I've Category problem : No visible #interface for 'NSString' declares in selector 'isUrl'
NSString+NSString.h
#import <Foundation/Foundation.h>
#interface NSString (NSString)
- (BOOL)isUrl;
#end
NSString+Nsstring.m
#import "NSString+NSString.h"
#implementation NSString (NSString)
- (BOOL) isUrl {
if ([self hasPrefix:#"http://"]) {
return YES;
} else {
return NO;
}
}
#end
ViewController.m
#import "ViewController.h"
#import "NSString+NSString.h"
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSString* string1 = #"http://apple.com/";
NSString* string2 = #"Apple";
if ([string1 isURL]) { // **Here is an error**
NSLog (#"string1 is URL");
}
if ([string2 isURL]) { // **And here**
NSLog (#"string2 is NOT URL");
}
}
What I'm doing wrong?
isURL isn't the same as isUrl :)
You've called your method in your category isUrl but you're trying to use a method called isURL in your code.
Though you're better off letting iOS test if something is a URL or not -
-(BOOL)isURL {
return nil != [NSURL URLWithString:self];
}
Related
I have an NSObject called FHSUploadManager, which is a singleton object. Everything has appears to be working, expect today I been getting some strange messages.
2011-09-16 13:26:05.892 FHMedia[6038:6903] -[FHSUploadManager initialize]: unrecognized selector sent to instance 0x6b96900
2011-09-16 13:26:06.975 FHMedia[6038:6903] *** NSInvocation: warning: object 0xb0352cb8 of class 'úè0°8s†Gà–!Ä' does not implement methodSignatureForSelector: -- trouble ahead
2011-09-16 13:26:06.983 FHMedia[6038:6903] *** NSInvocation: warning: object 0xb0352cb8 of class 'úè0°8s†Gà–!Ä' does not implement doesNotRecognizeSelector: -- abort
It does not look like anything is broken, but these messages have me concern. Has anyone seen this before? Anyone have an idea on how to debug this?
I have taken out some of the methods for privacy and space.
Here is my FHSUploadManager.h
#class ListObject;
#class MergedItem;
#class ServerSync;
#class AppDelegate_Shared;
#class RegisteredUser;
#interface FHSUploadManager : NSObject {
NSMutableArray *uploadItems;
NSMutableArray *objectIds;
// KVO values
BOOL isSyncing;
NSString *uploadingStatus;
ListObject *uploadObject;
AppDelegate_Shared *appDelegate;
ServerSync *sync;
}
#property (assign) BOOL isSyncing;
#property (assign) NSString *uploadingStatus;
#property (assign) ListObject *uploadObject;
#property (assign) AppDelegate_Shared *appDelegate;
#end
Here is FHSUploadManager.m
#import "FHSUploadManager.h"
#import "ListObject.h"
#import "Reachability.h"
#import "ServerSync.h"
#import "AppDelegate_Shared.h"
#import "ItemAttribute.h"
#import "CoreItem.h"
#import "Media.h"
#import "MergedItem.h"
#import "WebServices.h"
#import "NSManagedObject+XML.h"
#import "NSNotificationCenter+MainThread.h"
#import "PowerMeXMLParser.h"
#import "RegisteredUser.h"
#import "TBXML.h"
static FHSUploadManager* sharedInstanceFHSUploadManager = nil;
#implementation FHSUploadManager
#synthesize isSyncing;
#synthesize uploadingStatus;
#synthesize uploadObject;
#synthesize appDelegate;
- (void)dealloc {
[uploadItems release];
[uploadingStatus release];
[uploadObject release];
[objectIds release];
[sync release];
[super dealloc];
}
-(void)startUpload
{
if( !isSyncing )
{
self.isSyncing = YES;
[self performSelectorInBackground:#selector(uploadingInBackground) withObject:nil];
}
}
// !!! Other methods and not added here. !!!
