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  • NSPredicate confusion. Ignoring spaces.

    - by Mr. McPepperNuts
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name contains [cd] %@", passdTextToSearchFor]; I have two entries in name: "Test One" and "Test Two." If I search for "test," I get 0 results. But if I search for "test one" or "test two" I get the proper result. The search is ignoring the space. In reality I want both results if the user searches for "test." Any ideas? I tried contain and like.

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  • Function should return float, but it gets messed up!

    - by Andre
    Hi guys, I'm going crazy here. I have a function that should return a float number: - (float) getHue:(UIColor *)original { NSLog(@"getHue"); const CGFloat *componentColors = CGColorGetComponents(original.CGColor); float red = componentColors[0]; float green = componentColors[1]; float blue = componentColors[2]; float h = 0.0f; float maxChannel = fmax(red, fmax(green, blue)); float minChannel = fmin(red, fmin(green, blue)); if (maxChannel == minChannel) h = 0.0f; else if (maxChannel == red) h = 0.166667f * (green - blue) / (maxChannel - minChannel) + 0.000000f; else if (maxChannel == green) h = 0.166667f * (blue - red) / (maxChannel - minChannel) + 0.333333f; else if (maxChannel == blue) h = 0.166667f * (red - green) / (maxChannel - minChannel) + 0.666667f; else h = 0.0f; if (h < 0.0f) h += 1.0f; NSLog(@"getHue results: %f", h); return h; } The NSLog will trace it correctly (i.e: 0.005), but the actual return value of the function is NULL. I've tried getting that value in so many ways and it never works. float originalHue = [self getHue:original]; results in a building error, as it says: "incompatible types in initialization" float *originalHue = [self getHue:original]; results in a null return. I've tried other ways, but it never actually gets the value properly. Any thoughts? Cheers guys, Andre

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  • openGL ES retina support

    - by Bryan
    I'm trying to get the avTouch sample code app to run on the retina display. Has anyone done this? In the CALevelMeter class, I've tried the following: - (id)initWithCoder:(NSCoder *)coder { if (self = [super initWithCoder:coder]) { CGFloat f = self.contentScaleFactor; if ([self respondsToSelector:@selector(contentScaleFactor)]) { self.contentScaleFactor = [[UIScreen mainScreen] scale]; } f = self.contentScaleFactor; _showsPeaks = YES; _channelNumbers = [[NSArray alloc] initWithObjects:[NSNumber numberWithInt:0], nil]; _vertical = NO; _useGL = YES; _meterTable = new MeterTable(kMinDBvalue); [self layoutSubLevelMeters]; [self registerForBackgroundNotifications]; } return self; } and it sets the contentScaleFactor to "2". Great, that was expected. But then in the layoutSubviews, CALevelMeter frame is still 1/2 of what it should be. Any ideas?

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  • Inconsistent Frame / Bounds of UIImage and UIScrollView

    - by iFloh
    this one puzzles me. I have an Image with a width of 1600 pixels and height of 1819 pixels. I load the image as UIImageView into an UIScrollView and set the "contentsize parameter" iKarteScrollView.contentSize = CGSizeMake(iKarteImageView.bounds.size.width, iKarteImageView.bounds.size.height); NSLog(@"Frame - width %.6f, height %.6f - Bounds - width %.6f, height %.6f", myImageView.frame.size.width, myView.frame.size.height, myImageView.bounds.size.width, myImageView.bounds.size.height); NSLog(@"Content size width %.6f, height %.6f", myScrollView.contentSize.width, myScrollView.contentSize.height); The NSLog shows the following: Frame - width 1600.000000, height 1819.000000 - Bounds - width 1600.000000, height 1819.000000 Content size width 1600.000000, height 1819.000000 Now comes the miracle, in a subsequent method of the same object I call the same NSLog again. But this time the result is Frame - width 405.000000, height 411.000000 - Bounds - width 1601.510864, height 1625.236938 Content size width 404.617920, height 460.000000 Why is the frame size suddely 405 by 411 pixels? How can the Bounds be 1601 by 1625 where 1625 is roughly 200 pixels less than the original size? When Positioning a further UIImageView at the coordinates of 20 by 1625, the UIImageView is displayed an estimated 200 pixels above the bottom of the content of the UIScrollView. I'm lost ...

