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• Using the system localizations on iPhone

  - by nevan

  I want to make a back button for a navigation controller with the title "Back" instead of the title of the previous controller. I'm using this code: UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Back", @"Back") style:UIBarButtonItemStyleBordered target:nil action:nil]; self.navigationItem.backBarButtonItem = backButton; I'd like to be able to skip localizing the "Back" string in my app (since I can only localize it in a limited number of languages). If I give my navigation controller no title, the back button will be automatically localized into whatever the language the user has chosen, so the system has translations of "Back" in many languages. Is there a way to access the localizations that are already present in the system and use them myself? These are things like "Back", "Cancel", "Done" and so on, which show up when creating one of the standard system buttons.

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• a + sing in email address

  - by d.andreykiv

  Hi. I need to submit an email address with a "+" sign and validate in on server. But server receives email like "[email protected]" as "aaa [email protected]". I send all data as POST request with following code NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@", url, @"/signUp"]]; NSString *post = [NSString stringWithFormat:@"&email=%@&userName=%@&password=%@", user.email, user.userName, user.password]; NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:NO]; NSData* data = [self sendRequest:url postData:postData]; post variable before encoding has value &[email protected]&userName=Asdfasdfadsfadsf&password=sdfasdf after encoding it is same &[email protected]&userName=Asdfasdfadsfadsf&password=sdfasdf Method I use to send request looks like following code: -(id) sendRequest:(NSURL*) url postData:(NSData*)postData { // Create request NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; NSString *postLength = [NSString stringWithFormat:@"%d",[postData length]]; [request setURL:url]; [request setHTTPMethod:@"POST"]; [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Current-Type"]; [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; [request setHTTPBody:postData]; NSURLResponse *urlResponse; NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:nil]; [request release]; return data; }

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• Is it possible to send OSC commands to an iPad via the Camera Connection Kit?

  - by HELVETICADE

  I'm building a small controller device that I'd like to partner with a computer. I've settled on using OSC out from my custom built hardware and am pretty satisfied with what I can get from WOscLib. Two goals I'd like to achieve are portability and a very nice ratio between battery:computing power, and this has lured me towards using iPhoneOS to accomplish my goals. I think the iPad would suit my needs perfectly, except that using wifi to broadcast OSC out from my device requires that device to be connected to a third device with a wifi chip, and this would destroy the goal of portability, whilst also introducing potential latency and stability headaches. My question is pretty simple: Can I push OSC commands FROM my controller TO an iPad via USB and the Camera Connection Kit? If I could accomplish this, the two major goals of my project would be fulfilled very nicely. This seems like it should be a simple little question, but researching this obsessively over the past few weeks has left me more almost more uncertain than if I had done no research at all. I'd really like some more confidence before I go down this route, and it seems like it should be possible. Any insight would be very, very appreciated.

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• TouchCode XML parsing error

  - by itsaboutcode

  Hi, I have a xml document which has only one element in the document, which is <error>error string<error> But when i try to parse it, it says this document has no element at all. In other words when i try to access the rootElement it says "null" CXMLDocument *rssParser = [[[CXMLDocument alloc] initWithContentsOfURL:url options:0 error:nil] autorelease]; NSLog(@"Root: %@",[[rssParser rootElement] name]); Please tell me what is wroing with this. Thanks

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• Any simple way to "resize" an NSBezierPath?

  - by d11wtq

  I have an NSBezierPath that I'm filling and stroking. I'd like to add some inner glow to the path (a light stroke, just inside of the outer stroke), and the thing that comes to mind is to use the same path shrunk by 1 pixel (the size of the line that is already )stroked. Is there a way to do this? Alternatively, is there some sort of pattern I can use when applying both a border (stroke) and a glow to a bezier path? Example, the (extremely subtle) inner glow on the Google Chrome tabs:

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• Custom UIProgressView drawing weirdness

