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  • What's CFRunLoop?

    - by Boon
    I would like to understand run loop more in-depth than what the reference provides. Is there resources out there that discuss this in greater details?

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  • I want to get the value from one class (SearchTableViewController.m) to another class (HistoryTableV

    - by ahmet732
    #import <UIKit/UIKit.h> @class SearchDetailViewController; @interface SearchTableViewController : UITableViewController <UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource>{ IBOutlet UITableView *myTableView; NSMutableArray *tableData;//will be storing data that will be displayed in table. //Search array den buna aktarma yapcaz ilerde görceksin. NSMutableArray *searchedData;//will be storing data matching with the search string UISearchBar *sBar;//search bar NSMutableArray *searchArray; // It holds the medicines that are shown in tableview SearchDetailViewController * searchDetailViewController; NSMutableArray *deneme; } @property(nonatomic,retain)UISearchBar *sBar; @property(nonatomic,retain)IBOutlet UITableView *myTableView; @property(nonatomic,retain)NSMutableArray *tableData; @property(nonatomic,retain)NSMutableArray *searchedData; @property (nonatomic, retain) NSMutableArray *searchArray; @property (nonatomic, retain) SearchDetailViewController *searchDetailViewController; @property (nonatomic, copy) NSMutableArray *deneme; @end SearchTableViewController.m - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Navigation logic may go here. Create and push another view controller. // AnotherViewController *anotherViewController = [[AnotherViewController alloc] initWithNibName:@"AnotherView" bundle:nil]; // [self.navigationController pushViewController:anotherViewController]; // [anotherViewController release]; **deneme= [[NSMutableArray alloc]init]; deneme=[tableData objectAtIndex:indexPath.row];** ****NSLog(@"my row = %@", deneme);**// I holded one of the selected cells here** HistoryTableViewController.m - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Navigation logic may go here. Create and push another view controller. // AnotherViewController *anotherViewController = [[AnotherViewController alloc] initWithNibName:@"AnotherView" bundle:nil]; // [self.navigationController pushViewController:anotherViewController]; // [anotherViewController release]; **SearchTableViewController *obj= [[SearchTableViewController alloc]init];** **NSLog(@"my 2nd row= %@", [obj deneme]); //it prints nil** } My project is TabBar. There are two buttons on it- Search and History. I want to display selected items in a table in History tab. But i can not bring the selected item from SearchTableViewController.m to the class (HistoryTableViewController.m) The problem is : I can hold one of the selected items in an array (named deneme)from table in SearchTableViewController.m but i can not take it to HistoryTableViewController.m. It prints nil in console screen.... If I can make it visible in History class, I display those selected items on table. Please help me !!!

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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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  • how to go back to previous screen in tableview?

    - by Rajendra Bhole
    Hi, My appliaction is viewbased application in which i have one button . On click of that button i will push to other screen that is table view screen on which what i want when i select any data from row in table view it will get back to previous view automatically instead of selecting the navigation back button generated automatically. Please help me out its urgent . Thanks in Advance

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  • Passing Data thru NSTimer UserInfo

    - by zorro2b
    I a trying to pass data thru userInfo for an NSTimer call. What is the best way to do this? I am trying to use an NSDictionary, this is simple enough when I have objective c objects, but what about other data? I want to do something like this, which doesn't work as is: - (void) play:(SystemSoundID)sound target:(id)target callbackSelector:(SEL)selector { NSLog(@"pause ipod"); [iPodController pause]; theSound = sound; NSMutableDictionary *cb = [[NSMutableDictionary alloc] init]; [cb setObject:(id)&sound forKey:@"sound"]; [cb setObject:target forKey:@"target"]; [cb setObject:(id)&selector forKey:@"selector"]; [NSTimer scheduledTimerWithTimeInterval:0 target:self selector: @selector(notifyPause1:) userInfo:(id)cb repeats:NO]; }

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  • Returning from method inside a @synchronized block

    - by Michael Waterfall
    I'd just like to know if it's advised to return from a method within a @synchronized block? For example: - (id)test { @synchronized(self) { if (a) return @"A"; else return @"B"; } } As opposed to: - (id)test { NSString *value; @synchronized(self) { if (a) value = @"A"; else value = @"B"; } return value; } This sample is rather simplistic, but sometimes in a complex method it would make things simpler to be able to return from within a @synchronized block.