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  • OpenGL ES displaying HUD display Text can't be colored black on top of textured 3D objects

    - by ivanceras
    This is a follow-up of this question on here http://iphonedevelopment.blogspot.com/2010/02/drawing-hud-display-in-opengl-es.html It tackles on the HUD (heads up display) which is based on this tutorial http://stackoverflow.com/questions/2681102/opengl-es-displaying-hud-display-has-no-color-on-top-of-textured-3d-objects I wanted to set the "Text" in color BLACK, but it is more complicated than what I thought. Setting it to some other color other than black "glColor4f(0.0, 0.0, 0.0, 1.0);" is just fine. I assume that the culprit must be in the Blending function "glBlendFunc (GL_ONE, GL_ONE);" I experimented a lot of combinations with no luck. Has anyone experimented on this one on top of textured 3D in the backgrounds working?

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  • -webkit-transition-property for translation

    - by sexyprout
    Hai. What is the transition property for translations in CSS3? I'm currently using all but I got a bug in iOS so I want to test another property. -webkit-transform: translate(-320px, 0);   -webkit-transition: ??? .5 ease-in-out; See the bug with an iOS device here (swipe horizontally), there's a kind of flash. Update: to anyone interested, I found a way to fix it thanks to Duopixel: E { -webkit-transition: all .5s ease-in-out; -webkit-transform: translate3d(0, 0, 0); // perform an "invisible" translation } // Then you can translate with translate3d(), no bug! document.querySelector('E').webkitTransform = 'translate3d(-320px, 0, 0)'

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  • Problem with NSMutableArray

    - by zp26
    Hi, I have a problem with NSMutableArray. In my program i have a lot of variabile "CFSocketRef". i want to save this in NSMutableArray but i can't. Can you help me? Thank and sorry for my english XP My code: CFSocketRef socketAccept; NSMutableArray *arrayIP = [[NSMutableArray alloc] init]; self.socketAccept = CFSocketCreateWithNative(NULL, fd, kCFSocketDataCallBack, AcceptDataCallback, &context); [arrayIP addObject:(id)self.socketAccept];

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  • Have you considered doing revenue sharing to fund development of a mobile app? How would you do it?

    - by Brennan
    I am looking to build multiple mobile apps which leverage existing content and resources by enabling these mobile apps with web services. I will duplication much of the same features which are also in place and add more features that are possible on a mobile device like address book, maps and calendar integration to make the service much more useful. To fund these projects I see that I have 2 options. First I could simply quote them for the project based on my hourly rate and the estimate in hours that I will take the to complete the job. That may be a high number. The second option would be to do shared revenue with ads placed in the app. I could then take a percentage of any revenue that is generated from the app. There is also a hybrid where I might charge for a percentage of the estimated quote and then take a percentage of the revenue sharing. So my question is how much should I propose for the revenue sharing? Should it be 30%? Or maybe I should make it 70% up to a point that a certain dollar amount is reached? And should the revenue sharing agreement be for 12 months, 24 months or more? Should I include in the proposal an agreement that they will help promote this app with their content and resources? Ultimately this system will benefit both sides because it extends their reach into the mobile space instead of where they are currently with just print and web. I have tried to find some examples with a few Google searches but I keep hitting content about the Google and Apple revenue sharing models. I would like to get some solid examples that are working to compare against so that my proposal do build these apps is not completely off base.

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  • Enable editing does not call didSelectRowAtIndexPath ??

