVectorInView:当前触摸对象的方向上的单位向量
当view参数为nil时，默认为keyWindow
UIForceTouchCapability
- UIForceTouchCapabilityUnknown 不能确定是否支持压力感应
- UIForceTouchCapabilityUnavailable 不能支持压力感应
- UIForceTouchCapabilityAvailable 可以支持压力感应
UITouchType
- UITouchTypeDirect 垂直的触摸类型
- UITouchTypeIndirect 非初值的触摸类型
- UITouchTypeStylus 水平的触摸类型
关于重按App icon展开菜单的实现
在项目的Appdelegate中找到如下方法，创建展开菜单
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
for example
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window makeKeyAndVisible];
UIViewController* vc = [[UIViewController alloc] initWithNibName:nil bundle:nil];
self.window.rootViewController = vc;
UIApplicationShortcutItem *item1 = [[UIApplicationShortcutItem alloc] initWithType:@"item1" localizedTitle:@"我的消息" localizedSubtitle:nil icon:nil userInfo:nil];
UIApplicationShortcutIcon *icon2 = [UIApplicationShortcutIcon iconWithType:UIApplicationShortcutIconTypeAdd];
UIApplicationShortcutItem *item2 = [[UIApplicationShortcutItem alloc] initWithType:@"item2" localizedTitle:@"发布动态" localizedSubtitle:nil icon:icon2 userInfo:nil];
UIApplicationShortcutIcon *icon3 = [UIApplicationShortcutIcon iconWithTemplateImageName:@"ico_discovery"];
UIApplicationShortcutItem *item3= [[UIApplicationShortcutItem alloc] initWithType:@"item3" localizedTitle:@"搜索寻味师" localizedSubtitle:nil icon:icon3 userInfo:nil];
application.shortcutItems = @[item3,item2,item1];
}
创建完之后就运行项目，看到效果啦，如图
image
之后可以在application:performActionForShortcutItem:completionHandler方法内根据shortcutItem.type处理点击事件
-(void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler{
for example
if ([shortcutItem.type isEqualToString:@"item1"]) {
MyMessageViewController *vc = [[MyMessageViewController alloc] init];
vc.hidesBottomBarWhenPushed = YES;
[self.navigationController.tabBarController.selectedViewController pushViewController:vc animated:YES];
}
}
关于peek 和 pop的实现
效果图
image
首先创建2个viewController,例如HomeViewController和DetailPageViewController
- HomeViewController:需要添加peek和pop的ViewController
- DetailPageViewController:要展示的View Controller
在HomeViewController中添加<UIViewControllerPreviewingDelegate>,并注册delegate
[self registerForPreviewingWithDelegate:self sourceView:self.view];
实现该Delegate的方法
-(UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)context viewControllerForLocation:(CGPoint)location
{
CGPoint point = [self.view convertPoint:location toView:self.tableView];//根据loaction获取其在不同坐标系中的点坐标，后面会通过这个取获取数据的indexPath
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:point];
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
CGRect cellRect = cell.frame;
context.sourceRect = cellRect;
Humors *humor = [(FinderInfo*)dataList[indexPath.row] humors][0];//这是我们项目的一个model，大家可以换成自己的model进行操作
DetailPageViewController *controller = [[DetailPageViewController alloc]initWithFlavorId:[humor.param intValue]];//创建需要pop的ViewController
controller.view.frame = self.view.frame;
return controller;
}
-(void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit{
[self showViewController:viewControllerToCommit sender:self];
}
效果图
image
然后在DetailPageViewController中实现peek操作
打开前面pop出的ViewController(DetailPageViewController)，在实现文件中添加如下代码
- (NSArray<id<UIPreviewActionItem>> *)previewActionItems{
__weak typeof(self) weakSelf = self;
NSString *actionTitle = mUserRes.isAttention?@"取消关注":@"＋关注";
UIPreviewAction *p1 =[UIPreviewAction actionWithTitle:actionTitle style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
[weakSelf attention]; //这里添加你需要点击后的操作
}];
UIPreviewAction *p2 =[UIPreviewAction actionWithTitle:@"取消" style:UIPreviewActionStyleDestructive handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
//这里添加你需要点击后的操作
}];
NSArray *actions = @[p1,p2];
return actions;
}
Tips:判断设备是否支持3D touch，需要做判断
- self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable
- [[[UIDevice currentDevice] systemVersion] floatValue] >= 9.0f
必须要两样同时满足，才可以使用，不作判断会引起不支持3D Touch的手机编译crash
部分内容摘自简书原地址点我
