ios - CoreSpotlight 缩略图图像未显示在 Spotlight 搜索中

Question

我正尝试在 Core Spotlight 的帮助下让我的应用内内容可搜索。一切正常，标题和描述都出现了，但没有缩略图。

这是我正在尝试的:

CSSearchableItemAttributeSet *attributeSet = [[CSSearchableItemAttributeSet alloc]initWithItemContentType:(NSString *)kUTTypeImage];

attributeSet.title = @"My First Spotlight Search";
attributeSet.contentDescription = @"This is my first spotlight Search";

attributeSet.keywords = [NSArray arrayWithObjects:@"Hello", @"Welcome",@"Spotlight", nil];

UIImage *image = [UIImage imageNamed:@"searchIcon.png"];
NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(image)];
attributeSet.thumbnailData = imageData;

CSSearchableItem *item = [[CSSearchableItem alloc]initWithUniqueIdentifier:@"com.deeplink" domainIdentifier:@"spotlight.sample" attributeSet:attributeSet];

[[CSSearchableIndex defaultSearchableIndex] indexSearchableItems:@[item] completionHandler: ^(NSError * __nullable error) {
    if (!error)
        NSLog(@"Search item indexed");
}];

Answer 1

iOS 9 beta 1 发行说明指出缩略图还不能用于搜索结果。请参阅:https://developer.apple.com/library/prerelease/ios/releasenotes/General/RN-iOSSDK-9.0/index.html