UITextChecker spell-checks are using a lexicon for a given language. IOS is using the class UITextChecker, an object used to check a string (usually the text of a document) for misspelled words, commonly known as Apple's autocorrection. Based on provided text, the session object returns spelling suggestions generated by the spelling checker. The framework is one of the Text Service APIs offered by the Android platform. The Android platform offers a spelling checker framework that offers the possibility to implement and access spell checking in the application itself. Next to the classic virtual keyboard implementation Android, iOS and custom keyboards, such as SwiftKey for example, are providing different features to improve the usability and the efficiency of their keyboards.Īutocorrection and spelling checker This controller provides different methods for the implementation of a custom keyboard, such as a user interface for a custom keyboard, obtaining a supplementary lexicon or changing the primary language of a custom keyboard. The UIInputViewController is the primary view controller for a custom keyboard app extension. Further iOS is automatically switching between system and custom keyboards, if the user enters text into the text input field. Apple's virtual keyboard design pattern has become a standard on mobile devices today.īoth most common mobile operating systems, Android and iOS, give the developer community the possibility to individually develop custom virtual keyboards.Īpple also provides the possibility for the community to develop custom keyboards, but does not give any access to the dictionary or general keyboard settings. But Apple brought the multi-touch technology into their new device, which enabled them to overcome the usability problems of PDAs. When Apple presented the first iPhone in 2007, the decision not to include a physical keyboard was seen as a detriment to the device. The main problem that early PDAs faced was support for multi-touch technology, and as a result, usability problems for the user. Microsoft's mobile operating system approach was to simulate a complete functional keyboard, which resulted in a slightly overloaded keyboard layout. Many early PDAs were not primarily focused on virtual keyboards. The four main approaches to enter text into a PDA were: virtual keyboards operated by a stylus, external USB keyboards, handwritten keyboards, and stroke recognition. Virtual keyboards are also used as features of emulation software for systems that have fewer buttons than a computer keyboard would have. Text is commonly inputted either by tapping a virtual keyboard or finger-tracing. Virtual keyboards are commonly used as an on-screen input method in devices with no physical keyboard, where there is no room for one, such as a pocket computer, personal digital assistant (PDA), tablet computer or touchscreen-equipped mobile phone. Multitouch screens allow the possibility to create virtual chorded keyboards for tablet computers, touchscreens, touchpads and wired gloves. On the Internet, various JavaScript virtual keyboards have been created, allowing users to type their own languages on foreign keyboards, particularly in Internet cafes. Depending on which device the keyboard is used ( desktop / mobile / virtual reality / augmented reality).Online virtual keyboards for multiple languages that don't require OS settings change.Optically detected human hand and finger motions.Optically projected keyboard layouts or similar arrangements of "keys" or sensing areas.Keyboard software may include a number pad feature to facilitate typing numbers.Character variants, punctuation, and other special characters accessible through a menu and through holding buttons.Virtual keyboards with touchscreen keyboard layouts or sensing areas.Virtual keyboards can be categorized by the following aspects: Cyrillic/Latin letters in various national layouts), the on-screen keyboard provides a handy substitute while working at different stations or on laptops, which seldom come with dual layouts. Although hardware keyboards are available with dual keyboard layouts (e.g. On a desktop computer, a virtual keyboard might provide an alternative input mechanism for users with disabilities who cannot use a conventional keyboard, or for bi- or multi-lingual users who switch frequently between different character sets or alphabets, which may be confusing over time. The interaction with the virtual keyboard happens mostly via a touchscreen interface, but can also take place in a different form in virtual or augmented reality. A virtual keyboard is a software component that allows the input of characters without the need for physical keys.
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