Just curious, what files are included when <Foundation/Foundation.h> or <Cocoa/Cocoa.h> is #imported? The framework and all the files in /usr/include?
Cocoa.h includes the following umbrella headers:
#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>
#import <CoreData/CoreData.h>
Digging deeper, CoreData.h includes
#import <Foundation/Foundation.h>
#import <CoreData/CoreDataDefines.h>
#import <CoreData/CoreDataErrors.h>
#import <CoreData/NSAttributeDescription.h>
#import <CoreData/NSEntityDescription.h>
#import <CoreData/NSFetchedPropertyDescription.h>
#import <CoreData/NSPropertyDescription.h>
#import <CoreData/NSRelationshipDescription.h>
#import <CoreData/NSFetchRequest.h>
#import <CoreData/NSFetchRequestExpression.h>
#import <CoreData/NSManagedObjectModel.h>
#import <CoreData/NSManagedObject.h>
#import <CoreData/NSManagedObjectID.h>
#import <CoreData/NSManagedObjectContext.h>
#import <CoreData/NSPersistentStoreCoordinator.h>
#import <CoreData/NSPersistentStore.h>
#import <CoreData/NSAtomicStore.h>
#import <CoreData/NSAtomicStoreCacheNode.h>
#import <CoreData/NSEntityMigrationPolicy.h>
#import <CoreData/NSMappingModel.h>
#import <CoreData/NSEntityMapping.h>
#import <CoreData/NSPropertyMapping.h>
#import <CoreData/NSMigrationManager.h>
AppKit.h includes
#import <Foundation/Foundation.h>
#import <AppKit/AppKitDefines.h>
#import <AppKit/AppKitErrors.h>
#import <AppKit/NSGraphicsContext.h>
#import <AppKit/NSAccessibility.h>
#import <AppKit/NSActionCell.h>
#import <AppKit/NSAlert.h>
#import <AppKit/NSAnimationContext.h>
#import <AppKit/NSAppleScriptExtensions.h>
#import <AppKit/NSApplication.h>
#import <AppKit/NSBox.h>
#import <AppKit/NSButton.h>
#import <AppKit/NSButtonCell.h>
#import <AppKit/NSCell.h>
#import <AppKit/NSClipView.h>
#import <AppKit/NSControl.h>
#import <AppKit/NSDockTile.h>
#import <AppKit/NSFont.h>
#import <AppKit/NSFontDescriptor.h>
#import <AppKit/NSFontManager.h>
#import <AppKit/NSFontPanel.h>
#import <AppKit/NSForm.h>
#import <AppKit/NSFormCell.h>
#import <AppKit/NSMatrix.h>
#import <AppKit/NSMenu.h>
#import <AppKit/NSMenuItem.h>
#import <AppKit/NSColor.h>
#import <AppKit/NSColorSpace.h>
#import <AppKit/NSBitmapImageRep.h>
#import <AppKit/NSBrowser.h>
#import <AppKit/NSBrowserCell.h>
#import <AppKit/NSCachedImageRep.h>
#import <AppKit/NSCIImageRep.h>
#import <AppKit/NSColorList.h>
#import <AppKit/NSColorPanel.h>
#import <AppKit/NSColorPicking.h>
#import <AppKit/NSColorPicker.h>
#import <AppKit/NSColorWell.h>
#import <AppKit/NSCursor.h>
#import <AppKit/NSCustomImageRep.h>
#import <AppKit/NSDocument.h>
#import <AppKit/NSDocumentController.h>
#import <AppKit/NSDragging.h>
#import <AppKit/NSEPSImageRep.h>
#import <AppKit/NSErrors.h>
#import <AppKit/NSEvent.h>
#import <AppKit/NSFileWrapper.h>
#import <AppKit/NSHelpManager.h>
#import <AppKit/NSGradient.h>
#import <AppKit/NSGraphics.h>
#import <AppKit/NSImage.h>
#import <AppKit/NSImageCell.h>
#import <AppKit/NSImageRep.h>
#import <AppKit/NSImageView.h>
#import <AppKit/NSNib.h>
#import <AppKit/NSNibLoading.h>
#import <AppKit/NSPrinter.h>
