ios - How to add a shift key to an iOS 8 Custom Keyboard

Question

Right now I have created a basic prototype custom keyboard, however, I do not know how to make a shift key that would capitalize the letters. Right now the letters are all lowercase. Also I wrote this in Objective-C not Swift, but a swift based solution is welcome as well! :) Thank you

Answer 1

制作一个可以在您使用的任何图像之间切换的键。当键切换到 shift 时，将其存储在布尔属性中。

然后，为每次按键使用此代码：

- (NSString *)stringForAKeyPress:(id)sender {
   if (self.shifted) {
       return @"A";
   } else {
       return @"a";
   }
}