Question

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。

Answer 1

您无法知道安装了哪些键盘，也无法确定接下来要加载哪个键盘。

Apple的文档说明：

要求系统切换到另一个键盘，请致电 advanceToNextInputMode方法（..）系统选择合适的 “下一个”键盘;没有API来获取已启用的键盘列表或者选择要切换到的特定键盘。

有关详细信息，请阅读Apple的Custom Keyboards API文档： https://developer.apple.com/library/ios/documentation/General/Conceptual/ExtensibilityPG/Keyboard.html#//apple_ref/doc/uid/TP40014214-CH16-SW21

Answer 2

有点晚，但您可以获取设备上的活动键盘列表。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;
}

iOS 8第三方键盘识别

2 个答案: