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  • How to resize a UIPresentationFormSheet?

    - by Sheehan Alam
    I am trying to display a modal view controller as a UIPresentationFormSheet. The view appears, but I can't seem to resize it. My XIB has the proper height & width, but it seems to get overridden when I call it like this: composeTweetController = [[ComposeTweet alloc] initWithNibName:@"ComposeTweet" bundle:nil]; composeTweetController.modalPresentationStyle = UIModalPresentationFormSheet; [self presentModalViewController:composeTweetController animated:TRUE]; Any thoughts? I am using the iPhone SDK 3.2 beta 4

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  • dealloc on Background Thread

    - by Mark Brackett
    Is it an error to call dealloc on a UIViewController from a background thread? It seems that UITextView (can?) eventually call _WebTryThreadLock which results in: bool _WebTryThreadLock(bool): Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Background: I have a subclassed NSOperation that takes a selector and a target object to notify. -(id)initWithTarget:(id)target { if (self = [super init]) { _target = [target retain]; } return self; } -(void)dealloc { [_target release]; [super dealloc]; } If the UIViewController has already been dismissed when the NSOperation gets around to running, then the call to release triggers it's dealloc on a background thread.

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  • Synthesized property of a protocol not seeing superclass' ivar

    - by hyn
    I have a situation where my subclass is not seeing the superclass' instance variable x. The ivar is obviously @protected by default, so why do I get a compiler error "x undeclared"? - (CGSize)hitSize { // Compiler error return size; } EDIT: hitSize is a property of a protocol my subclass is conforming to. The problem was that I had hitSize @synthesized, which was the culprit. The question then is why can't the synthesized getter see the ivar?

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  • @property, setter and getter question?

    - by fuzzygoat
    NSString *statusValue; NSString *currentValue; @property(retain, nonatomic) NSString *statusValue; @property(retain, nonatomic) NSString *currentValue; @synthesize statusValue; @sythnesize currentValue; Given the above, if I am setting one variable to another is it work doing ... [self setStatusValue: currentValue]; or should I use the property again and use [self setStatusValue: [self currentValue]]; I suppose the latter (although maybe overkill) does tell the reader that we are using one of the objects instance variables and not some local variable. just curious really ... gary

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  • Public class: The best way to store and access NSMutableDictionary?

    - by meridimus
    I have a class to help me store persistent data across sessions. The problem is I want to store a running sample of the property list or "plist" file in an NSMutableArray throughout the instance of the Persistance class so I can read and edit the values and write them back when I need to. The problem is, as the methods are publicly defined I cannot seem to access the declared NSMutableDictionary without errors. The particular error I get on compilation is: warning: 'Persistence' may not respond to '+saveData' So it kind of renders my entire process unusable until I work out this problem. Here is my full persistence class (please note, it's unfinished so it's just to show this problem): Persistence.h #import <UIKit/UIKit.h> #define kSaveFilename @"saveData.plist" @interface Persistence : NSObject { NSMutableDictionary *saveData; } @property (nonatomic, retain) NSMutableDictionary *saveData; + (NSString *)dataFilePath; + (NSDictionary *)getSaveWithCampaign:(NSUInteger)campaign andLevel:(NSUInteger)level; + (void)writeSaveWithCampaign:(NSUInteger)campaign andLevel:(NSUInteger)level withData:(NSDictionary *)saveData; + (NSString *)makeCampaign:(NSUInteger)campaign andLevelKey:(NSUInteger)level; @end Persistence.m #import "Persistence.h" @implementation Persistence @synthesize saveData; + (NSString *)dataFilePath { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; return [documentsDirectory stringByAppendingPathComponent:kSaveFilename]; } + (NSDictionary *)getSaveWithCampaign:(NSUInteger)campaign andLevel:(NSUInteger)level { NSString *filePath = [self dataFilePath]; if([[NSFileManager defaultManager] fileExistsAtPath:filePath]) { NSLog(@"File found"); [[self saveData] setDictionary:[[NSDictionary alloc] initWithContentsOfFile:filePath]]; // This is where the warning "warning: 'Persistence' may not respond to '+saveData'" occurs NSString *campaignAndLevelKey = [self makeCampaign:campaign andLevelKey:level]; NSDictionary *campaignAndLevelData = [[self saveData] objectForKey:campaignAndLevelKey]; return campaignAndLevelData; } else { return nil; } } + (void)writeSaveWithCampaign:(NSUInteger)campaign andLevel:(NSUInteger)level withData:(NSDictionary *)saveData { NSString *campaignAndLevelKey = [self makeCampaign:campaign andLevelKey:level]; NSDictionary *saveDataWithKey = [[NSDictionary alloc] initWithObjectsAndKeys:saveData, campaignAndLevelKey, nil]; //[campaignAndLevelKey release]; [saveDataWithKey writeToFile:[self dataFilePath] atomically:YES]; } + (NSString *)makeCampaign:(NSUInteger)campaign andLevelKey:(NSUInteger)level { return [[NSString stringWithFormat:@"%d - ", campaign+1] stringByAppendingString:[NSString stringWithFormat:@"%d", level+1]]; } @end I call this class like any other, by including the header file in my desired location: @import "Persistence.h" Then I call the function itself like so: NSDictionary *tempSaveData = [[NSDictionary alloc] [Persistence getSaveWithCampaign:currentCampaign andLevel:currentLevel]];

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  • How to handle duplicate symbol error from 3rd party libraries?

    - by brettr
    I have two 3rd party libraries that seem to use the same class. That should be fine but I'm getting this type of error when building: ld: duplicate symbol .objc_class_name_CJSONScanner in /Users/myappOne/TapjoyConnect/Frameworks/libTapjoyConnectSimulatorRewardInstall_Ads_Pinch.a(CJSONScanner.o) and /Developer/Projects/BuildOutput/Debug-iphonesimulator/OtherLibrary_d.a(CJSONScanner.o) How can I handle this issue?

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  • Cocoa Touch best practice for capturing/logging/diagnosing crashes

    - by Dylan
    As I get closer to releasing my first public iPhone app I'm concerned about catching crashes in the field. I'm curious to hear how others have gone about this. I'm not sure what's possible outside of the debugger. Is all lost with an EXC_BAD_ACCESS or can I still catch it and get something useful into a log? Is the program main() the spot to put a @try/@catch?

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  • how to update UI controls in cocoa application from background thread

    - by AmitSri
    following is .m code: #import "ThreadLabAppDelegate.h" @interface ThreadLabAppDelegate() - (void)processStart; - (void)processCompleted; @end @implementation ThreadLabAppDelegate @synthesize isProcessStarted; - (void)awakeFromNib { //Set levelindicator's maximum value [levelIndicator setMaxValue:1000]; } - (void)dealloc { //Never called while debugging ???? [super dealloc]; } - (IBAction)startProcess:(id)sender { //Set process flag to true self.isProcessStarted=YES; //Start Animation [spinIndicator startAnimation:nil]; //perform selector in background thread [self performSelectorInBackground:@selector(processStart) withObject:nil]; } - (IBAction)stopProcess:(id)sender { //Stop Animation [spinIndicator stopAnimation:nil]; //set process flag to false self.isProcessStarted=NO; } - (void)processStart { int counter = 0; while (counter != 1000) { NSLog(@"Counter : %d",counter); //Sleep background thread to reduce CPU usage [NSThread sleepForTimeInterval:0.01]; //set the level indicator value to showing progress [levelIndicator setIntValue:counter]; //increment counter counter++; } //Notify main thread for process completed [self performSelectorOnMainThread:@selector(processCompleted) withObject:nil waitUntilDone:NO]; } - (void)processCompleted { //Stop Animation [spinIndicator stopAnimation:nil]; //set process flag to false self.isProcessStarted=NO; } @end I need to clear following things as per the above code. How to interrupt/cancel processStart while loop from UI control? I also need to show the counter value in main UI, which i suppose to do with performSelectorOnMainThread and passing argument. Just want to know, is there anyother way to do that? When my app started it is showing 1 thread in Activity Monitor, but when i started the processStart() in background thread its creating two new thread,which makes the total 3 thread until or unless loop get finished.After completing the loop i can see 2 threads. So, my understanding is that, 2 thread created when i called performSelectorInBackground, but what about the thrid thread, from where it got created? What if thread counts get increases on every call of selector.How to control that or my implementation is bad for such kind of requirements? Thanks

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  • Running out of memory but not seeing excessive object allocation in Instruments

    - by Scotty Allen
    I have an iPad app that's crashing due to low memory. However, Instruments doesn't show any significant amount of memory allocated using ObjectAlloc - it stays under 1MB for the lifetime of the application. Leaks shows less than 1kB leaked over the course of the run. Memory monitor shows the free memory on the devices drop significantly with use, eventually dropping to the point that it's out of memory. Here's a screenshot from Instruments: I'm totally stumped. As far as I can tell, this basically says that as far as my app is concerned, I'm never using more than about 750kB, but that the device is still running out of physical memory, which is causing my app to crash/force exit. I'm new to debugging memory issues with XCode. Am I measuring this wrong? Is there another way to see where this memory is going?

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  • Editing a UIViewController from another class.

    - by Guy
    I am trying to programmatically change the user interface of a UIViewController from another NSObject class. The problem is that I am unsure of how to access the UIViewController's view from the NSObject class. So for example, in my NSObject class, I say something like: self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; self.view.backgroundColor = [UIColor yellowColor]; but I keep getting errors saying "Request for member "view" in something not a strut or union." Is there something I need to allow my NSObject class to see my UIViewController? Thanks!

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  • I want to support UIInterfaceOrientationLandscapeRight and UIInterfaceOrientationLandscapeLeft only

    - by orangecl4now
    how do I make sure that UIInterfaceOrientationPortraitRight and UIInterfaceOrientationPortraitLeft are not supported. Basically I want my application to be used ONLY in UIInterfaceOrientationLandscapeRight and UIInterfaceOrientationLandscapeLeft I edited the Info.plist file MainWindow UISupportedInterfaceOrientations UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight

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  • Change the state of a customized button (button with an image)?

