Beginners should comprehend essentials of Objective-C first and then learn Swift. At first there will be demand for Objective-C since a lot of companies already

Beginners should comprehend essentials of Objective-C first and then learn Swift. At first there will be demand for Objective-C since a lot of companies already use it. But over time it should change in favour of Swift (more aggressive promotion by Apple). Swift is a replacement for Objective-C in Apple world. But that doesn't mean Objective-C is going anywhere. It has rich ecosystem and experienced developers all over the world. You can create application using both languages simultaneously which allows you to use mature libraries or frameworks in Swift. Language is a tool. Companies don't hire programmers for knowledge of specified language but for the ability to solve problems.