#import <AppKit/NSSpeechRecognizer.h>
#import <AppKit/NSSpeechSynthesizer.h>
#import <AppKit/NSSpellChecker.h>
#import <AppKit/NSSplitView.h>
#import <AppKit/NSOpenPanel.h>
#import <AppKit/NSPageLayout.h>
#import <AppKit/NSPanel.h>
#import <AppKit/NSPasteboard.h>
#import <AppKit/NSPopUpButton.h>
#import <AppKit/NSPrintInfo.h>
#import <AppKit/NSPrintOperation.h>
#import <AppKit/NSPrintPanel.h>
#import <AppKit/NSResponder.h>
#import <AppKit/NSSavePanel.h>
#import <AppKit/NSScreen.h>
#import <AppKit/NSScrollView.h>
#import <AppKit/NSScroller.h>
#import <AppKit/NSSegmentedControl.h>
#import <AppKit/NSSegmentedCell.h>
#import <AppKit/NSSlider.h>
#import <AppKit/NSSliderCell.h>
#import <AppKit/NSSpellProtocol.h>
#import <AppKit/NSText.h>
#import <AppKit/NSTextField.h>
#import <AppKit/NSTextFieldCell.h>
#import <AppKit/NSText.h>
#import <AppKit/NSTokenField.h>
#import <AppKit/NSTokenFieldCell.h>
#import <AppKit/NSTrackingArea.h>
#import <AppKit/NSView.h>
#import <AppKit/NSViewController.h>
#import <AppKit/NSWindow.h>
#import <AppKit/NSWindowController.h>
#import <AppKit/NSWorkspace.h>
#import <AppKit/NSComboBox.h>
#import <AppKit/NSComboBoxCell.h>
#import <AppKit/NSTableColumn.h>
#import <AppKit/NSTableHeaderCell.h>
#import <AppKit/NSTableHeaderView.h>
#import <AppKit/NSTableView.h>
#import <AppKit/NSOutlineView.h>
#import <AppKit/NSAttributedString.h>
#import <AppKit/NSLayoutManager.h>
#import <AppKit/NSParagraphStyle.h>
#import <AppKit/NSTextStorage.h>
#import <AppKit/NSTextView.h>
#import <AppKit/NSTextContainer.h>
#import <AppKit/NSTextAttachment.h>
#import <AppKit/NSInputManager.h>
#import <AppKit/NSInputServer.h>
#import <AppKit/NSStringDrawing.h>
#import <AppKit/NSRulerMarker.h>
#import <AppKit/NSRulerView.h>
#import <AppKit/NSSecureTextField.h>
#import <AppKit/NSInterfaceStyle.h>
#import <AppKit/NSNibDeclarations.h>
#import <AppKit/NSProgressIndicator.h>
#import <AppKit/NSTabView.h>
#import <AppKit/NSTabViewItem.h>
#import <AppKit/NSMenuView.h>
#import <AppKit/NSMenuItemCell.h>
#import <AppKit/NSPopUpButtonCell.h>
#import <AppKit/NSAffineTransform.h>
#import <AppKit/NSBezierPath.h>
#import <AppKit/NSPICTImageRep.h>
#import <AppKit/NSStatusBar.h>
#import <AppKit/NSStatusItem.h>
#import <AppKit/NSSound.h>
#import <AppKit/NSMovie.h>
#import <AppKit/NSMovieView.h>
#import <AppKit/NSPDFImageRep.h>
#import <AppKit/NSQuickDrawView.h>
#import <AppKit/NSDrawer.h>
#import <AppKit/NSOpenGL.h>
#import <AppKit/NSOpenGLView.h>
#import <AppKit/NSApplicationScripting.h>
#import <AppKit/NSDocumentScripting.h>
#import <AppKit/NSTextStorageScripting.h>
#import <AppKit/NSToolbar.h>
#import <AppKit/NSToolbarItem.h>
#import <AppKit/NSToolbarItemGroup.h>
#import <AppKit/NSWindowScripting.h>
#import <AppKit/NSStepper.h>
#import <AppKit/NSStepperCell.h>
#import <AppKit/NSGlyphInfo.h>
#import <AppKit/NSShadow.h>
#import <AppKit/NSATSTypesetter.h>
#import <AppKit/NSGlyphGenerator.h>
#import <AppKit/NSSearchField.h>
#import <AppKit/NSSearchFieldCell.h>
#import <AppKit/NSController.h>
#import <AppKit/NSObjectController.h>
#import <AppKit/NSArrayController.h>
