For many developers, learning Objective-C was seen as a huge barrier-to-entry.
对于很多开发人员，学习Objective - c被看作是一个巨大的障碍。
The entry barrier is extremely low, especially for a programmer who has experience with a C-like language.
入门极其容易，尤其是对于已经具有C 类语言的经验的程序员来说。
The entry barrier is extremely low, especially for a programmer who has experience with a C-like language.
入门极其容易，尤其是对于已经具有C 类语言的经验的程序员来说。
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