Basic Objective-C Declarations

Literals.m

// NSString
NSString *someAllocInitString = [[NSString alloc] initWthString: @“The String”];
NSString *someLiteralDeclaredString = @"The String";

// NSArray
NSArray *someAllocInitArray = [NSArray arrayWithObjects:@“firstObject”,@“secondObject”,@“thirdObject”];
NSArray *someLiteralDeclaredArray = @[@“firstObject”,@“secondObject”,@”thirdObject”];

// NSDictionary
NSDictionary *someAllocInitDictionary = [NSDictionary dictionaryWithObjectAndKeys : @“firstValue”,@“firstKey”
                                ,@“secondValue”,@“secondKey”]
// This would be more confusing because it has an order of value key not key value
NSDictionary *someLiteralDeclaredDictionary = @{@“firstKey”: @“firstValue”,@“secondKey”:@”secondValue”};

// If we want to get a specific value for an key without literals it would be like;
NSString *firstValue = [someDictionary objectForKey:@“firstKey”];
//But with literals it would something like this;
NSString *firstValue = someDictionary[@“firstKey”];