#import <AppKit/NSDictionaryController.h>
#import <AppKit/NSTreeNode.h>
#import <AppKit/NSTreeController.h>
#import <AppKit/NSUserDefaultsController.h>
#import <AppKit/NSKeyValueBinding.h>
#import <AppKit/NSTextList.h>
#import <AppKit/NSTextTable.h>
#import <AppKit/NSDatePickerCell.h>
#import <AppKit/NSDatePicker.h>
#import <AppKit/NSLevelIndicatorCell.h>
#import <AppKit/NSLevelIndicator.h>
#import <AppKit/NSAnimation.h>
#import <AppKit/NSPersistentDocument.h>
#import <AppKit/NSRuleEditor.h>
#import <AppKit/NSPredicateEditor.h>
#import <AppKit/NSPredicateEditorRowTemplate.h>
#import <AppKit/NSPathCell.h>
#import <AppKit/NSPathControl.h>
#import <AppKit/NSPathComponentCell.h>
#import <AppKit/NSCollectionView.h>
#import <AppKit/NSTextInputClient.h>
and Foundation.h includes
#include <CoreFoundation/CoreFoundation.h>
#import <AvailabilityMacros.h>
#import <objc/objc.h>
#import <objc/objc-auto.h>
#import <Foundation/NSObjCRuntime.h>
#import <Foundation/NSAffineTransform.h>
#import <Foundation/NSArchiver.h>
#import <Foundation/NSArray.h>
#import <Foundation/NSAttributedString.h>
#import <Foundation/NSAutoreleasePool.h>
#import <Foundation/NSBundle.h>
#import <Foundation/NSByteOrder.h>
#import <Foundation/NSCalendar.h>
#import <Foundation/NSCalendarDate.h>
#import <Foundation/NSCharacterSet.h>
#import <Foundation/NSClassDescription.h>
#import <Foundation/NSCoder.h>
#import <Foundation/NSConnection.h>
#import <Foundation/NSData.h>
#import <Foundation/NSDate.h>
#import <Foundation/NSDateFormatter.h>
#import <Foundation/NSDecimal.h>
#import <Foundation/NSDecimalNumber.h>
#import <Foundation/NSDictionary.h>
#import <Foundation/NSDistantObject.h>
#import <Foundation/NSDistributedLock.h>
#import <Foundation/NSDistributedNotificationCenter.h>
#import <Foundation/NSEnumerator.h>
#import <Foundation/NSError.h>
#import <Foundation/NSException.h>
#import <Foundation/NSFileHandle.h>
#import <Foundation/NSFileManager.h>
#import <Foundation/NSFormatter.h>
#import <Foundation/NSGarbageCollector.h>
#import <Foundation/NSGeometry.h>
#import <Foundation/NSHashTable.h>
#import <Foundation/NSHFSFileTypes.h>
#import <Foundation/NSHost.h>
#import <Foundation/NSIndexPath.h>
#import <Foundation/NSIndexSet.h>
#import <Foundation/NSInvocation.h>
#import <Foundation/NSKeyValueCoding.h>
#import <Foundation/NSKeyValueObserving.h>
#import <Foundation/NSKeyedArchiver.h>
#import <Foundation/NSLocale.h>
#import <Foundation/NSLock.h>
#import <Foundation/NSMapTable.h>
#import <Foundation/NSMetadata.h>
#import <Foundation/NSMethodSignature.h>
#import <Foundation/NSNetServices.h>
#import <Foundation/NSNotification.h>
#import <Foundation/NSNotificationQueue.h>
#import <Foundation/NSNull.h>
#import <Foundation/NSNumberFormatter.h>
#import <Foundation/NSObject.h>
#import <Foundation/NSOperation.h>
#import <Foundation/NSPathUtilities.h>
#import <Foundation/NSPointerArray.h>
#import <Foundation/NSPointerFunctions.h>
#import <Foundation/NSPort.h>
#import <Foundation/NSPortCoder.h>
#import <Foundation/NSPortMessage.h>
#import <Foundation/NSPortNameServer.h>