#pragma mark - Apple Boiler Plate Singleton -
+ (FHSUploadManager*)sharedInstance {
#synchronized(self)
{
if (sharedInstanceFHSUploadManager == nil) {
sharedInstanceFHSUploadManager = [[super allocWithZone:NULL] init];
sharedInstanceFHSUploadManager.isSyncing = NO;
sharedInstanceFHSUploadManager.appDelegate = (AppDelegate_Shared*)[[UIApplication sharedApplication] delegate];
}
}
return sharedInstanceFHSUploadManager;
}
+ (id)allocWithZone:(NSZone *)zone {
return [[self sharedInstance] retain];
}
- (id)copyWithZone:(NSZone *)zone {
return self;
}
- (id)retain {
return self;
}
- (NSUInteger)retainCount {
return NSUIntegerMax; //denotes an object that cannot be released
}
- (void)release {
//do nothing
}
- (id)autorelease {
return self;
}
#end
Update After comment saying it was gone
It is back! I talked with a fellow programmer and he is wondering if I am stomping on some memory. So I am going to look into a little bit more.
Looks like you are not inheriting from NSObject...
The FHSUploadManager object class is deallocating. In the Edit Schemes Enable Zombie Objects. You will get log of the deallocated instance.
You may be accessing the object once it is freed.
Add a breakpoint on FHSUploadManager dealloc method.
I have login Code like this :
#protocol LoginDelegate
-(void)DUsername:(NSString *) username DPassword:(NSString *) password;
#end
#interface loginipad : UIViewController {
id<LoginDelegate> delegate;
IBOutlet UITextField *edusername;
IBOutlet UITextField *edpassword;
}
and then i use this object on mainViewController like this :
#interface mainViewController : UIViewController<LoginDelegate> {
and call this methode on mainViewController
-(void)DUsername:(NSString *) username DPassword:(NSString *) password{
userlogin=[username retain];
passlogin=[password retain];
if (!scm.isRunning) {
[scm connectToHost:#"localhost" onPort:8080];
}
}
This method is success to parsing data from login modalview to mainViewController, but i want show progress of process or any message from mainViewController to login modal view when login button is klick (i try MBPrgoressHUD but no success due i use this login on modal view).
My Question how i can parsing data from mainViewController to This login modalview ?
Thanks,
for call the method :
loginipad *plogin = [[loginipad alloc] initWithNibName:#"loginipad" bundle:nil];
plogin.delegate = self;
UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:plogin];
plogin.title=#"Login";
[self presentModalViewController:nc animated:YES];
[nc release];
nc = nil;
[plogin release];
plogin = nil;
answer completely edited
Your question leads to multiple solutions and strategies.
First: general posibilities to implement bidirectional data-transfer between two classes.
via multiple protocols: loose cupling but leads to import-loops which are annoying. I know ho to solve import loops for class-definitions (#class) but I dont know how to solve this for protocols
A.h:
#import "B.h"
#protocol ADelegate
-(void) adelegate:(NSString*)data;
#end
#interface A : NSObject<BDelegate>
{
id<ADelegate> delegate;
}
#end
B.h:
#import "A.h"
#protocol BDelegate
-(void) bdelegate:(NSString*)data;
#end
#interface B : NSObject<ADelegate>
{
id<BDelegate> delegate;
}
#end
via a single protocol: dense cupling :( but no import-loop (this is a working ugly style)
A.h:
//no import here needed
#protocol ADelegate
-(void) adelegate:(NSString*)data;
#end
#interface A : NSObject<BDelegate>
{
id<ADelegate> delegate;
}
#end
B.h:
#import "A.h"
#interface B : NSObject<ADelegate>
{
A* delegate;
}
#end
via pipe/stream: bidirectional data-transfer should by done using a pipe (unbuffered) or stream (buffered)
here I show you a small and simple delegate-pipe but there also exists a NSPipe/NSStream
DelegatePipe.h
#protocol DelegatePipeDelegate
- dataArrived:(NSString*)data;
#end
#interface DelegatePipe : NSObject {
NSMutableArray *delegates;
}
-(void)open:(id<DelegatePipeDelegate>)d;
-(void)close:(id<DelegatePipeDelegate>)d;
-(void)send:(NSString*)data;
#end
DelegatePipe.m
#implementation DelegatePipe
-(id)init
{
if(self = [super init])
{
delegates = [NSMutableArray array];
}
return self;
}
-(void) dealloc
{
[delegates release];
delegates = nil;
}
-(void) open:(id <DelegatePipeDelegate>)d
{
#synchronized(self)
{
if([delegates containsObject:d])
return;
//if([delegates count]>=2) //Pipe contains originally only 2 delegates. but a broadcaster is also nice ;)
// return;
[delegates addObject:d];
}
}
-(void) close:(id <DelegatePipeDelegate>)d
{
#synchronized(self)
{
[delegates removeObject:d];
}
}
-(void) send:(NSString *)data
{
#synchronized(self)
{
for(id<DelegatePipeDelegate> d in delegates)
[d dataArrived:data];
}
}
#end
Second: KVO
KVO is often used in a ModelViewController (MVC) Pattern. eg: visualize data in a view. The network-connection-state in your case is part of data and your loginipad is a view (and a controller)
Authentificator.h
typedef enum eAuthState
{
NOT_CONNECTED = 0,
LOGIN_FAILED,
CONNECING,
CONNECTED
} AuthState;
#interface Authentificator : NSObject {
AuthState state;
}
#property (nonatomic, assign) AuthState state;
#end
Authentificator.m
...