    - by elementsense
    Hi I have a UITableViewController where the user should be able to edit the items. In order to enable editing i use this : self.navigationItem.rightBarButtonItem = self.editButtonItem; And for everyone, how does not know where self.editButtonItem comes from, it is predefined by the SDK. So, now when I press on any item, this method is called : - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath but as soon as I hit the edit button and while editing is active, this method does not seemed to be called. Any idea what I missing ? This is the rest of the code that is related to editing : // Override to support conditional editing of the table view. - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the specified item to be editable. return YES; } - (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { return UITableViewCellEditingStyleNone; } - (BOOL)tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath { return NO; } Thanks for the help. mcb

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  • How to use the asin() function in objective c

    - by Daniel Thatcher
    I am trying to use the asin() function in an iOS app to calculate an angle from the y axis. I am using trigonometry, but I must be doing something wrong with the asin() function, as when I try to pass in 0.707.... as asin(rotation) where rotation is a double equivalent to 0.707..., I get around 0.78....., where as my calculator gives me 44.991..., which is about correct from the variables passed in. What am I doing wrong, please can somebody help me?

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  • How we Can post Video and Image in ASIHTTPRequest ?

    - by GhostRider
    I want to post one image to my webservice and one video too , but problem is that when it go to video part it give me Excess-bad Error NSString *url = [NSString stringWithFormat:@"http://example.com/add_videoxml.php"]; networkQueue = [[ASINetworkQueue alloc] init]; [networkQueue cancelAllOperations]; [networkQueue setShowAccurateProgress:YES]; //[networkQueue setUploadProgressDelegate:progressBar]; [networkQueue setDelegate:self]; [networkQueue setRequestDidFinishSelector:@selector(requestFinished:)]; [networkQueue setRequestDidFailSelector: @selector(requestFailed:)]; request= [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:url]] ; [request setPostValue:@"284" forKey:@"id"]; [request setPostValue:@"show" forKey:@"show"]; [request addRequestHeader:@"Content-Type" value:@"multipart/form-data;boundary=---------------------------1842378953296356978857151853"]; NSData *imgData=UIImageJPEGRepresentation(userImage, 0.9); if(imgData != nil){ [request setFile:imgData withFileName:@"Loveatnight" andContentType:@"image/jpeg" forKey:@"image"]; } //[request addRequestHeader:@"Content-Type" // value:@"multipart/form-data;boundary=---------------------------1842378953296356978857151853"]; if(videoData != nil){ [request setFile:videoData withFileName:@"Loveishard" andContentType:@"image/jpeg" forKey:@"uploadfile"]; }// error is come on that line [request setTimeOutSeconds:500]; //NSLog(@"%@",request); [networkQueue addOperation:request]; [networkQueue go]; Added by the OP [request setFile:videoData withFileName:@"Loveishard" andContentType:@"video/quicktime" forKey:@"uploadfile"]; i use this becuase my video formate is mov , but it again give error

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  • Cocoa - does CGDataProviderCopyData() actually copy the bytes? Or just the pointer?

    - by jtrim
    I'm running that method in quick succession as fast as I can, and the faster the better, so obviously if CGDataProviderCopyData() is actually copying the data byte-for-byte, then I think there must be a faster way to directly access that data...it's just bytes in memory. Anyone know for sure if CGDataProviderCopyData() actually copies the data? Or does it just create a new pointer to the existing data?

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  • What is the proper location for a sqlite3 database file?

    - by Elliot Chen
    Hi, Everyone: I'm using a sqlite3 database to store app's data. Instead of building a database within program, I introduced an existing db file: 'abc.sqlite' into my project and put it under my 'Resources' folder. So, I think this db file should be inside of 'bundle', so at my init function, I used following statement to read it out: NSString *path = [[NSBundle mainBundle] pathForResource:@"abc" ofType:"sqlite"]; if(sqlite3_open([path UTF8String], &database) != SQLITE_OK) ... It's ok that this db can be opened and data can be retrieved from it. BUT, someone told me that it's better to copy this db file into user folder: such as 'Document'. So, my question is: is it ok to use this db from main bundle directly or copy it to user folder then use that copy. Which is better? Thank you very much!