#import <Foundation/NSProcessInfo.h>
#import <Foundation/NSPropertyList.h>
#import <Foundation/NSProtocolChecker.h>
#import <Foundation/NSProxy.h>
#import <Foundation/NSRange.h>
#import <Foundation/NSRunLoop.h>
#import <Foundation/NSScanner.h>
#import <Foundation/NSSet.h>
#import <Foundation/NSSortDescriptor.h>
#import <Foundation/NSSpellServer.h>
#import <Foundation/NSStream.h>
#import <Foundation/NSString.h>
#import <Foundation/NSTask.h>
#import <Foundation/NSThread.h>
#import <Foundation/NSTimeZone.h>
#import <Foundation/NSTimer.h>
#import <Foundation/NSUndoManager.h>
#import <Foundation/NSURL.h>
#import <Foundation/NSURLHandle.h>
#import <Foundation/NSUserDefaults.h>
#import <Foundation/NSValue.h>
#import <Foundation/NSValueTransformer.h>
#import <Foundation/NSXMLDTD.h>
#import <Foundation/NSXMLDTDNode.h>
#import <Foundation/NSXMLDocument.h>
#import <Foundation/NSXMLElement.h>
#import <Foundation/NSXMLNode.h>
#import <Foundation/NSXMLNodeOptions.h>
#import <Foundation/NSXMLParser.h>
#import <Foundation/NSZone.h>
#import <Foundation/NSExpression.h>
#import <Foundation/NSPredicate.h>
#import <Foundation/NSComparisonPredicate.h>
#import <Foundation/NSCompoundPredicate.h>
#import <Foundation/NSAppleEventDescriptor.h>
#import <Foundation/NSAppleEventManager.h>
#import <Foundation/NSAppleScript.h>
#import <Foundation/NSObjectScripting.h>
#import <Foundation/NSScriptClassDescription.h>
#import <Foundation/NSScriptCoercionHandler.h>
#import <Foundation/NSScriptCommand.h>
#import <Foundation/NSScriptCommandDescription.h>
#import <Foundation/NSScriptExecutionContext.h>
#import <Foundation/NSScriptKeyValueCoding.h>
#import <Foundation/NSScriptObjectSpecifiers.h>
#import <Foundation/NSScriptStandardSuiteCommands.h>
#import <Foundation/NSScriptSuiteRegistry.h>
#import <Foundation/NSScriptWhoseTests.h>
#import <Foundation/NSURLAuthenticationChallenge.h>
#import <Foundation/NSURLCredential.h>
#import <Foundation/NSURLCredentialStorage.h>
#import <Foundation/NSURLProtectionSpace.h>
#import <Foundation/NSURLCache.h>
#import <Foundation/NSURLConnection.h>
#import <Foundation/NSURLProtocol.h>
#import <Foundation/NSURLRequest.h>
#import <Foundation/NSURLResponse.h>
#import <Foundation/NSHTTPCookie.h>
#import <Foundation/NSHTTPCookieStorage.h>
#import <Foundation/NSURLDownload.h>
#import <Foundation/NSURLError.h>
#import <Foundation/FoundationErrors.h>
#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5
#import <Foundation/NSJavaSetup.h>
#endif
You can look in /System/Library/Frameworks to see for yourself.
Open up Xcode, and press command shift D. Type in Foundation/Foundation.h and press enter.
It doesn't include very much stuff in /usr/include.
I don't know if there is a better way to just get the list of files, but if you go to Build->Preprocess on any file you can see the file as the compiler sees it, with all the imports and other macros expanded.
Related
When reproducing step by step this this original example of RCTMapboxGL (5.1.0) I run into an error with the linker. This happens to me every time I try to use RCTMapboxGL.