-(void) doAuthWithUsername:(NSString*)name password:(NSString*)pw
{
self.state = CONNECING;
//do network-stuff
}
//delegate from network. here NSURLConnection
-(void) connectionDidFinishLoading:(NSURLConnection *)connection
{
//parse network-answer
BOOL success = YES;
if(success)
self.state = CONNECTED;
else
self.state = LOGIN_FAILED;
}
loginipad.h
#interface loginipad : UIViewController
{
Authentificator *auth;
}
#property (nonatomic, retain) Authentificator *auth;
#end
loginipad.m
#implementation loginipad
#synthesize auth;
//override setter for more comfortable use (add/removeObserver)
-(void) setAuth:(Authentificator *)a
{
#synchronized(auth)
{
[auth removeObserver:self forKeyPath:#"state"];
[auth release];
auth = a;
[auth retain];
[auth addObserver:self forKeyPath:#"state" options:0 context:nil];
}
}
-(IBAction) buttonClicked:(id)aSender
{
self.auth = [Authentificator sharedAuthentificator];
}
-(void) observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
if(![object isKindOfClass:Authentificator.class])
return;
AuthState state = ((Authentificator*)object).state;
NSLog(#"curState: %i",state);
//do sth with state
}
- (void)dealloc {
self.auth = nil;
[super dealloc];
}
Anyidea why autocomplete does not work on the spaceScene property?
#import <Foundation/Foundation.h>
#import "cocos2d.h"
#class SpaceScene;
#interface SpaceSceneSingleton : NSObject
{
SpaceScene *spaceScene;
}
#property (assign) SpaceScene *spaceScene;
+(SpaceSceneSingleton*)sharedSpaceSceneSingleton;
-(void) addChildToSceneWith:(CCNode *) node andWithZindex: (int) zIndex;
-(void) runAction:(CCAction*) action;
-(void) setTouchIsEnabled:(BOOL) isEnabled;
-(void) removeChild: (CCNode *) child;
#end
#import "SpaceSceneSingleton.h"
#implementation SpaceSceneSingleton
#synthesize spaceScene;
static SpaceSceneSingleton* _sharedSpaceSceneSingleton = nil;
+(SpaceSceneSingleton*)sharedSpaceSceneSingleton;
{
#synchronized([SpaceSceneSingleton class])
{
if (!_sharedSpaceSceneSingleton)
[[self alloc] init];
return _sharedSpaceSceneSingleton;
}
return nil;
}
+(id)alloc
{
#synchronized([SpaceSceneSingleton class])
{
NSAssert(_sharedSpaceSceneSingleton == nil, #"Attempted to allocate a second instance of a singleton.");
_sharedSpaceSceneSingleton = [super alloc];
return _sharedSpaceSceneSingleton;
}
return nil;
}
-(id)init {
self = [super init];
if (self != nil) {
// initialize stuff here
}
return self;
}
-(void) addChildToSceneWith:(CCNode *) node andWithZindex: (int) zIndex
{
[self.spaceScene addChild:node z:zIndex];
}
-(void) runAction:(CCAction*) action
{
//[self.spaceScene add
}
-(void) setTouchIsEnabled:(BOOL) isEnabled
{
}
-(void) removeChild: (CCNode *) child
{
}
#end
You only declared #class SpaceScene; so within this scope nothing more is known than that a class called SpaceScene might exist. Maybe importing SpaceScene.h helps.
I would even say this should compile with warnings. Does it?
