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  • Optional Navigation Controller

    - by Kevin Sylvestre
    I have an application containing a variety of view controllers linked together in different ways (Welcome Browse Preview OR Browse Preview OR Settings Splash). The first view controller is presented modally using a navigation controller from a main controller, then the next set of view controllers are added using pop and push. This works correctly, but I need to be able to define my 'UINavigationBar' and 'UIToolbar' within interface builder, so they still work as expected if they are presented without using a navigation controller. Is this possible? Currently I get this if I try:

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  • Graph generation on iPhone

    - by Parrots
    Anyone have experience with drawing graphs on the iPhone? Looks like GraphKit isn't an option, so it's up to the programmer to either write his own library (using OpenGL, I guess), or an existing library. I can't seem to find any libraries that are confirmed to work on the iPhone. If you've written your own how did you go about it (opengl, quartz, etc), or if you used a library which one?

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  • Webview blank but content is there

    - by Scott Dugas
    I am having trouble displaying a webview. I have a webview inside a custom view. I load this custom view as a subview of the window, and then have an object controller linking a text field to the content of the web view. Once a page is loaded, it loads all the content, but it is visually white. You can click on links. If you go to a Youtube video you can listen to it, but it still displays nothing.

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  • Clearing NSUserDefaults

    - by TonyNeallon
    I'm using +[NSUserDefaults standardUserDefaults] to store application settings. This consists of roughly a dozen string values. Is it possible to delete these values permanently instead of just setting them to a default value?

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  • IBOutlets are always nil

    - by Jonas
    Hi, In IB I have subclassed the File Owner and the subclass loads my .nib. The subclass itself doesn't need access to the IBOutlets so they're instance variables in another class, which I added as a subclass of NSObject in the .nib. Then I connected the interface elements to that object. But somehow, in the class that "owns" the IBOutlets, they show up as nil. What am I doing wrong here?

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  • Drawing lines between windows just like in Interface Builder

    - by Koning Baard
    I have two windows, each with a round NSView: ------------------ ------------ |X-+ Oscillator | |X-+ Mixer | |----------------| |----------| | | | | | O | | O | | | | | | | | | ------------------ ------------ Both windows are in a seperate NIB. I want to be able to draw a line between the two round NSViews at runtime, using drag'n'drop, just like connecting IBOutlets in Interface Builder: ------------------ ------------ |X-+ Oscillator | |X-+ Mixer | |----------------| |----------| | | | | | O-------+-----+-----O | | | | | | | | | ------------------ ------------ I also want to be able to determine to which NSViews the NSViews are connected using the drawn lines. I need this to connect Oscillators to Mixers. I also want to be able to remove the connections by dragging into empty space. Can anyone explain me how to do this? Thanks.

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  • iPhone: Going from transformed layers to jpeg

    - by Devin Ross
    I have a bunch of images that are transformed (using touch gestures). I want to take the transformations the user does to the images and create a jpeg from it. (ie. if a user rotates a photo to the right, I want to get a jpeg of the photo rotate to the right just as the looks on screen). This takes into account that the photo could be bigger than whats displayed on screen too (no screenshots). I'm trying to use CGContext (CGContextRotateCTM specifically) but its not been too successful. Thanks for the help.

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  • Object in NSMutableArray crushed in memory

    - by Yoot
    Hi, I have some big problem with an NSMutableArray I'm filling with objects in a database. I'm using [appDelegate.myArray addObject:myObject], then somehow the object gets crushed in the memory, I don't know why, I didn't release anything... Thanks for your answers (and sorry for my poor english xD)

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  • Upload Image to Facebook Objective-C

    - by boopyman
    I'm currently trying to upload an image from my Mac application to Facebook. To do this, I'd like for the user to simply input his username and password, and to click a button. The only issue is, Facebook doesn't actually have an API for the Mac, it only has one for iOS. This shouldn't be a problem, except for the fact that to login, you must use a web view, something I'm not to keen on doing, since I'd like the interface to be two simple text fields. I've also looked into PHFacebook, a class I found online, but it also seems to utilize an NSWebView. I'm wondering if there's a security issue when you use text fields; indeed, it's slightly strange no available API offers this function ! So, to conclude, is it possible, or is there an API, that lets you upload an image and lets you provide the user's credentials through simple NSStrings?

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  • Difference between two UIScrollView delegates

    - by Michael
    scrollViewDidEndScrollingAnimation and scrollViewDidEndDecelerating Looks like the last one is called when the bouncing effect is finished. But can't really understand what's the difference between first because they are called same time(well, decelerating called first).