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  • how to set imageview in webview

    - by mohsinpathan
    I am creating runtime images. i want to set that image in to web view. Please give me a hint or document.My source code is given below CGRect pdfSize = GetPdfSize(UIGraphicsGetCurrentContext(), initialPage, [filePath UTF8String],myTable,mainString); //UIImageView *imgV=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 598,768)]; UIImageView *imgV=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, pdfSize.size.width,pdfSize.size.height)]; UIGraphicsBeginImageContext(CGSizeMake(pdfSize.size.width,pdfSize.size.height)); MyDisplayPDFPage(UIGraphicsGetCurrentContext(), initialPage, [filePath UTF8String],myTable,mainString); imgV.image=UIGraphicsGetImageFromCurrentImageContext(); imgV.image=[imgV.image rotate:UIImageOrientationDownMirrored];

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  • Making a view scrollable when keyboard active

    - by Dan Ray
    I have a view with half a dozen text fields and labels, and a button. I want it to be that when the keyboard pops up, the view becomes scrollable, so you can scroll the view up and see the bottom half of the fields without having to dismiss the keyboard to get to them. Just putting it inside a UIScrollView doesn't seem to do it.

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  • how can i write a Broadcast Receiver that will be invoked when user clicks on any application icon.

    - by chinnuthelearner
    hai every one, i have a query. how can i write a Broadcast Receiver that will be invoked when user clicks on any application icon. i tried by writing but it is not called. i tried, by using Packagemanager i will get ApplicationInfo from that i can know all the application starting activity name and package names. i thought i can use them to registerReceiver and my receiver will listen by its launching activity and package name. but i strucked.. i am unable to do that.. i think i lost the way.. please guide me...

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  • UILabel not changing when method called

    - by LyonJTill
    - (IBAction)restoreUserDefaults { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; if([defaults objectForKey:@"Exam Name"] == nil) { examName = [[NSString alloc] initWithString:@"Name"]; } else { examName = [[NSString alloc] initWithString:[defaults objectForKey:@"Exam Name"]]; } [examNameLabel setText:[NSString stringWithFormat:@"%@",examName]]; } Hey all, Basically above is the method that is being called when one ViewController is being close and another is being opened the problem is, is that the UILabel in the new ViewController isn't changing to the value i need it to? Any ideas? Regards Lyon J Till

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  • setNeedsDisplayInRect: paints a white rectangle only

    - by Ion Tichy
    Hi, I'm still a little fresh to CoreGraphics programming, so please bear with me. I'm trying to write an application, which allows the user to rub stuff off an image with the finger. I have the basic functionality nailed down, but the result is sluggish since the screen is redrawn completely every time a touch is rendered. I did some research and found out that I can refresh only a portion of the screen using UIView's setNeedsDisplayInRect: method. This does call drawRect: as expected, however everything I draw in the drawRect: following the setNeedsDisplayInRect: is ignored. Instead, the area in the rect parameter is simply filled with white. No matter what I draw inside, all I end up with is a white rectangle. In essence, this is what I do: 1) when user touches screen, this touch is rendered into a mask 2) when the drawRect: is called, the image is masked with that mask There must be something simple I'm overlooking, surely?

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  • Segment a CGImage

    - by mag725
    Hi, In iOS 4.0 and later is there a way to segment a CGImage without loading the entire image into memory? What I am attempting to do is * programmatically* segment an image for use in a CATiledLayer application using large images, but I don't want to take up the memory involved in loading the full image. Also, is there a way to load that (or any) segment at a particular resolution, so if we are zoomed out from the image we can load that tile at a low level of detail, thus saving memory. Thanks! -Matt

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