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  • SQLITE Blob OR file system for images

    - by saint cyr
    Hello, I am building an application based on a single table with a column with text. Occassionally, an adjacent column will have an image. Is it better to store this image as a BLOB in SQLITE or should I store them on the file system and reference them from my programs. Thanks!

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  • Problem with close socket

    - by zp26
    Hi, I have a problem with my socket program. I create the client program (my code is below) I have a problem when i close the socket with the disconnect method. Can i help me? Thanks and sorry for my English XP CFSocketRef s; -(void)CreaConnessione { CFSocketError errore; struct sockaddr_in sin; CFDataRef address; CFRunLoopSourceRef source; CFSocketContext context = { 0, self, NULL, NULL, NULL }; s = CFSocketCreate( NULL, PF_INET, SOCK_STREAM, IPPROTO_TCP, kCFSocketDataCallBack, AcceptDataCallback, &context); memset(&sin, 0, sizeof(sin)); int port = [fieldPorta.text intValue]; NSString *tempIp = fieldIndirizzo.text; const char *ip = [tempIp UTF8String]; sin.sin_family = AF_INET; sin.sin_port = htons(port); sin.sin_addr.s_addr = (long)inet_addr(ip); address = CFDataCreate(NULL, (UInt8 *)&sin, sizeof(sin)); errore = CFSocketConnectToAddress(s, address, 0); if(errore == 0){ buttonInvioMess.enabled = TRUE; fieldMessaggioInvio.enabled = TRUE; labelTemp.text = [NSString stringWithFormat:@"Connesso al Server"]; CFRelease(address); source = CFSocketCreateRunLoopSource(NULL, s, 0); CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopDefaultMode); CFRelease(source); CFRunLoopRun(); } else{ labelTemp.text = [NSString stringWithFormat:@"Errore di connessione. Verificare Ip e Porta"]; switchConnection.on = FALSE; } } //the socket doesn't disconnect -(void)Disconnetti{ CFSocketInvalidate(s); CFRelease(s); } -(IBAction)Connetti { if(switchConnection.on) [self CreaConnessione]; else [self Disconnetti]; }

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  • UItableView Problem in deleting items from database

    - by Arun Sharma
    Hi All, I am using in UitableView database.My table view works successfully (add single item,add multiple item,delete all) only problem is there when i want to delete single item for this i using Uitableview edit option. so how i add database method for deleting single item from database and also from table view. Please help me.

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  • Using (void)awakeFromNib

    - by MN
    I am trying to run an action when the application starts. The action checkAtStart is supposed to display an alert if there is no text in field1 and hide startView if there is text in field1. checkAtStart works fine if assigned to a button, but when I try to run it using (void)awakeFromNib, the alert will display no matter what and startView will never hide. Its probably something really simple that I'm forgetting. Any help is appreciated! Here is my code: - (void)awakeFromNib { [self checkAtStart:self]; } - (IBAction)checkAtStart:(id)sender { if (field1.text == nil || [field1.text isEqualToString:@""]) { NSString *msg = nil; msg = nil; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Test Message" message:@"Test Message" delegate:self cancelButtonTitle:@"Close" otherButtonTitles: nil]; [alert show]; [alert release]; [msg release]; } else { startView.hidden = YES; } }

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  • Save UIView's representation to file.

    - by fish potato
    What is the easiest way to save UIView's representation to file? My solution is, UIGraphicsBeginImageContext(someView.frame.size); [someView drawRect:someView.frame]; UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); NSString* pathToCreate = @"sample.png"; NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(image)]; [imageData writeToFile:pathToCreate atomically:YES]; but it seems tricky, and I think there must be more efficient way to do this.

