ios - 代理(Delegate) no know instance method for selector ""

Question

Answer 1

Use weak when declaring a proxy

Answer 2

The tabBarDidClickAddBtn: method is not declared in the protocol that self.delegate complies with, just declare it

Answer 3

The error report has made it very clear: there is no tabBarDidClickAddBtn: method in the class corresponding to your self.delegate.

If you want to bypass it, you can try [self.delegate performSelector:@selector(tabBarDidClickAddBtn:) withObject:self].