    - by Harry Pham
    I know how to change the state of the regular button, as well as change the background color of a regular button. However, what I have is a image lay on top of a button (customized button). I want, when the user click on it, something visually would happen to let the user know that button is selected, and when the user click again it go back to the regular state. I try to change the background of the button, but it doesnt work since the image kind of cover the button. Any idea?

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  • Threading questions

    - by JK
    If I spawn a secondary thread and the threaded method calls other methods, are those methods run in the secondary thread or the main thread? Is there a way to determine on which thread a specified piece of code is being run?

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  • forward invocation, by hand vs magically?

    - by John Smith
    I have the following two class: //file FruitTree.h @interface FruitTree : NSObject { Fruit * f; Leaf * l; } @end //file FruitTree.m @implementation FruitTree //here I get the number of seeds from the object f @end //file Fruit @interface Fruit : NSObject { int seeds; } -(int) countfruitseeds; @end My question is at the point of how I request the number of seeds from f. I have two choices. Either: Since I know f I can explicitly call it, i.e. I implement the method -(int) countfruitseeds { return [f countfruitseeds]; } Or: I can just use forwardInvocation: - (NSMethodSignature *)methodSignatureForSelector:(SEL)selector { // does the delegate respond to this selector? if ([f respondsToSelector:selector]) return [f methodSignatureForSelector:selector]; else if ([l respondsToSelector:selector]) return [l methodSignatureForSelector:selector]; else return [super methodSignatureForSelector: selector]; } - (void)forwardInvocation:(NSInvocation *)invocation { [invocation invokeWithTarget:f]; } (Note this is only a toy example to ask my question. My real classes have lots of methods, which is why I am asking.) Which is the better/faster method?

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  • Attributed strings in UITableViewCells without WebView?

    - by arnekolja
    Hello, does anyone know if there's a way in with 3.0+ to display attributed strings within a UITableViewCell without using a UIWebView for that? I need to display a string with linked, tappable substrings as the typical detailTextLabel. I wouldn't mind exchanging this UILabel against another type of view, but I think a UIWebView could be just too slow when rendering a table with hundrets of cells. Or does someone have opposite experiences here? So my question is: what's the best way to achieve mixed strings in a very large table without a great performance hit? I searched for this almost a whole day now, but I can only find old posts mentioning that there's no attributed string on the iPhone (outdated, as this was pre-3.0) and/or saying that they use a UIWebView for that. But really, I don't think this would perform very well on large tables, would it? Many, many thanks in advance Arne

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  • how i can display a NSDATA description not in hex but in human redeable text ?

    - by halba
    I'm writing an iphone apps that receive data from an udp socket i can dispay what i receive using NSDATA description but is in hex format and for example it look like this: <4c61742c 34343039 3131302e 35302c4c 6f6e2c39 38343237 352e3934 2c482c32 37392e30 302c4b6e 6f74732c 302e3032 2c4e616d 652c504c 41594552 2c496e64 65782c30 2c4d756c 7469706c 61796572 4e756d62 65722c30 00 i know that thi is a prase of compite sens how i can convert it ?

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  • NSCFArray leak in the NSMutablearray allocation

    - by Srilakshmi Manthena
    Hi, I am getting the leak at this allocation filteredListContent = [[NSMutableArray alloc] initWithCapacity: [showList count]]; CODE: -(void)reloadTable { EventListAppDelegate *appDelegate = (EventListAppDelegate *)[[UIApplication sharedApplication] delegate]; contactList = [appDelegate getAllContactsList]; inviteeList = [appDelegate getInviteeListForEvent:event.primaryKey]; if (isInvited == YES) { showList=[appDelegate getInviteeListForEvent:event.primaryKey]; } else { showList =[appDelegate getAllContactsList]; } filteredListContent = [[NSMutableArray alloc] initWithCapacity: [showList count]]; [filteredListContent addObjectsFromArray: showList]; [self organizeContactItemsIntoIndexes]; self.title = [event.name capitalizedString]; [self getToolbar]; [theTableView reloadData]; } (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { [filteredListContent removeAllObjects]; ContactDTO *currentElement; NSRange range; for (currentElement in showList) { range = [currentElement.lastName rangeOfString:searchText options:NSCaseInsensitiveSearch]; if(range.location==0) { [filteredListContent addObject:currentElement]; } } [self organizeContactItemsIntoIndexes]; [theTableView reloadData]; } (void)dealloc { [filteredListContent release]; [super dealloc]; }

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  • UIButton to be resized

    - by Sathiya
    I am using a UIButton in my application. This button title is displayed dynamically as per the user choice. Now i have to resize the button width as per the title content. I am calculating the string length and assigning it to button's width. the button is resized as per title but the problem is as follows, 1. If at first the title with large content is shown and after that if a title with a small content is shown means the button is overwritten it doesn't remove the previously constructed value. 2. it looks as if one button is overlapped on the another.

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