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  • How do I change the background image of my app?

    - by user356387
    Hello I have looked around and found some code which so called chooses an image from an array of image objects, but cant find an explanation. I would like to make my app have a background image and the user can select next and previous buttons to scroll through some full screen images, setting them as the background image as they scroll. I know how to do this in java, but cant seem to do it for this app. How or what code is linked to a next button to grab the next image in the array and reverse for the back button? Then that needs to be displayed obviously. I have used a layered architecture with a MVC style approach but cant seem to put it together with Objective-C. Would the buttons call the appropriate methods of the so called delegates, which the delegates handle fetching and returning the Images? Would the buttons use the returned images and actually handle the redrawing? I would really appreciate the help. Regards Jarryd

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  • 03/20/11 11:24 AM(MONTH/DATE/YEAR HOUR:MIN)

    - by The deals dealer
    I am using the below code: NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterFullStyle]; NSDate *today=[NSDate date]; NSString *string = [dateFormatter stringFromDate:today]; NSLog(@"%@",string); [dateFormatter release]; This will not give me this format 03/20/11 11:24 AM(MONTH/DATE/YEAR HOUR:MIN), if i convert system date and time so the converted string should have such type of information 03/20/11 11:24 AM(MONTH/DATE/YEAR HOUR:MIN).? What should i do?

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  • Downloading image from server without file extension (NSData to UIImage)

    - by Msencenb
    From my server I'm pulling down a url that is supposed to simply be a profile image. The relevant code for pulling down the image from the urls is this: NSString *urlString = [NSString stringWithFormat:@"%@%@",kBaseURL,profile_image_url]; profilePic = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]]]; My url is in the format (note no file extension on the end since its dynamically rendered) localhost:8000/people/1/profile_image If I load the url in my browser the image displays; however the code above for pulling down the UIImage does not work. I've verified that the code does pull an image from a random site on the interwebs. Any thoughts on why this is happening?

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  • deleteRowsAtIndexPaths- crahes application [closed]

    - by Tushar Chutani
    (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { NSLog(@"delet it"); // Delete the row from the data source. [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES]; } else if (editingStyle == UITableViewCellEditingStyleInsert) { // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view. } } why is this crashing my application

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  • Can we use (id) in if- else condition ?

    - by srikanth rongali
    I have written my code in following way in cocos2d. id actionTo = [CCFadeOut actionWithDuration:4.0f]; id actionTo0 = [CCSequence actionWithDuration:2.0f]; if (m < enemyNumber) id actionTo1 = [CCCallFunc actionWithTarget:self selector:@selector(goToNextScene)]; else id actionTo1 = [CCCallFunc actionWithTarget:self selector:@selector(goToEndScene)]; id actionSeq = [CCSequence actions:actionTo, actionTo0, actionTo1, nil]; [targetE runAction: [CCSequence actions:actionSeq, nil]]; error: expected expression before 'id' I am getting the above error. Should not we use (id) in if condition ? I want to get called two selectors by using the if- else condition. How can I make it ? Thank You.

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  • How to create a timer the right way?

    - by mystify
    I always have an class which needs to set up a timer for as long as the object is alive. Typically an UIView which does some animation. Now the problem: If I strongly reference the NSTimer I create and invalidate and release the timer in -dealloc, the timer is never invalidated or released because -dealloc is never called, since the run loop maintains a strong reference to the target. So what can I do? If I cant hold a strong ref to the timer object, this is also bad because maybe I need a ref to it to be able to stop it. And a weak ref on a object is not good, because maybe i'm gonna access it when it's gone. So better have a retain on what I want to keep around. How are you guys solving this? must the superview create the timer? is that better? or should i really just make a weak ref on it and keep in mind that the run loop holds a strong ref on my timer for me, as long as it's not invalidated?

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  • How to find out the format of a float?

    - by cannyboy
    I'm working with someone else's code, and there is a float with some unusual qualities. If I output the float using: NSLog(@"theFloat: %f", record.theFloat); I get: theFloat: 0.000000 However, if I use: NSLog(@"(int)theFloat = %i", (int) record.theFloat); I get: (int)theFloat: 71411232 How do I discover the real format and value of theFloat? I know that it should contain a large number. Incidentally, the Record class which contains the float propertizes it in such a way: @property (assign) float* theFloat; There is also floatLength: @property (assign) int floatLength; And has this method, which seems to indicate that the float is of variable length (?): - (void) copyFloat:(float*)theF ofLength:(int)len { float *floatcopy = malloc(len*sizeof(float)); memcpy(floatcopy, theF, len*sizeof(float)); self.theFloat = floatcopy; }

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  • Processing a method after the view has loaded..

    - by Susanth
    Hi ! I have implemented a subview which is supposed to load immediately when I click a button in the parent view. After loading the subview(which is basically holding an activityindicator), the program is supposed to process a method(which gets data from a server, so takes time) in it. However, I am unable to do it. What happens now is, when I click the button on the parent view, it processes the method first and only after that does the subview load on screen. Why is this so? Is there any specific functions I could use to make my method load only after the view has loaded?

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  • touch multi UIViews

    - by user262325
    Hello everyone There are a series UIViews arranaged very close. I hope when my finger touchs some of them, my app can detect which UIView touched. Maybe one or two or three.(because the displayed parts of each UIView are too thin). I hope to get the middle x value of the touch, then spread the UIView where the middle x value locates and the UIViews near it. Welcome any comment Thanks interdev

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  • Why this kind of release doesn't work?

    - by parkyprg
    Hello, I have a newbie question about the following: - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSArray *anArray; anArray = [dictionary objectForKey: [NSString stringWithFormat:@"%d", section]]; //here dictionary is of type NSDictionary, initialized in another place. AnObject *obj = [[AnObject alloc] init]; obj = [anArray objectAtIndex:0]; [anArray release]; return obj.title; } If I run it as it is I will get an error. If I don't put [anArray release] it works just fine. I don't quite understand why is this happening? Thanks.

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  • UITableViewCell get nil

    - by MTA
    I create a UITableView with custom UITableViewCell,this is how i create the cell in cellForRowAtIndexPath: static NSString *CellIdentifier = @"SongsCell"; SongsCell *cell = (SongsCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil){ UIViewController *vc = [[[UIViewController alloc] initWithNibName:@"SongsCell" bundle:nil] autorelease]; cell = (SongsCell *) vc.view; } now i want to get all cells in the table info (parameter from cell) when a button pressed: for (int i = 0; i < [songTable numberOfRowsInSection:0]; i++) { NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i inSection:0]; UITableViewCell *cell = [songTable cellForRowAtIndexPath:indexPath]; } Now i have a problem that this loop give me for cell a nil for all the cell that currently not seen in the table.

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  • Popping a modal view from anywhere in code

    - by ConfusedNoob
    Is it possible to 'pop' a view from any point in an iOS application. For example, I want an event to trigger a view sliding in (modal) and the event can happen at any time, on any screen in the application. Also, we'd like this to be something that can be included in other projects and would prefer them not to have to do anything special to these projects (other than wire in the referenced project).

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  • How can I reset my UI when the user presses a button?

    - by Fasttracks
    I have 1 scrollview that contain 18 buttons. 1) when a user taps on any button, a button is added to a second UIScrollView. 2) Then, when a user taps on that button on second scrollview the button is removed from second scrollview. both uiscrollviews contain a list of their buttons. Afree both of these steps, I have to reload my scrollview. Can I do the same task by adding observer, so that it will automatically reload when any action done on button, and if yes then how?

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