iOS 8 第三方键盘识别



如何判断用户正在使用或切换到哪个第三方键盘?

我没有找到任何可用于检查此信息的通知或 API。

您无法知道安装了哪些键盘,也无法决定接下来要加载哪个键盘。

苹果的文件指出:

要要求系统切换到另一个键盘,请调用 前进到下一个输入模式方法 (..(系统选择适当的 "下一个"键盘;没有用于获取已启用键盘列表的 API 或用于选择要切换到的特定键盘。

有关更多信息,请阅读 Apple 的自定义键盘 API 文档:https://developer.apple.com/library/ios/documentation/General/Conceptual/ExtensibilityPG/Keyboard.html#//apple_ref/doc/uid/TP40014214-CH16-SW21

有点晚了,但您可以在设备上获取活动键盘的列表。所有键盘标识符都存储在UserDefaults中,以下是获取它们的方法:

/**
 - Author:
 Panayot Panayotov
 - returns:
 True or False
 - Important:
 Result is returned immediately after non system identifier is found
 This method iterates through all public keyboard identifiers and
 evaluates a regex that matches system keyboards
 [
     "nb_NO@sw=QWERTY-Norwegian;hw=Automatic",
     "zh_Hant-Zhuyin@sw=Zhuyin;hw=Automatic",
     "ur@sw=Urdu;hw=Automatic",
     "zh_Hant-HWR@sw=HWR-Traditional",
     "zh_Hant-Pinyin@sw=Pinyin10-Traditional;hw=Automatic",
     "emoji@sw=Emoji"
 ]
 */
-(BOOL)hasUnkownKeyboard {
    NSString * appleKeyboardsRegexp = @"^(?:[0-9a-zA-Z_\-]+)(?:@sw|@hw)[0-9a-zA-Z_\-\-;=]*$";
    NSPredicate * appleKeyboardsTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", appleKeyboardsRegexp];
    NSArray *keyboards = [[[NSUserDefaults standardUserDefaults] dictionaryRepresentation] objectForKey:@"AppleKeyboards"];
    for (NSString *keyboard in keyboards) {
        if(![appleKeyboardsTest evaluateWithObject:keyboard]){
            return YES;
        }
    }
    return NO;
}

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