I tried both the:
Manual installation process for iOS
Xcode console:
Installation process with CocoaPods
Xcode console:
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_RCTMapboxAnnotation", referenced from:
objc-class-ref in libRCTMapboxGL.a(RCTMapboxGL.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
The missing symbol RCTMapboxAnnotation is in ../node_modules/react-native-mapbox-gl/ios/RCTMapboxGL.xcodeproj, which is already added to my project as a reference.
Other Linker Flags in Xcode Build Settings
My solution was fixing all React import statements across the MapboxGL library.
Turning them into global imports in the form #import <React/MissingClass.h> solved the problem:
e.g. #import RCTView.h to #import <React/RCTView.h>
(9 files in total):
RCTMapboxAnnotation.m:
#import "RCTMapboxAnnotation.h"
#import <React/RCTEventDispatcher.h>
#import <React/UIView+React.h>
#import <React/RCTBridge.h>
#import <React/RCTUtils.h>
RCTMapboxAnnotation.h:
#import "RCTMapboxAnnotation.h"
#import <MapBox/MapBox.h>
#import <UIKit/UIKit.h>
#import <React/RCTConvert+MapKit.h>
#import <React/RCTComponent.h>
#import "RCTMapboxGL.h"
RCTMapboxAnnotationManager.m:
#import "RCTMapboxAnnotationManager.h"
#import <React/RCTUIManager.h>
#import <React/RCTConvert+CoreLocation.h>
#import <React/UIView+React.h>
#import "RCTMapboxAnnotation.h"
RCTMapboxAnnotationManager.h:
#import <React/RCTViewManager.h>
RCTMapboxGL.h:
#import <Mapbox/Mapbox.h>
#import <React/RCTView.h>
#import <React/RCTEventDispatcher.h>
#import <React/RCTBridgeModule.h>
RCTMapboxGL.m:
#import "RCTMapboxGL.h"
#import <React/RCTBridgeModule.h>
#import <React/RCTEventDispatcher.h>
#import <React/UIView+React.h>
#import <React/RCTLog.h>
#import "RCTMapboxGLConversions.h"
#import "RCTMapboxAnnotation.h"
RCTMapboxGLManager.h:
#import <React/RCTViewManager.h>
RCTMapboxGLManager.m:
#import "RCTMapboxGLManager.h"
#import "RCTMapboxGL.h"
#import <Mapbox/Mapbox.h>
#import <React/RCTConvert+CoreLocation.h>
#import <React/RCTConvert+MapKit.h>
#import <React/RCTBridge.h>
#import <React/RCTEventDispatcher.h>
#import <React/UIView+React.h>
#import <React/RCTUIManager.h>
#import "RCTMapboxGLConversions.h"
#import "MGLPolygon+RCTAdditions.h"
#import "MGLPolyline+RCTAdditions.h"
RCTMapboxGLConversions.m:
#import <Foundation/Foundation.h>
#import <React/RCTConvert+CoreLocation.h>
#import <React/RCTConvert+MapKit.h>
#import "RCTMapboxGL.h"
My project works fine on simulator but wouldn't build on real device after adding:
#synthesize extraView=_extraView;
It seems that this line somehow hides file header. Tried "Clean" - no change.
I've used #property and #synthesize many times before and haven't seen anything like this.
I'm planning to rewrite extraView handling but I'm asking just out of curiosity if someone has experienced similar error.
Platform:
XCode 4.0.1
4.2.1 Ipad
File header:
//
// MediaBook.h
// Dolphin
//
// Created by Handymood on 11-5-22.
