我如何从uiviewcontroller加载类中的thats方法

NSObject Class dbAccess.h
- (void)passCode:(NSString *)passedCode;

NSObject Class.m
- (void)passCode:(NSString *passedCode {
     myString = passedCodeVaraibel; //myString declared in .h
}

    viewController.m
    //pass myCode textfield string when uitableviewcell is selected.

[dbAccess.passCode myCode.text];

setPassCode:

passCode:

[target action:argument];
[target action:arg1 anotherParameter:arg2];
[target action]

// DBAccess.m
- (void)setPassCode:(NSString *)newPassCode {
   myString = newPassCode; // myString defined as ivar in .h
}


dbAccess = [[DBAccess alloc] init]; 
// …
[dbAccess setPassCode:textField.text];