I'm I newbie to objective-c & C lang and maybe I miss some basic principles. But how can I pass a variable value from one method without parameters to another inside one class?
- (id)init { self = [super init]; if (self) { myInt = 1; } return self; } -(void)methodOne { myInt = 5; } -(void)methodTwo { NSLog(@"%i", myInt); // 1 } You probably want to have a property inside your class.
Simply talking, property is a variable for instances of your class. More info: https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/DefiningClasses/DefiningClasses.html#//apple_ref/doc/uid/TP40011210-CH3-SW7
You want to use a property so try this
MyClass.h
@interface MyClass : NSObject // Because the property is here it is public so instances // of this class can also access it. @property (assign) int myInt; @end MyClass.m
#import "MyClass.h" // If you wish to make the property private then remove the property from above and add // Only do this if you want it to be private to the implementation and not public @interface MyClass() @property (assign) int myInt; @end @implementation MyClass // The synthesize is done automatically so no need to do it yourself - (id)init { self = [super init]; if(self) { // Set the initial value of myInt to 1 self.myInt = 1; } return self; } - (void)methodOne { // Reassign to 5 [self setMyInt:5]; } - (void)methodTwo { // NSLog the value of the myInt NSLog(@"MyInt is equal to: %d", [self myInt]); } @end There is quite a bit of Apple documentation on properties in objective-c, so here they are:
Naming Properties and Data Types
Enjoy a good read.
You would make myInt a member of the class which the methods are a part of in order to achieve what I think you're trying to achieve...
global variable after @implementation:
@implementaion blabla
int myInt = 10;
But at this way the number of your instance will be limited by 1. If you need only one instance, you can use it that way.