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  • Populate tableView with more than one array

    - by Ewoods
    The short version: Is there a way to populate one specific row in a tableView with one value from one array, then populate another row in that same tableView with one value from a different array? For example, cell 1 would have the first value from Array A, cell 2 would have the first value from Array B, cell 3 would have the first value from Array C, etc. The long version: I hope this isn't too confusing. I've got an array of names, and then three more arrays with actions associated with those people. For example, the names array has Jim, Bob, and Sue, and then there's an array for eating, reading, and sleeping that records every time each person does one of these things (all of these arrays are populated from a MySQL database). The names array is used to populate a root tableView. Tapping on one of the names brings up a detail view controller that has another tableView that only has three rows. This part is all working fine. What I want to happen is when I tap on a name, it moves to the detail view and the three cells would then show the last event for that person for each of the three activities. Tapping on one of those three events then moves to a new view controller with a tableView that shows every event for that category. For example, if I tapped on Bob, the second page would show the last time Bob ate, read, and slept. Tapping on the first row would bring up a table that showed every time Bob has eaten. So far I've only been able to populate the second tableView with all of the rows from one of the arrays. I need it the other way around (one row from all of the arrays).

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  • Custom UISlider Image not responding?

    - by Silent
    Hello all i have a custom image to replace the UISLider defult button image, all works fine image shows, it does not clip off. The problem is when i use the slider to move up and down the image dissapears and some how doesnt show up anymore only sometimes. could someone have a fix?

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  • is it possible to adjust position x,y titleLabel of UIButton ?

    - by RAGOpoR
    here is my code UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [btn setFrame:CGRectMake(0.0f, 0.0f, 100.0f, 100.0f)]; [btn setTitle:[NSString stringWithFormat:@"Button %d", i+1] forState:UIControlStateNormal]; [btn addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside]; btn.titleLabel.frame = ???

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  • rotating circle with swipe question

    - by Joe
    Okay so I'm making something that basically works as a knob, but only half on the screen -- so I just need horizontal swipes to cause it to rotate. I have it nearly all sorted with one exception: if you change direction of your swipe in mid-swipe, the rotation doesn't change direction. I even can see the problem, but not sure what to do about a solution. So in my touchesMoved, I get the swipe into radians in the predictable way: CGFloat radians = atan2f(location.y - centerY, location.x - centerX); I then store radians, add/subtract it to previous rotation and then give the result to the CATransform3D. So the prob is that even though the swipe changes direction, there is a "balance" which doesn't allow an immediate change of direction. Does this make any sense?

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  • Graphical glitches when adding cells and scrolling with UITableView

    - by Daniel I-S
    I am using a UITableView to display the results of a series of calculations. When the user hits 'calculate', I wish to add the latest result to the screen. This is done by adding a new cell to a 'results' section. The UITableViewCell object is added to an array, and then I use the following code to add this new row to what is displayed on the screen: [thisView beginUpdates]; [thisView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation: UITableViewRowAnimationFade]; [thisView endUpdates]; This results in the new cell being displayed. However, I then want to immediately scroll the screen down so that the new cell is the lowermost cell on-screen. I use the following code: [thisView scrollToRowAtIndexPath:newIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES]; This almost works great. However, the first time a cell is added and scrolled to, it appears onscreen only briefly before vanishing. The view scrolls down to the correct place, but the cell is not there. Scrolling the view by hand until this invisible new cell's position is offscreen, then back again, causes the cell to appear - after which it behaves normally. This only happens the first time a cell is added; subsequent cells don't have this problem. It also happens regardless of the combination of scrollToRowAtIndexPath and insertRowsAtIndexPath animation settings. There is also a problem where, if new cells are added repeatedly and quickly, the new cells stop 'connecting up'. The lowermost cell in a group is supposed to have rounded corners, and when a new cell is added these turn into square corners so that there is a clean join with the next cell in the group. In this case, however, a cell often does not lose its rounded edges despite not being the last cell anymore. This also gets corrected once the affected area moves offscreen and back. This method of adding and scrolling would be perfect for my application if it weren't for these weird glitches. Any ideas as to what I may be doing wrong?

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