如何使用自定义键盘扩展ios8的自动建议视图？

Question

如何在我自己的iOS8自定义键盘扩展中实现Apple的预测输入面板？

Apple的自定义键盘API Doc 自定义键盘 指出:

RequestsOpenAccessBOOL在info.plist中设置yes可以autocorrection通过UILexicon类访问基本词典.使用此类以及您自己设计的词典, suggestions以及autocorrections用户输入文本时.

但我找不到如何使用UILexicon我的自定义键盘.我将RequestsOpenAccess设置设置为YES:

但仍然无法访问自定义词典,如Apple的iOS8默认键盘这样的单词建议:

我的自定义键盘看起来像:

编辑:

我发现requestSupplementaryLexiconWithCompletion用于UILexicon class这样的我尝试使用以下代码实现这个:

 - (void)viewDidLoad {
    [super viewDidLoad];

    [self requestSupplementaryLexiconWithCompletion:^(UILexicon *appleLex) {
        appleLexicon = appleLex;
        NSUInteger lexEntryCount = appleLexicon.entries.count;

        for(UILexiconEntry *entry in appleLexicon.entries) {
            NSString *userInput = [entry userInput];
            NSString *documentText = [entry documentText];

            lable.text=userInput;
            [lable setNeedsDisplay];
        }
    }];
}

Answer 1

Finlay我做到了..!我使用sqlite静态数据库提出建议并使用类似查询得到前三个建议的工作,如下面的代码:

NSString *precedingContext = self.textDocumentProxy.documentContextBeforeInput; //here i get enter word string.



    __block NSString *lastWord = nil;

    [precedingContext enumerateSubstringsInRange:NSMakeRange(0, [precedingContext length]) options:NSStringEnumerationByWords | NSStringEnumerationReverse usingBlock:^(NSString *substring, NSRange subrange, NSRange enclosingRange, BOOL *stop) {
        lastWord = substring;
        *stop = YES;
    }];
    NSLog(@"==%@",lastWord); // here i get last word from full of enterd string

    NSString *str_query = [NSString stringWithFormat:@"select * from suggestion where value LIKE '%@%%' limit 3",lastWord];
    NSMutableArray *suggestion  = [[DataManager initDB] RETRIVE_Playlist:str_query];

    NSLog(@"arry %@",suggestion); i get value in to array using like query
    if(suggestion.count>0)
    {

        if(suggestion.count==1)
        {
            [self.ObjKeyLayout.FirstButton setTitle:[suggestion objectAtIndex:0] forState:UIControlStateNormal];

        }
        else if(suggestion.count==2)
        {
            [self.ObjKeyLayout.FirstButton setTitle:[suggestion objectAtIndex:0] forState:UIControlStateNormal];
            [self.ObjKeyLayout.secondButton setTitle:[suggestion objectAtIndex:1] forState:UIControlStateNormal];
        }
        else
        {

            [self.ObjKeyLayout.FirstButton setTitle:[suggestion objectAtIndex:0] forState:UIControlStateNormal];
            [self.ObjKeyLayout.secondButton setTitle:[suggestion objectAtIndex:1] forState:UIControlStateNormal];
            [self.ObjKeyLayout.thirdButton setTitle:[suggestion objectAtIndex:2] forState:UIControlStateNormal];
        }


    }
    else
    {

        [self.ObjKeyLayout.FirstButton setTitle:@"" forState:UIControlStateNormal];
        [self.ObjKeyLayout.secondButton setTitle:@"" forState:UIControlStateNormal];
        [self.ObjKeyLayout.thirdButton setTitle:@"" forState:UIControlStateNormal];
    }

我得到了我的键盘输出是: