How to Pass Parameter to external class method?

Question

I am trying to do very simple operation.

in "TestFile.h" file i've declare property:

@property (nonatomic) NSDictionary *justTest;

and in implementation file "TestFile.m":

-(NSDictionary *)justTest:(NSString *) mystring {

NSLog(@"Here is my string: %@", mystring);
return nil;

}

Now i am trying to call "justTest" from another file. What i am doing:

 #import "TestFile.h"


- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.

  NSDictionary *testFile = [[TestFile alloc] init];

  [testFile justTest:@"Hello World!"]

}

This works fine until i'm trying to pass parameter.

if i just execute

[testFile justTest];

it works, but when i try to pass parameter

[testFile justTest:@"Hello World!"];

does not work and the debug message is:

no visible @interface for 'TestFile' declares the selector 'justTest':

What is wrong with me?

Note that what `[testFile justTest];` is really doing is getting the existing value of the property and then throwing it away. — Phillip Mills, May 13 '14 at 13:32

score 1 · Accepted Answer · answered May 13 '14 at 13:28

You need to make this method public by adding method name to TestFile.h file before @end:

-(NSDictionary *)justTest:(NSString *) mystring;

Just to let you know when you add @property compiler synthesise it (create) two method getter, exactly the same name as your property and setter compiler add 'set' prefix, for example, you declare:

@property (nonatomic) NSDictionary *justTest;

compiler will create two methods:

-(NSDictionary *)justTest {...}
-(void)setJustTest {...}

You need to know that in your code you override the getter method.

score 1 · Answer 2 · answered May 13 '14 at 13:38

1

Declare your method in TestFile.h file before calling from an external class.

-(NSDictionary *)justTest:(NSString *) mystring;

answered May 13 '14 at 13:38

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How to Pass Parameter to external class method?

2 Answers2