Personally, I think programming itself is just a tool, but what you need to know more is the application level. Such as various protocols, standards and their code implementation methods.

For example, if you know OC, it means that you can write code, but can you use so many libraries in languages such as C and C+? What do you know about them? If you are asked to write a graphical interface program, can you skillfully call qt, opengl, libjpeg, libxml, etc?

I recommend you to go to Chengdu Ruifeng iOS training institution, the training center officially authorized by Apple, which can at least guarantee your salary of 6,000 after completion.

Generally speaking, as a programmer, knowing algorithms and writing codes is the most basic, but not enough.

Personally, I suggest not to look for a job blindly now. It is best to attend an iOS training. Some things are really hard to learn by yourself. If a teacher teaches you, you can learn real application development and apply it to the project to become a qualified iOS development engineer!