// Copyright 2011 __Hanydmood__. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "SinglePage.h"
#import "LayerInfo.h"
#import "MediaBookXMLParser.h"
#import "GlobalSet.h"
#import "UIComponentBase.h"
#import "IndexPageInfo.h"
#import "IndexPage.h"
#import "TopBar.h"
#import "BottomBar.h"
#import "DolphinUIWebLayer.h"
#import "MediaBookBase.h"
#import "ColorUtil.h"
#import "DolphinUICategory.h"
#import "UICategoryUnit.h"
#import "ImageInfoBox.h"
#import "Gallery.h"
#import "Calendar.h"
#class SinglePage;
#class LayerInfo;
#class MediaBookXMLParser;
#class GlobalSet;
#class UIComponentBase;
#class IndexPageInfo;
#class IndexPage;
#class TopBar;
#class BottomBar;
#class DolphinUIWebLayer;
#class MediaBookBase;
#class ColorUtil;
#class DolphinUICategory;
#class UICategoryUnit;
#interface MediaBook : MediaBookBase <UIScrollViewDelegate>
{
UIImageLayer *backGroundImage;
UIView *bgView;
BottomBar *bottomBar;
DolphinUIWebLayer *webLayer;
DolphinUICategory *categoryLayer;
UIActivityIndicatorView *activityIndicator;
UIInterfaceOrientation preOrientation;
NSTimer *objQueMagTimer;
float previous_scroll_pos;
BOOL bar_status_hidden;
float top_bar_ori_y;
float bottom_bar_ori_y;
BOOL scroll_block_signal;
int screen_direction;//0:vertical 1:horizontal
BOOL webLayerOn;
BOOL categoryOn;
BOOL changingExtraView;
}
#property UIInterfaceOrientation preOrientation;
#property (nonatomic, retain) UIView *extraView;
-(void) initWithGlobalSet:(GlobalSet *) inGlobalSet;
-(void) initBook:(NSString *)configXmlAdd curOrientation:(UIInterfaceOrientation)interfaceOrientation;
-(void) initBookContent;
-(void) notificationSelector:(NSNotification *) notification;
-(void) statusBarAnimationTrigger;
-(void) layoutAdjustWithOrientation:(UIInterfaceOrientation)interfaceOrientation
orientaionType:(NSString *) inOrientationType;
-(void) closeCategoryLayer;
-(void) reset;
-(void) showExtraView:(NSString *)name;
-(void) hideExtraView;
#end
Screenshot of build errors:
I've used #property and #synthesize many times before and haven't seen any similar.
Adding following to interface declaration solved the problem:
UIView *_extraView;
Thanks to mja for the tip.
I'm trying to compile my Objective-C application but it fails saying "Unknown type name 'OpenGLView'". Now I know what this means but the weird thing is I'm convinced I'm importing it just fine.
#import <Foundation/Foundation.h>
#import "OpenGLView.h"
#import "Frame.h"
#import "Mesh2.h"
#import "Vector2.h"
#import "StaticRigidBody.h"
#import "DynamicRigidBody.h"
#interface PhysicsApplicationController : NSObject {
Frame* frame;
OpenGLView* view;
}
It fails on line 11 of this sample. You can see I import it on line 2. The thing which I can't get my head around though is the same import works completely fine in this segment.
#import <UIKit/UIKit.h>
#import "OpenGLView.h"
#interface PhysicsAppDelegate : UIResponder <UIApplicationDelegate> {
OpenGLView* _glView;
}
Both source files for the two segments are in the same directory. I have no idea what is going on.
[EDIT]
Content of OpenGLView.h
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#include <OpenGLES/ES2/gl.h>
#include <OpenGLES/ES2/glext.h>
#import "PhysicsApplicationController.h"
#interface OpenGLView : UIView {
CAEAGLLayer* _eaglLayer;
EAGLContext* _context;
GLuint _colorRenderBuffer;
GLuint _positionSlot;
GLuint _colorSlot;
PhysicsApplicationController* _physicsController;
}
typedef struct {
float position[3];
float color[4];
} Vertex;
- (void)renderFrame:(Frame*)frame;
- (void)drawObjectsInFrame:(Frame*)frame;
- (void)setupVBOsWithVertices:(Vertex*)vertices Indices:(GLubyte*)indices;
- (void)setPhysicsController:(PhysicsApplicationController*)controller;
#end
I need to develop an application which has a interface which implements methods of 3 protocols.
Assume protocol A extends protocol B and protocol C, and interface implements protocol A.
