From the learning level, ios is made of C language and android is made of Java. In China, android occupies more market than ios, so it is easier to find a job. If you use ios, the salary will be higher, but finding a job is relatively less developed than Android.
If a good programmer is a student here, when everyone first joined the company, the average salary per person was around 9k, which was about 1000 lower than that of ios engineers in Beijing. So if you plan to enter the programming industry, you can come to a good programmer to find out. The courses here can be auditioned.