  - by Werner

  I am trying to create my own custom UIProgressView by subclassing it and then overwrite the drawRect function. Everything works as expected except the progress filling bar. I can't get the height and image right. The images are both in Retina resolution and the Simulator is in Retina mode. The images are called: "[email protected]" (28px high) and "[email protected]" (32px high). CustomProgressView.h #import <UIKit/UIKit.h> @interface CustomProgressView : UIProgressView @end CustomProgressView.m #import "CustomProgressView.h" @implementation CustomProgressView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // Initialization code } return self; } // Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { // Drawing code self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width, 16); UIImage *progressBarTrack = [[UIImage imageNamed:@"progressBarTrack"] resizableImageWithCapInsets:UIEdgeInsetsZero]; UIImage *progressBar = [[UIImage imageNamed:@"progressBar"] resizableImageWithCapInsets:UIEdgeInsetsMake(4, 4, 5, 4)]; [progressBarTrack drawInRect:rect]; NSInteger maximumWidth = rect.size.width - 2; NSInteger currentWidth = floor([self progress] * maximumWidth); CGRect fillRect = CGRectMake(rect.origin.x + 1, rect.origin.y + 1, currentWidth, 14); [progressBar drawInRect:fillRect]; } @end The resulting ProgressView has the right height and width. It also fills at the right percentage (currently set at 80%). But the progress fill image isn't drawn correctly. Does anyone see where I go wrong?

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• Duplicate conflicting frameworks in cocoa plug-ins

  - by Carmen

  I am currently writing a plug-in framework for my application. I would like to be able to release plugins without having to update my application, and I intend on making the framework available for third party plugins. I am currently running into issues when two plugins ship with identical frameworks. When the plugins are loaded the runtime gets confused because the framework gets loaded twice. What is the best way to mitigate this issue?

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• add text to UITextField at desired location

  - by Ankit Sachan

  Hello, Hello, I am quite new to iphone development. I have a situation here. I have some labels which can be dragged across the screen. When any of these labels are dragged to some textfield and released over a textfields UIlabel test is assigned to that text field. Now the problem is this I want to assign the text of UILabel to some specific position in textfield according to release of textfield i.e If user releases at the beginning of text field then it should be appended at the beginning and if somewhere near end of text of textfield then it should be appendended at the end. Can you help me to fabricate this condition. Thanx in advance

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• Changing position of selector programmatically in Pickerview when it is initially loaded.

  - by iSharreth

  How can we change the position of the selector in the Pickerview when it is loaded. For example, I want to make row 3 initially selected when it is loaded. Anyone please help.

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• Which Ipod touch generation should I buy? 2nd or 3rd?

  - by kukabunga

  I want to create games for Iphone/Ipod touch. Unfortunately I don't have a lot of money so I can buy only one device. Ipod is cheaper than Iphone, so I decided to bought Ipod touch. But I am afraid of buying 3rd generation - because it has more memory, more faster CPU, etc. And I think if I post my app on appstore - people with 2nd generation Ipod might have trouble with my app (because I was testing it on 3rd generation). But on the other hand - I am planning to create 3d/cpu demanding game - and it would be easy for me to implement it on device with more calculation power... What should I do in this situation? Any advice is appreciate.

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• Using setters On Int?

  - by fuzzygoat

  Just curious, given: unsigned int pulseCounter_001; @property(nonatomic, assign)unsigned int pulseCounter_001; @synthesize pulseCounter_001; Is there any reason to use: [self setPulseCounter_001:0]; Or just use: pulseCounter_001 = 0; Style wise I think the latter says "we are setting an int" better, just curious as to any overheads involved in each? gary

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• how do I take the URL and page title from a UITableView?

  - by nzsystem

  Hi I have an iPhone app that shows the user a UIWebView in the first view, what I am trying to do is allow the user to save what is essentially favorites to be saved and then displayed in a table view in the second view. To do this all i need is the page URL and also the Page Title to be saved to then populate the table view. Now here is the problem I am just starting to learn how to make iPhone apps and I have no clue what would be the best way to save it and how to get this information from the web view?

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• Urban Airship - not receving push notifications on device?

  - by Silent

  Hey guys just installed everything to my app tried to push but no messages appear the token for my device is saved so thats working, when i push the website says it sent but no message on device. Right now im using production certificate for push notification with a developer pervision and not the distrubution certificate. I tried cleaning the build and reinstalling but no luck since an extra app was installed from the same one. I used the code that is on the sample file tutorial i think thats all the detail dont know what to do next.

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• how to get two segments in table with different in it

  - by abhi

  how to get two segments in table with different rows in it in iphone.

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• Problem while looping on a NSDictionary

  - by Tom

  Hi! The end of my loop causes a EXC_BAD_ACCESS. Here's my dictionary (AppDelegate.data): 1 = ( 3, "Test 1", False, "" ); 2 = ( 4, "Test 2", False, "" ); And here is my loop: for (id theKey in AppDelegate.data) { if (theKey = nil) { NSLog(@"HOLY COW"); } else { NSLog(@"Key: %@ ?", theKey); } } It never says holy cow, and it says the right key but at the end it crashes... Do you have any idea why? It should only loop on 1 and two and then exit the loop... I know that there's always a "nil" object at the end that's why I did a condition with it but it doesn't look like it works at all.. Thanks!

