diff options
| -rw-r--r-- | objective-c.html.markdown | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/objective-c.html.markdown b/objective-c.html.markdown index b6b378d5..33200b63 100644 --- a/objective-c.html.markdown +++ b/objective-c.html.markdown @@ -430,7 +430,12 @@ distance = 18; // References "long distance" from MyClass implementation return @42; } +<<<<<<< HEAD // To create a private method, create the method in the @implementation but not in the @interface +======= +// Objective-C does not have private method declarations, but you can simulate them. +// To simulate a private method, create the method in the @implementation but not in the @interface. +>>>>>>> 421f48c... Add description and example of how to simulate protected methods. - (NSNumber *)secretPrivateMethod { return @72; } @@ -485,11 +490,11 @@ distance = 18; // References "long distance" from MyClass implementation @end -// Now, if we wanted to create a Truck object, we would create a subclass of Car instead as it would +// Now, if we wanted to create a Truck object, we would instead create a subclass of Car as it would // be changing the functionality of the Car to behave like a truck. But lets say we want to just add // functionality to this existing Car. A good example would be to clean the car. So we would create // a category to add these cleaning methods: -// @interface filename: Car+Clean.h +// @interface filename: Car+Clean.h (BaseClassName+CategoryName.h) #import "Car.h" // Make sure to import base class to extend. @interface Car (Clean) // The category name is inside () following the name of the base class. @@ -499,8 +504,8 @@ distance = 18; // References "long distance" from MyClass implementation @end -// @implementation filename: Car+Clean.m -#import "Car+Clean.h" +// @implementation filename: Car+Clean.m (BaseClassName+CategoryName.m) +#import "Car+Clean.h" // Import the Clean category's @interface file. @implementation Car (Clean) @@ -511,13 +516,13 @@ distance = 18; // References "long distance" from MyClass implementation NSLog(@"Waxed."); } -@end +@end // Any Car object instance has the ability to use a category. All they need to do is import it: #import "Car+Clean.h" // Import as many different categories as you want to use. #import "Car.h" // Also need to import base class to use it's original functionality. -int main(int argc, const char *argv[]) { +int main (int argc, const char * argv[]) { @autoreleasepool { Car *mustang = [[Car alloc] init]; mustang.color = @"Red"; @@ -529,6 +534,24 @@ int main(int argc, const char *argv[]) { return 0; } +// Objective-C does not have protected method declarations but you can simulate them. +// Create a category containing all of the protected methods, then import it ONLY into the +// @implementation file of a class belonging to the Car class: +@interface Car (Protected) // Naming category 'Protected' to remember methods are protected. + +- (void)lockCar; // Methods listed here may only be created by Car objects. + +@end +//To use protected methods, import the category, then implement the methods: +#import "Car+Protected.h" // Remember, import in the @implementation file only. + +@implementation Car + +- (void)lockCar { + NSLog(@"Car locked."); // Instances of Car can't use lockCar because it's not in the @interface. +} + +@end // Protocols // A protocol declares methods that can be implemented by any class. |