This is how my code looks,
// This is in MyClass.h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "protocol_A"
#interface MyClass : NSObject <protocol_A>
{
}
#end
//This is MyClass.m file
#import "MyClass.h"
#implementation myClass
-(void)methodinA
{
NSLog(#"I'm in protocol_A");
}
}
-(void)methodinB
{
NSLog(#"I'm in protocol_B");
}
-(void)methodinC
{
NSLog(#"I'm in protocol_C");
}
#end
//This is protocol_A.h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "protocol_B.h"
#import "protocol_C.h"
#protocol protocol_A <protocol_B, protocol_C>
-(void)methodinA;
#end
//This is in protocol_B.h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#protocol protocol_B
-(void)methodinB;
#end
//This is in protocol_C.h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#protocol protocol_C
-(void)methodinC;
#end
i'm getting an exception , and my app is getting crashed...
***Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<MyClass 0X323nm31>setvalue:forundefinedKey:]:this class is not key value coding-compilant for the key window'.
Plz Tel me how to solve this problem??
So where you're getting this from (and the reason you're getting it 3 times) is you've got a mistake in your protocol definitions. You have:
//This is in protocol_C.h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#protocol protocol_C
{
}
-(void)methodinC;
#end
You can't declare class members in a protocol: only methods. Because of this, you don't need (and, as you've discovered) can't have the curly braces in the protocol definition. As such, you need this for your protocol definitions:
//This is in protocol_C.h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#protocol protocol_C
-(void)methodinC;
#end
Removing those should solve your issue.
When making new files, I always go through Xcode's new-class-files process, as it frequently gives you lots of convenient stuff. Here is the contents of a new protocol_D declaration fresh from Xcode:
#import <Cocoa/Cocoa.h>
#protocol protocol_D
#end
Hope this helps!
TL;DR: Protocol definitions can't have curly-braces anywhere in them.
Protocols generally go in a .h file; always go in a .h file if you plan on using them anywhere.
Just like everything else, you need to #import the .h file that contains the definition of the protocol before you use it.
So, in MyClass.h (it really should be capitalized -- Classes are always capitalized in Objective-C), #import the various protocol .h files.
Your protocol_A.h file declares conformance to protocol_B and protocol_C, yet you haven't imported the headers for protocol_B and protocol_C. This means that you are declaring conformance to protocols that as far as the compiler is concerned, don't exist in protocol_A.h. You need to import the headers:
In protocol_A.h:
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "protocol_B.h" //note these new imports
#import "protocol_C.h"
#protocol protocol_A <protocol_B, protocol_C>
-(void)methodinA;
#end
Also see Apple's Communicating with Objects, which discusses delegates, protocols, and selectors. Though its listed under Mac OS X, most (if not all) appears to apply to iOS also.
It is my GameEngine.h:
#import <Foundation/Foundation.h>
#import "GameArray.h";
#interface GameEngine : NSObject {
GameArray *gameButtonsArray;
}
#property (nonatomic, retain) GameArray *gameButtonsArray;
And this is my GameArray.h:
#import <Foundation/Foundation.h>
#import "MyAppDelegate.h";
#interface GameArray : NSObject {
NSMutableArray *gameButtonsArray;
}
#property (nonatomic, retain) NSMutableArray *gameButtonsArray;
It keep prompt my "expected specifier-qualifier-list" error i my GameEngine.h, and error said that "expected specifier-qualifier-list before 'GameArray'", what's going on?
This is the best practice.
GameEngine.h
#import <Foundation/Foundation.h>
#class GameArray;
#interface GameEngine : NSObject {
GameArray *gameButtonsArray;
}
#property (nonatomic, retain) GameArray *gameButtonsArray;
Then in GameEngine.m
#import "GameEngine.h"
#import "GameArray.h"
#implementation GameEngine
//...
#end
This prevents circular references wherein one header imports a second header which imports the first which imports the second and so on in an endless cycle.
Lose the semi-colon on line 2 in your .h file
If removing the unnecessary semicolons does not fix your problem, most likely MyAppDelegate.h imports GameEngine.h creating a circular dependency between the GameEngine.h and GameArray.h. Try removing the #import "GameArray.h" from GameEngine.h and replacing it with:
#class GameArray;
Also add
#import "GameArray.h"
to GameEngine.m below the import of GameEngine.h