undefined symbols for architecture arm64:
"_OBJCCLASS$_MCOIMAPSession", referenced from:
objc-class-ref in ViewController.o
"_OBJCCLASS$_MCOIndexSet", referenced from:
objc-class-ref in ViewController.o
"_MCORangeMake", referenced from:
-[ViewController viewDidLoad] in ViewController.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
undefined symbols for architecture arm64: "_OBJCCLASS$_MCOIMAPSession", referenced from: objc-class-ref in ViewController.o "_OBJCCLASS$_MCOIndexSet", referenced from: objc-class-ref in ViewController.o "_MCORangeMake", referenced from: -[ViewController viewDidLoad] in ViewController.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
i try to fix this problem, use this issue issue
but still cannot fix. pls help me