diff options
Diffstat (limited to 'objective-c.html.markdown')
| -rw-r--r-- | objective-c.html.markdown | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/objective-c.html.markdown b/objective-c.html.markdown index caad49a5..bac8fb55 100644 --- a/objective-c.html.markdown +++ b/objective-c.html.markdown @@ -55,7 +55,7 @@ int main (int argc, const char * argv[]) id myObject2 = nil; // Weak typing // %@ is an object // 'description' is a convention to display the value of the Objects - NSLog(@"%@ and %@", myObject1, [myObject2 description]); // Print "(null) and (null)" + NSLog(@"%@ and %@", myObject1, [myObject2 description]); // prints "(null) and (null)" // String NSString *worldString = @"World"; @@ -70,7 +70,7 @@ int main (int argc, const char * argv[]) char theLetterZ = [theLetterZNumber charValue]; // or 'Z' NSLog(@"%c", theLetterZ); - // Integral literals + // Integer literals NSNumber *fortyTwoNumber = @42; int fortyTwo = [fortyTwoNumber intValue]; // or 42 NSLog(@"%i", fortyTwo); @@ -128,9 +128,10 @@ int main (int argc, const char * argv[]) // May contain different data types, but must be an Objective-C object NSArray *anArray = @[@1, @2, @3, @4]; NSNumber *thirdNumber = anArray[2]; - NSLog(@"Third number = %@", thirdNumber); // Print "Third number = 3" - // NSMutableArray is mutable version of NSArray allowing to change items in array - // and extend or shrink array object. Convenient, but not as efficient as NSArray + NSLog(@"Third number = %@", thirdNumber); // prints "Third number = 3" + // NSMutableArray is a mutable version of NSArray allowing you to change + // items in array and extend or shrink array object. Convenient, but not + // as efficient as NSArray NSMutableArray *mutableArray = [NSMutableArray arrayWithCapacity:2]; [mutableArray addObject:@"Hello"]; [mutableArray addObject:@"World"]; @@ -140,7 +141,7 @@ int main (int argc, const char * argv[]) // Dictionary object NSDictionary *aDictionary = @{ @"key1" : @"value1", @"key2" : @"value2" }; NSObject *valueObject = aDictionary[@"A Key"]; - NSLog(@"Object = %@", valueObject); // Print "Object = (null)" + NSLog(@"Object = %@", valueObject); // prints "Object = (null)" // NSMutableDictionary also available as a mutable dictionary object NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithCapacity:2]; [mutableDictionary setObject:@"value1" forKey:@"key1"]; @@ -627,7 +628,7 @@ int main (int argc, const char * argv[]) { @end // Instances of Car now have access to the protocol. Car *carInstance = [[Car alloc] init]; -[[carInstance setEngineOn:NO]; +[carInstance setEngineOn:NO]; [carInstance turnOnEngine]; if ([carInstance engineOn]) { NSLog(@"Car engine is on."); // prints => "Car engine is on." |