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  • OBJ-C - Getting a class name from a class hierarchy

    - by mmmilo
    Let's say I have the following headers: @interface SuperClass : NSObject @interface SubClass : SuperClass I'm alloc'ing an instance of the class by doing: SubClass *sc = [[SubClass alloc] init]; In my SuperClass.m: - (id) init { self = [super init]; if (self != nil) { NSString *cString = NSStringFromClass([self class]); } return self; } Simple, right? My question is: how can I get cString to return the SuperClass class, rather than the SubClass class? Since the SubClass is alloc'd/init'd, is this not possible? Thanks!

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  • UITableView - centering of Sections

    - by Raj
    Hi all, I am using a table view with its style set as "Grouped". I have only 2 sections to be displayed in the table view and the table view does not occupy full iPhone screen (It has some other views with it). So I would like to display those 2 sections centered in the table view rather than displaying the sections from the top of table view. One round about way is to set header and footer of the table view appropriately. But the disadvantage of this is, each sections will be equidistant (looks awkward!). Anybody with solutions to it? Thanks, Raj

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  • How can I duplicate, or copy a Core Data Managed Object?

    - by 106480833665852483906
    I have a managed object ("A") that contains various attributes and types of relationships, and its relationships also have their own attributes & relationships. What I would like to do is to "copy" or "duplicate" the entire object graph rooted at object "A", and thus creating a new object "B" that is very similar to "A". To be more specific, none of the relationships contained by "B" (or its children) should point to objects related to "A". There should be an entirely new object graph with similar relationships intact, and all objects having the same attributes, but of course different id's. There is the obvious manual way to do this, but I was hoping to learn of a simpler means of doing so which was not totally apparent from the Core Data documentation. TIA!

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  • Improving the efficiency of multiple concurrent Core Animation animations

    - by Alex
    I have a view in my app that is very similar to the month view in the built-in Calendar app. There's a subview that holds the individual cells (a custom UIView subclass that draws text into its layer), and when the user navigates to the next "month", I create the new cells and slide the view to show them. When the animation stops, I remove the old, hidden cells and set things up so it's ready to go for the next animation. This all works nicely. However, I'd like to animate the cells' text color, as in the Calendar app, so that the outgoing ones transition to a lighter color and the incoming ones transition to a darker color. The problems is that I can have as many as 70 cells, so doing individual animations is very slow -- between 5-10 fps on my iPhone 3GS. I'm trying to find a less computationally intense way of doing this. My reading of the Shark results is that the majority of the time is spent redrawing the text for each frame for each frame. This makes sense, since text rendering is hardly the cheapest operation. I've considered creating a second view -- one holding the "outgoing" state and one holding the "incoming" state and using a single opacity animation to gradually reveal the updated cells while both are sliding. I'm concerned that instead of having 70 cells, I'll have 140, which seems like a lot of views. So, is that too many views or would there be a better way of doing this?

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  • UITableViewCell: Allowing Selective Deletion

    - by Aran Mulholland
    I have a table view and want to allow rearranging of all cells, however there are certain cells that i do not want to be allowed to be deleted. when the UiTableView is put into deletion mode i do not want the red '-' button to appear on the left hand side, and do not want the swipe gesture to bring up the Delete button of these cells but want it to happen for the others. Any ideas?

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  • Scroll immediately to row in table before view shows

    - by cannyboy
    A view with a table gets pushed onto the screen and I want it to scroll to a certain row in the table before the screen actually displays. I use this code within the final viewcontroller. NSIndexPath *scrollToPath = [NSIndexPath indexPathForRow:5 inSection:0]; [theTable scrollToRowAtIndexPath:scrollToPath atScrollPosition:UITableViewScrollPositionTop animated:NO]; When I put it in viewDiDAppear method, then it briefly flashes from the intial position of the table (at the top) to the row I want. I don't want it to show the initial position. If I put it in viewDidLoad or viewWillAppear then it crashes with a NSRangeException, presumably because the table isn't set up yet. How would I get it to scroll without showing the initial position?

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  • How can I make a view get bigger again, as soon as the status bar goes back to normal height after a

    - by Thanks
    In the simulator I went to Hardware menu and activated the simulation of bigger status bar during phone call. Now, I tried to make a view in my nib that takes up the whole screen. As soon as the status bar gets smaller, I want my view to get bigger, so it uses that space up there. But regardless of any autoresizing settings, my view will keep pressed down after that status bar gets smaller. There is a empty slot left where the status bar was after hanging up the call. What's that actually supposed to be? Is my app recognizing the status bar as a view, or is the status bar indeed making my screen smaller? I mean...does it mess around with my views as if it was a view itself, or do my views not know about a status bar, but about a smaller screen size when the status bar gets bigger? How do you get your views big again when the status bar returns to normal height?

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