Earlier before iOS 7, UITextView uses the web-kit under the hood to render the input by HTML, when we give attributed text. But for many other customisations for many number of lines and complicated functionality, Core-Text is the option left for developers.Core-Text : Core-Text is a low level frame work which resides on top of the Core-Graphics framework in iOS kernel. In other words, Core-Text is a low level Text-engine that when we use along side the Core-Graphics/Quartz frameworks, gives the fine -grained control over layout and formatting.Text-Kit :With iOS 7, Apple released a high level library called Text-Kit, Which is one layer above the Core-Text, and interacts with core text behind the hoods. So developers can avail of this new library(Text-Kit) APIs, for customising the layouts and formats in their App designs. It inherits all the main functionalities of core text and wraps them into objects to provide the needed APIs for the developers.In the need of modifying text details, such as font or layout attributes, one had to deal with Core Text, a powerful framework, yet hard to work with.


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