Callback methods from C to Objective-C

Question

I have an Objective-C class. What I am doing is I am calling C functions in my objective-C class [ This C functions I implemented in one file , which is part in this sample ios

Answer 1

even in Blocks also you can't access instance variables right. Please check the following code snippet.

// this is simple block code

NSString* (^trimTheStr)(NSString*) = ^(NSString *str) {

[self myInstanceMethods]; // This will show error right 

NSString *result = nil;

result = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

return result;

};