Cheat Sheet

C#	Objective-C
Initialize String
string str = @"x";	NSString *str = @"x";
Append String
string str1 = "a"; string str2 = "b"; string str3 = str1 + str2	NSString *str1 = @"a"; NSString *str2 = @"b"; NSString *str3 = [str1 stringByAppendingString:str2]; More
//Definition //Not required //Declaration void MyFunction() { } //Invocation MyFunction();	//Definition (ViewController.h) @interface ViewController : UIViewController -(void) MyFunction; @end //Declaration (ViewController.m) @implementation ViewController - (void) MyFunction { } @end //Invocation (ViewController.m) [self MyFunction];
//Definition //Not required //Declaration string GetGreetings(string strName) { return "Hello " + strName; } //Invocation string strResult = GetGreetings("Usman");	//Definition (ViewController.h) @interface ViewController : UIViewController -(NSString *) GetGreetings:(NSString *)strMessage; @end //Declaration (ViewController.m) @implementation ViewController -(NSString *) GetGreetings:(NSString *)strMessage; {     return [@"Hello " stringByAppendingString:strMessage]; } @end //Invocation (ViewController.m) NSString *strResult = [self GetGreetings: @"Usman"];