iphone-sdk-3.0

I am not able to get NSUserDefaults concepts properly. Is that a database of plist file ? It's a key-value store that is persisted between restarts of your application. How it's implemented has little bearing on how you use it. I don't know if it's different on the iPhone OS (which i don't believe) but in Mac OS X is it a plist file in your Library/Preferences folder. Pretty sure it's the same on iPhone OS/iOS 来源： https://stackoverflow.com/questions/3178115/iphones-nsuserdefaults-is-a-database-or-plist

I don't want my app to run on an iPhone or iPod with any OS prior to 3.0. I was under the impression that the App store would take care of it for me, but I don't think that is the case. What is the best way to alert the user and then quit? Preferably, I'd like this to happen before the user purchases my app, but if the fact is that a user has my app, and an old iPod or iPhone, I need to keep the app from crashing. Henrik P. Hessel You can check for float version = [[[UIDevice currentDevice] systemVersion] floatValue]; and then display a UIAlertView. But the App won't even start, because OS

Im quite new to iphone development, I want to create a mutable array which can access and populate from different view controllers. How can I do it? If you can please give me a sample code In most cases its not needed nor helpfull to use global variables. If you have to use them the easiest way is to put the array in your AppDelegate. You can access the Array (named array in AppDelegate here) with : YourAppDelegate *appDelegate = (YourAppDelegate *)[[UIApplication sharedApplication] delegate]; NSArray *aArray= [appDelegate array]; In MVC, you have views, controllers and models. You should push

i used this code to show uipicker in uiactionsheet but when i click close button i want to remove action sheet from view. so what should be the code for removing actionSheet form view. - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField { UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:nil cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil]; [actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent]; CGRect pickerFrame = CGRectMake(0, 40, 0, 0); pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame]; pickerView

I have a requirement where i am showing actionSheet but in case user does not dismiss this actionsheet by selecting one of the option, i want to dismiss this automatically by program on a particular event. Any idea guys, how can i dismiss this actionsheet progratically? klaaspieter Use: - (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated 来源： https://stackoverflow.com/questions/1551587/how-to-dismiss-uiactionsheet-automatically

How can I self-sign an iPhone application using XCode? I have done the following: Created a cert following these instructions Modified my /Developer/Platforms/iPhoneOS.platform/Info.plist to include the two keys <key>PROVISIONING_PROFILE_ALLOWED</key> <string>NO</string> <key>PROVISIONING_PROFILE_REQUIRED</key> <string>NO</string> I have changed the info.plist associated with the project to say <key>SignerIdentity</key> <string>Apple iPhone OS Application Signing</string> I have changed the project properties to refer to the signing authority with the name iPhone Developer, which is the name

I need to access the iphone APIs to read a multipage TIFF image file format, dose anyone know how:, if not how can I build and use the open source libtiff on iphone/xcode. I've created my own solution for this: NSTiffSplitter . You can find it on github . NSString *pathToImage = [[NSBundle mainBundle] pathForResource:@"Example" ofType:@"tiff"]; NSTiffSplitter* splitter = [[NSTiffSplitter alloc] initWithPathToImage:pathToImage]; UIImage *page = [[UIImage alloc] initWithData:[splitter dataForImage:page]]; yourImageView.image = page; [page release]; 来源： https://stackoverflow.com/questions/3332981

How do I get hold of all the *.bmp files (or *.xyz in general) in my Document folder, writing an iPhone 3.0 SDK? You need to use NSFileManager 's contentsOfDirectoryAtPath:error: function. Note that this does not traverse subdirectories and extension cannot contain a . . -(NSArray *)findFiles:(NSString *)extension { NSMutableArray *matches = [[NSMutableArray alloc]init]; NSFileManager *manager = [NSFileManager defaultManager]; NSString *item; NSArray *contents = [manager contentsOfDirectoryAtPath:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] error:nil]; for (item in contents)