8-11搜索相关

iOS搜索相关

项目用到search api 和 Spotlight
以下是:

search api ： NSUserActivity

在不依赖CoreSpotlight时用NSUserActivity实现搜索，必须要保证activity是强引用的，直到它被添加到索引。否则,您设置的 activity会在dealloc 的时候消失。

一：通过属性创建控制器的activity，保证activity是强引用的

二：是使用userActivity 的UIResponder属性，并重写updateUserActivityState方法

1.定义属性
@property (nonatomic, strong) NSUserActivity *userActivity;

2.添加搜索关键字
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 9.0)
    {
        //创建一个对象，这里的type用于区分搜索的类型
        self.userActivity = [[NSUserActivity alloc] initWithActivityType:@"SearchTest"];
        //显示的标题
        self.userActivity.title = @"鹿顶记-为会员提供更多、更高品质服务";
        // 搜索的关键字
        self.userActivity.keywords = [NSSet setWithArray: @[@"全球",@"新发现"]];
        // 支持Search
        self.userActivity.eligibleForSearch = YES;
        //提交设置
        [self.userActivity becomeCurrent];
    }

3.调起app
- (BOOL)application:(nonnull UIApplication *)application continueUserActivity:(nonnull NSUserActivity *)userActivity restorationHandler:(nonnull void (^)(NSArray * __nullable))restorationHandler{
    
    NSString *activityType = userActivity.activityType;
    if ([activityType isEqual:LU9_UserActivitySearch])
    {
        return YES;
    }
    return NO;
}

Spotlight

想在App中使用Spotlight,首先得引入Core Spotlight Framework，Targets ->General -> linked Frameworks and Libraries 点击加号添加CoreSpotlight.framework

导入头文件

#import 
#import 

1.关联搜索
- (void)supportSpotlightSearch {
      dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
      dispatch_async(queue, ^{
          @try {

                //创建SearchableItems的数组
                NSMutableArray *searchableItems = [[NSMutableArray alloc] initWithCapacity:你的搜索数组];
                for (模型 *akind in array) {
                    //1.创建条目的属性集合
                    CSSearchableItemAttributeSet * attributeSet = [[CSSearchableItemAttributeSet alloc] initWithItemContentType:(NSString*) kUTTypeImage];
                    
                    //2.给属性集合添加属性
                    attributeSet.title = akind.fTitle;
                    attributeSet.contentDescription = [NSString stringWithFormat:@"%@",  akind.content];
                    
                    //                attributeSet.thumbnailData = UIImagePNGRepresentation([UIImage imageNamed:[NSString stringWithFormat:@"%d.png", i+1]]);
                    //
                    //3.属性集合与条目进行关联
                    CSSearchableItem *searchableItem = [[CSSearchableItem alloc] initWithUniqueIdentifier:[NSString stringWithFormat:@"%@", akind.fid] domainIdentifier:@"SpotLight_Category" attributeSet:attributeSet];
                    
                    //把该条目进行暂存
                    [searchableItems addObject:searchableItem];
                }
             //4.吧条目数组与索引进行关联
             [[CSSearchableIndex defaultSearchableIndex] indexSearchableItems:searchableItems completionHandler:^(NSError * _Nullable error) {
                 if (!error) {
                     NSLog(@"%s, %@", __FUNCTION__, [error localizedDescription]);
                 }
             }];
         }
         @catch (NSException *exception) {
             NSLog(@"%s, %@", __FUNCTION__, exception);
         }
         @finally {
        }
     });
 }

2.调起app
- (BOOL)application:(nonnull UIApplication *)application continueUserActivity:(nonnull NSUserActivity *)userActivity restorationHandler:(nonnull void (^)(NSArray * __nullable))restorationHandler{
        NSString *uniqueIdentifier = [userActivity.userInfo objectForKey:@"kCSSearchableItemActivityIdentifier"];
         // 这下面的内容是找到导航  跳转到该页面~~~，根据自己的情况改变     
        //层层关闭，统一跳转到首页  
        [kAppDelegate.centerViewDeckController closeOpenView];
        for (UINavigationController *na in kAppDelegate.tabBarController.viewControllers)
        {
            [na popToRootViewControllerAnimated:NO];
        }
        
        [kAppDelegate.tabBarController setSelectedWithIndex:0];
        
        
        Kind *kind = [[Kind alloc] init];
        kind.fid    = uniqueIdentifier;
        kind.fTitle = userActivity.title;
        
        CategoryViewController *categoryVC = [[CategoryViewController alloc] init];
        categoryVC.kind = kind;
        [kAppDelegate.homeNavigationController pushViewController:categoryVC animated:YES];
        
        return YES;
}