diff options
| -rw-r--r-- | objective-c.html.markdown | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/objective-c.html.markdown b/objective-c.html.markdown index 0dbb3ae3..e41e71c3 100644 --- a/objective-c.html.markdown +++ b/objective-c.html.markdown @@ -20,7 +20,7 @@ Multi-line comments look like this */ // XCode supports pragma mark directive that improve jump bar readability -#pragma mark Navigation Functions // New tag on jump bar named 'Navigation Functions' +#pragma mark Navigation Functions // New tag o@"Third number = %@", thirdNumber); // prin jump bar named 'Navigation Functions' #pragma mark - Navigation Functions // Same tag, now with a separator // Imports the Foundation headers with #import @@ -133,6 +133,8 @@ int main (int argc, const char * argv[]) NSArray *anArray = @[@1, @2, @3, @4]; NSNumber *thirdNumber = anArray[2]; NSLog(@"Third number = %@", thirdNumber); // prints => "Third number = 3" + // Since Xcode 7, NSArray objects can be typed (Generics) + NSArray<NSString *> *stringArray = @[@"hello", @"world"]; // NSMutableArray is a mutable version of NSArray, allowing you to change // the items in the array and to extend or shrink the array object. // Convenient, but not as efficient as NSArray. @@ -146,6 +148,8 @@ int main (int argc, const char * argv[]) NSDictionary *aDictionary = @{ @"key1" : @"value1", @"key2" : @"value2" }; NSObject *valueObject = aDictionary[@"A Key"]; NSLog(@"Object = %@", valueObject); // prints => "Object = (null)" + // Since Xcode 7, NSDictionary objects can be typed (Generics) + NSDictionary<NSString *, NSNumber *> *numberDictionary = @{@"a": @1, @"b": @2}; // NSMutableDictionary also available as a mutable dictionary object NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithCapacity:2]; [mutableDictionary setObject:@"value1" forKey:@"key1"]; @@ -161,6 +165,8 @@ int main (int argc, const char * argv[]) // Set object NSSet *set = [NSSet setWithObjects:@"Hello", @"Hello", @"World", nil]; NSLog(@"%@", set); // prints => {(Hello, World)} (may be in different order) + // Since Xcode 7, NSSet objects can be typed (Generics) + NSSet<NSString *> *stringSet = [NSSet setWithObjects:@"hello", @"world", nil]; // NSMutableSet also available as a mutable set object NSMutableSet *mutableSet = [NSMutableSet setWithCapacity:2]; [mutableSet addObject:@"Hello"]; |