3D Touch

//1，桌面重压app图标
/**需要在info.plist中进行配置
    添加：UIApplicationShortcutItems   (数组，元素是字典，多个title就多个item)；
    字典中有5个key，
    必要的(required)：
    UIApplicationShortcutItemType：唯一标识的字符串，用来在代码中进行判断点击的哪个title
    UIApplicationShortcutItemTitle：标题
    可选的(optional)
    UIApplicationShortcutItemSubtitle：子标题，显示在title下面，如果指定了subtitle，title只会显示一行，显示不下的以...的形式显示
    UIApplicationShortcutItemIconFile：图片名字(自定义)
    UIApplicationShortcutItemIconType:枚举，系统自带的图片，包括：UIApplicationShortcutIconTypeCompose之类的，可以点进去看的,或者参考http://blog.youkuaiyun.com/baidu_32469997/article/details/51192500
    UIApplicationShortcutItemUserInfo：字典类型，具体用处不清楚
*/
//在APPDelegate中
- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler {//这里根据UIApplicationShortcutItemType来判断要做的动作
    if ([shortcutItem.type isEqualToString:@"share"]) {
        UIButton *btn = [[UIButton alloc]initWithFrame:[UIScreen mainScreen].bounds];
        [btn setImage:[UIImage imageNamed:@"shareLogo"] forState:UIControlStateNormal];
        [[[UIApplication sharedApplication] keyWindow] addSubview:btn];
        [btn setBackgroundColor:[UIColor whiteColor]];
        btn.imageView.contentMode = UIViewContentModeScaleAspectFit;
        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    }
    else if ([shortcutItem.type isEqualToString:@"dianij"]) {
        NSLog(@"share");
    }
}

//例：
    <key>UIApplicationShortcutItems</key>
    <!--数组,可以设置多个选项-->
    <array>
        <dict>
            <!--图片，暂时是纯黑的，可以空心-->
            <key>UIApplicationShortcutItemIconFile</key>
            <string>wt_unity_refreshing</string>
            <!--标题-->
            <key>UIApplicationShortcutItemTitle</key>
            <string>标题</string>
            <!--唯一标识的字符串，用来在代码中进行判断-->
            <key>UIApplicationShortcutItemType</key>
            <string>dianji</string>
        </dict>
        <dict>
            <!--唯一标识的字符串，用来在代码中进行判断-->
            <key>UIApplicationShortcutItemType</key>
            <string>share</string>
            <!--标题-->
            <key>UIApplicationShortcutItemTitle</key>
            <string>选择</string>
            <!--图片-->
            <key>UIApplicationShortcutItemIconFile</key>
            <string>wt_unity_shareLogo</string>
        </dict>
    </array>

//二.在viewController中使用3D Touch
//1.控制器注册成为3DTouch响应
[self registerForPreviewingWithDelegate:self sourceView:_tableView];
//2.实现 UIViewControllerPreviewingDelegate 协议
- (nullable UIViewController *)previewingContext:(id <UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location {

    //location是相对于previewingContext.sourceView的view中的位置
    UITableView *table = (UITableView *)previewingContext.sourceView;
    //这是目前我能想到的一个确定点击哪个cell的方法，如果cell高度不固定暂时还不知道怎么弄 ,
    UITableViewCell *cell =[table cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:(NSInteger)location.y/cellHeight]];

    SecondViewController *secondVC = [[SecondViewController alloc]init];
    [secondVC.titleLable setText:cell.textLabel.text];
    //要有上滑手势还需要在secondViewController中重写 - (NSArray<id<UIPreviewActionItem>> *)previewActionItems 方法
    return secondVC;

}
- (void)previewingContext:(id <UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
    [self showViewController:viewControllerToCommit sender:self];
}

//3.SecondViewController中重写 - (NSArray<id<UIPreviewActionItem>> *)previewActionItems方法
- (NSArray<id<UIPreviewActionItem>> *)previewActionItems {
//三个type可以自己都试一下看看效果
    UIPreviewAction *action1 = [UIPreviewAction actionWithTitle:@"title1" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@"title1");
    }];
    UIPreviewAction *action2 = [UIPreviewAction actionWithTitle:@"title2" style:UIPreviewActionStyleSelected handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@"selected");
    }];
    UIPreviewAction *action3 = [UIPreviewAction actionWithTitle:@"title3" style:UIPreviewActionStyleDestructive handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
        NSLog(@"销毁");//UIPreviewActionStyleDestructive应该是默认字体颜色是红色
    }];

    return @[action1, action2, action3];
}