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• Moving UIButton around

  - by pbcoder

  I've tried to move a UIButton up and down in a menu. The problem I've got with the following solution is that the timer is not accurate. Sometimes the Button is moved up 122px, sometimes only 120px. How I can fix this? -(IBAction)marketTabClicked:(id)sender { if (marketTabExtended) { NSLog(@"marketTabExtended = YES"); return; } else { if (iPhoneAppsExtended) { timer = [NSTimer scheduledTimerWithTimeInterval:0.005 target: self selector: @selector(animateItemApps) userInfo: nil repeats: YES]; } else { if (homepageExtended) { timer = [NSTimer scheduledTimerWithTimeInterval:0.005 target: self selector: @selector(animateItemHomepage) userInfo: nil repeats: YES]; } else { timer = [NSTimer scheduledTimerWithTimeInterval:0.005 target: self selector: @selector(animateItemMarketing) userInfo: nil repeats: YES]; } } } [self performSelector:@selector(stopTimer) withObject:self afterDelay:0.605]; iPhoneAppsExtended = NO; homepageExtended = NO; marketTabExtended = NO; marketTabExtended = YES; } -(void)animateItemApps { CGPoint movement; movement = CGPointMake(0, -1); homepage.center = CGPointMake(homepage.center.x, homepage.center.y + movement.y); } -(void)animateItemHomepage { CGPoint movement; movement = CGPointMake(0, 1); homepage.center = CGPointMake(homepage.center.x, homepage.center.y + movement.y); //marketTab.center = CGPointMake(marketTab.center.x, marketTab.center.y + movement.y); } -(void)animateItemMarketing { CGPoint movement; movement = CGPointMake(0, -1); //marketTab.center = CGPointMake(marketTab.center.x, marketTab.center.y + movement.y); homepage.center = CGPointMake(homepage.center.x, homepage.center.y + movement.y); } -(void)stopTimer { [timer invalidate]; }

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• Can I safely store UInt32 to NSUInteger?

  - by mystify

  In the header, it is defined like: #if __LP64__ || (TARGET_OS_EMBEDDED && !TARGET_OS_IPHONE) || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64 typedef long NSInteger; typedef unsigned long NSUInteger; #else typedef int NSInteger; typedef unsigned int NSUInteger; #endif So does an UInt32 fit without problems into an NSUInteger (an unsigned int)? Where's the difference between UInt32 and unsigned int? And I assume that an unsigned long is bigger than an unsigned int?

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• Reference-counted object is used after it is released

  - by EndyVelvet

  Doing code analysis of the project and get the message "Reference-counted object is used after it is released" on the line [defaults setObject: deviceUuid forKey: @ "deviceUuid"]; I watched this topic Obj-C, Reference-counted object is used after it is released? But the solution is not found. ARC disabled. // Get the users Device Model, Display Name, Unique ID, Token & Version Number UIDevice *dev = [UIDevice currentDevice]; NSString *deviceUuid; if ([dev respondsToSelector:@selector(uniqueIdentifier)]) deviceUuid = dev.uniqueIdentifier; else { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; id uuid = [defaults objectForKey:@"deviceUuid"]; if (uuid) deviceUuid = (NSString *)uuid; else { CFStringRef cfUuid = CFUUIDCreateString(NULL, CFUUIDCreate(NULL)); deviceUuid = (NSString *)cfUuid; CFRelease(cfUuid); [defaults setObject:deviceUuid forKey:@"deviceUuid"]; } } Please help find the cause.

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• drawRect is not refreshing the screen

  - by coure06

  I have this code in my drawRect method float aValue = .0167f; float fValue = 20; for(int i=1; i<=6; i++) { CGContextSelectFont(context, "Arial", fValue, kCGEncodingMacRoman); CGContextSetCharacterSpacing(context, 0); CGContextSetTextDrawingMode(context, kCGTextFill); NSString *hString = [[NSString alloc] initWithFormat:@"%i",i]; CGContextSetRGBFillColor(context, 1, 1, 1, aValue); CGContextShowTextAtPoint(context, i*25, i*16, [hString UTF8String], [hString length]); aValue += 0.167; fValue += 1; } I am calling a method using NSTimer like this staticTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(refreshUIView) userInfo:nil repeats:YES]; here is the refreshUIView -(void)refreshUIView { [self setNeedsDisplay]; } Problem is that drawRect is not clearing the screen, its just over writing what have been written last time on screen.