I have this code in my viewController:
- (GraphModel *)graphModel
{
if (!graphModel) {
graphModel = [[GraphModel alloc] init];
NSLog(#"graphModel = %#", graphModel);
}
return graphModel;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.graphView.delegate = [self graphModel];
NSLog(#"self.graphview.delegate = %#", self.graphView.delegate);
[self updateUI];
}
but the NSLog just says (null) for self.graphview.delegate
even though the NSLog in graphModel says that I successfully created an object. How can this be?
this is the code for the graphViewDelegate
#class GraphView;
#protocol GraphViewDelegate
- (double)yValueForGraphView:(GraphView *)requestor atPosition:(int)i withPrecision:(int)precision;
- (double)scaleForGraphView:(GraphView *)requestor;
#end
#interface GraphView : UIView {
id <GraphViewDelegate> delegate;
}
#property (assign) id <GraphViewDelegate> delegate;
#end
and then I have #synthesize delegate in graphView.m
Most likely guess: graphView is nil. Calling any method on a nil object has no effect and returns nil, and the .delegate is actually a call to the getter or setter as appropriate. I recommend you add:
NSLog(#"self.graphview = %#", self.graphView);
As a quick verification.
I'm making some tabs and I want to have my own delegate for them but when I try to send an action to the delegate nothing happens.
I also tried following this tutorial:
link text
But it doesn't work for me :(
Here is my code:
TiMTabBar.h
#protocol TiMTabBarDelegate;
#interface TiMTabBar : UIView {
id<TiMTabBarDelegate> __delegate;
...
int selectedItem;
...
}
//- (id)init;
- (id)initWithDelegate:(id)aDelegate;
- (void)setSelectedIndex:(int)item;
..
#property (nonatomic) int selectedItem;
#property(assign) id <TiMTabBarDelegate> __delegate;
..
...
#end
#protocol TiMTabBarDelegate<NSObject>
//#optional
- (void)tabBar:(TiMTabBar *)_tabBar didSelectIndex:(int)index;
#end
TiMTabBar.m:
#import "TiMTabBar.h"
...
#interface NSObject (TiMTabBarDelegate)
- (void)tabBar:(TiMTabBar *)_tabBar didSelectIndex:(int)index;
#end
#implementation TiMTabBar
#synthesize selectedItem;
#synthesize __delegate;
...
/*
- (id)init
{
...
return self;
}
*/
- (id)initWithDelegate:(id)aDelegate;
{
//[super init];
__delegate = aDelegate;
return self;
}
- (void)awakeFromNib
{
//[self init];
//[self initWithDelegate:self];
...
}
- (void)setSelectedIndex:(int)item {
selectedItem = item;
if (self.__delegate != NULL && [self.__delegate respondsToSelector:#selector(tabBar:didSelectIndex:)]) {
[__delegate tabBar:self didSelectIndex:selectedItem];
}
...
if (item == 0) {
...
} else if (item == 1) {
...
} else if (item == 2) {
...
} else if (item == 3) {
...
} else if (item == 4) {
...
} else {
...
}
}
/*
- (void)tabBar:(TiMTabBar *)_tabBar didSelectIndex:(int)index;
{
//[delegate tabBar:self didSelectIndex:index];
//if (self.delegate != NULL && [self.delegate respondsToSelector:#selector(tabBar:didSelectIndex:)]) {
//[delegate tabBar:self didSelectIndex:selectedItem];
//}
NSLog(#"tabBarDelegate: %d",index);
}
*/
#end
The delegate only works works inside itself and not in any other files like:
#interface XXXController : UIViewController <TiMTabBarDelegate> {
...
...
IBOutlet TiMTabBar *tabBar;
...
}
...
#end
XXXController.m:
#import "XXXController.h"
#import <QuartzCore/QuartzCore.h>
#implementation XXXController
- (void)viewDidLoad {
[super viewDidLoad];
[self becomeFirstResponder];
...
tabBar = [[TiMTabBar alloc] initWithDelegate:self];
//tabBar.__delegate = self;
...
}
#pragma mark TiMTabBar Stuff
- (void)tabBar:(TiMTabBar *)_tabBar didSelectIndex:(int)index;
{
NSLog(#"Controller/tabBarDelegate: %d",index);
}
#end
None of this seems to work in XXXController. Anyone know how to make this work?
In your XXXController viewDidLoad after you alloc and init a new TiMTabBar are you adding it to the controller's view? If not, perhaps the tab bar in your view that you are clicking on is one loaded from the nib that does not have the delegate set.
It looks like - In awakeFromNib, you are setting the delegate to itself. So whenever you try to send the delegate messages, you are actually sending them to your instance of TiMTabBar, not XXXController.