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• release vs setting-to-nil to free memory

  - by Dan Ray

  In my root view controller, in my didReceiveMemoryWarning method, I go through a couple data structures (which I keep in a global singleton called DataManager), and ditch the heaviest things I've got--one or maybe two images associated with possibly twenty or thirty or more data records. Right now I'm going through and setting those to nil. I'm also setting myself a boolean flag so that various view controllers that need this data can easily know to reload. Thusly: DataManager *data = [DataManager sharedDataManager]; for (Event *event in data.eventList) { event.image = nil; event.thumbnail = nil; } for (WondrMark *mark in data.wondrMarks) { mark.image = nil; } [DataManager sharedDataManager].cleanedMemory = YES; Today I'm thinking, though... and I'm not actually sure all that allocated memory is really being freed when I do that. Should I instead release those images and maybe hit them with a new alloc and init when I need them again later?

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• Remove year component from NSDateFormatter style

  - by JK

  I would like to present a date in the kCFDateFormatterFullStyle, but without the year. Is there any way to remove the year component from this style? My app requires localization so practically I cannot programmatically set the format string for all locales. I have come accross a solution which removes the "y" characters from the format string returned by the built in styles. Unfortunately, this is not acceptable as the year components are not represented by "y" in some other languages like Japanese. Any suggestions to get the kCFDateFormatterFullStyle without the year would be great! Thanks.

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• Real world goods in iPhone app?

  - by Moshe

  I've seen questions asked here before, but they do not address the issue. That said: "In App Purchases" specifically may not be real world goods or services, according to Apple. What services allow integration with iPhone apps so that I can use ObjectiveC to sell things in an iPhone app?

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• CGContextShowTextAtPoint: invalid context

  - by coure06

  I want to call a method responsible for drawing text on screen after each 5 seconds. Here is my code -(void) handleTimer: (NSTimer *)timer { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 2.0); CGContextSetStrokeColorWithColor(context, currentColor.CGColor); CGContextTranslateCTM(context, 145.0, 240.0); CGContextScaleCTM(context, 1.0, -1.0); CGContextSelectFont(context, "Arial", 18, kCGEncodingMacRoman); CGContextSetCharacterSpacing(context, 1); CGContextSetTextDrawingMode(context, kCGTextFillStroke); CGContextSetRGBStrokeColor(context, 0.5,0.5,1,1); CGContextShowTextAtPoint(context, 100, 100, "01", 2); } But after 5 seconds when this method is called i am getting this error CGContextShowTextAtPoint: invalid context Another thing is how to show a thinner font?

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• Reading in a 5000 line text file on the Iphone

  - by howsyourface

  Gday, I am trying to create a tiled map for my game, i have had this previously working using other xml methods but i had memory leaks and all sorts of errors. However i had a map load time of about 2.5 - 3 seconds. So i rewrote all of the code using NSMutableStrings and NSStrings. After my best attempt at optomizing it i had a map load time of 10 - 11 seconds, which is far too slow. So i have now rewritten the code using char* arrays, only to now have a load time of 18 seconds -_-. Here is the latest code, i don't know much c so i could have easily botched the whole thing up. FILE* file = fopen(a, "r"); fseek(file, 0L, SEEK_END); length = ftell(file); fseek(file,0L, SEEK_SET); char fileText[length +1]; char buffer[1024];// = malloc(1024); while(fgets(buffer, 1024, file) != NULL) { strncat(fileText, buffer, strlen(buffer)); } fclose(file); [self parseMapFile:fileText]; - (void)parseMapFile:(char*)tiledXML { currentLayerID = 0; currentTileSetID = 0; tileX = 0; tileY = 0; int tmpGid; NSString* tmpName; int tmpTileWidth; int tmpTileHeight; int tilesetCounter = 0; NSString* tmpLayerName; int tmpLayerHeight; int tmpLayerWidth; int layerCounter = 0; tileX = 0; tileY = 0; int tmpFirstGid = 0; int x; int index; char* r; int counter = 0; while ((x = [self findSubstring:tiledXML substring:"\n"]) != 0) { counter ++; char result[x + 1]; r = &result[0]; [self substringIndex:tiledXML index:x newArray:result]; tiledXML += x+2; index = 0; if (counter == 1) { continue; } else if (counter == 2) { char result1[5]; index = [self getStringBetweenStrings:r substring1:"th=\"" substring2:"\"" newArray:result1]; if (r != 0); mapWidth = atoi(result1); r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"ht=\"" substring2:"\"" newArray:result1]; if (r != 0); mapHeight = atoi(result1); r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"th=\"" substring2:"\"" newArray:result1]; if (r != 0); tileWidth = atoi(result1); r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"ht=\"" substring2:"\"" newArray:result1]; if (r != 0); tileHeight = atoi(result1); continue; } char result2[50]; char result3[3]; if ((index = [self getStringBetweenStrings:r substring1:" gid=\"" substring2:"\"" newArray:result3]) != 0) { tmpGid = atoi(result3); free(result2); if(tmpGid == 0) { [currentLayer addTileAtX:tileX y:tileY tileSetID:-1 tileID:0 globalID:0]; } else { [currentLayer addTileAtX:tileX y:tileY tileSetID:[currentTileSet tileSetID] tileID:tmpGid - [currentTileSet firstGID] globalID:tmpGid]; } tileX ++; if (tileX > [currentLayer layerWidth]-1) { tileY ++; tileX = 0; } } else if ((index = [self getStringBetweenStrings:r substring1:"tgid=\"" substring2:"\"" newArray:result2]) != 0) { tmpFirstGid = atoi(result2); r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"me=\"" substring2:"\"" newArray:result2]; if (r != 0); tmpName = [NSString stringWithUTF8String:result2]; r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"th=\"" substring2:"\"" newArray:result2]; if (r != 0); tmpTileWidth = atoi(result2); r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"ht=\"" substring2:"\"" newArray:result2]; if (r != 0); tmpTileHeight = atoi(result2); } else if ((index = [self getStringBetweenStrings:r substring1:"rce=\"" substring2:"\"" newArray:result2]) != 0) { currentTileSet = [[TileSet alloc] initWithImageNamed:[NSString stringWithUTF8String:result2] name:tmpName tileSetID:tilesetCounter firstGID:tmpFirstGid tileWidth:tmpTileWidth tileHeight:tmpTileHeight spacing:0]; [tileSets addObject:currentTileSet]; [currentTileSet release]; tilesetCounter ++; } else if ((index = [self getStringBetweenStrings:r substring1:"r name=\"" substring2:"\"" newArray:result2]) != 0) { tileX = 0; tileY = 0; tmpLayerName = [NSString stringWithUTF8String:result2]; r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"th=\"" substring2:"\"" newArray:result2]; if (r != 0); tmpLayerWidth = atoi(result2); r += index +1; index = 0; index = [self getStringBetweenStrings:r substring1:"ht=\"" substring2:"\"" newArray:result2]; if (r != 0); tmpLayerHeight = atoi(result2); currentLayer = [[Layer alloc] initWithName:tmpLayerName layerID:layerCounter layerWidth:tmpLayerWidth layerHeight:tmpLayerHeight]; [layers addObject:currentLayer]; [currentLayer release]; layerCounter ++; } } } -(void)substringIndex:(char*)c index:(int)x newArray:(char*)result { result[0] = 0; for (int i = 0; i < strlen(c); i++) { result[i] = c[i]; if (i == x) { result[i+1] = '\0'; break; } } } -(int)findSubstring:(char*)c substring:(char*)s { int sCounter = 0; int index = 0; int d; for (int i = 0; i < strlen(c); i ++) { if (i > 500)//max line size break; if (c[i] == s[sCounter]) { d = strlen(s); sCounter ++; if (d > sCounter) { } else { index = i - (d); break; } } else sCounter = 0; } return index; } -(int)getStringBetweenStrings:(char*)c substring1:(char*)s substring2:(char*)s2 newArray:(char*)result { int sCounter = 0; int sCounter2 = 0; int index = 0; int index2 = 0; int d; for (int i = 0; i < strlen(c); i ++) { if (index != 0) { if (c[i] == s2[sCounter2]) { d = strlen(s2); sCounter2 ++; if (d > sCounter2) { } else { index2 = i - (d); break; } } else sCounter2 = 0; } else { if (c[i] == s[sCounter]) { d = strlen(s); sCounter ++; if (d > sCounter) { } else { index = i; } } else sCounter = 0; } } if (index != 0 && index2 != 0) [self substringIndex:(c + index+1) index:index2-index-1 newArray:result]; return index; } (I know it's a lot of code to be putting in here) I thought the by using basic char arrays i could drastically increase the performance, at least over the initial node based code that i was replacing. Thanks for all your efforts.

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• iPhone Core data - Not constant path between entities

  - by ncohen

  Hi everyone, I have an entity which has relationships with other entities. Let say we have: user-menu-meal My problem is that some of the users don't have a menu. So when I try to check: user.menu.meal == rice I get an error (path not found...)! Thank you for your help!

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