Search Results

Search found 34 results on 2 pages for 'dugla'.

Page 2/2 | < Previous Page | 1 2 

• Cocoa & Cocoa Touch. How do I create an NSData object from a plain ole pointer?

  - by dugla

  I have malloc'd a whole mess of data in an NSOperation instance. I have a pointer: data = malloc(humungous_amounts_of_god_knows_what); uint8_t* data; How do I package this up as an NSData instance and return it to the main thread? I am assuming that after conversion to an NSData instance I can simply call: free(data); Yes? Also, back on the main thread how do I retrieve the pointer? Thanks, Doug

  Read the article

• What are the semantics of [myThing.myProperty release]?

  - by dugla

  I clearly have not fully grocked properties. I have an instance of a class, myThing. myThing has a property that has be synthesized: // .h @property(nonatomic,retain)MyCoolType *coolType; // .m @synthesize coolType; In my program I call: // The retain count on MyCoolType is 1. [myThing.coolType release]; The reference count on MyCoolType is now zero and dealloc should fire. So, shouldn't myThing.coolType now be nil? In my code that is not the case. How do a correctly release and force the property to return nil? Thanks, Doug

  Read the article

• iPhone/iPad. How do I launch an app from link in Safari?

  - by dugla

  I have an app that I want to be launchable either explicitly when tapped or when a parameterized URL is clicked on on a webpage in Safari running on iPad or iPhone. Can someone sketch the approach for me and/or point me to the relevant docs? Thanks so much. Cheers, Doug

  Read the article

• Does tableViewController behave incorrectly when hosted by a popoverController?

  - by dugla

  I have made countless test examples of a tableViewController hosted by a popoverController and I have come to the following conclusion: It does not appear possible to pre-select a tableView cell. It is possible to do pre-selection when a tableViewController is hosted by a splitviewController. I am using the exact same tableViewController code. Here is the relevant tableViewController view lifecycle method that is misbehaving: static BOOL firstTime = YES; - (void)viewDidAppear:(BOOL)animated { NSLog(@"Root ViewController - view Did Appear"); [super viewDidAppear:animated]; if (firstTime == YES) { firstTime = NO; NSIndexPath *preselectedCell = [NSIndexPath indexPathForRow:5 inSection:0]; [self.tableView selectRowAtIndexPath:preselectedCell animated:NO scrollPosition:UITableViewScrollPositionTop]; detailViewController.detailItem = [NSString stringWithFormat:@"Row %d", preselectedCell.row]; } // if (firstTime == YES) } The above code correctly preselects a tableView cell the first time the tableView is unfurled in the splitViewController case (device in portrait mode). Can someone please, please, explain what I am doing wrong. I am completely stumped. Thanks, Doug

  Read the article

• iOS Question. Is There a Framework for Build Time Based Apps.

  - by dugla

  I have the need for some time based effects in the iPad app I am building. The UIView class animation capability beginAnimatins/commitAnimations is exactly the sort of thing I am looking for but it is restricted to specific properties of UIView deemed animatable. Ideally, I am looking for a solution that lets me drive an a time-based function that can perhaps send messages to a class of my own choosing at the rate I specify in the animation. Specifically, I have a function - my implementation of the RenderMan function "smoothstep" which is essentially an ease-in ease-out curve common in animation. It takes [0 - 1] as input and outputs [0 - 1] as the curve is evaluated. I want to drive this function for a duration of my own choosing at rate of my own choosing. Thanks in advance. -Doug

  Read the article

• Cocoa Question: How do I get a string representation of a SEL?

  - by dugla

  Is it possible, given a SEL to generate a string representation of the method it refers to? For context: I have an object instance initialized thusly: -(id) initWithTarget:(id)object action: (SEL)action; Within the instance I would like to echo the string name of the method referred to by SEL. How do I do that?

  Read the article

• iPhone OS Memory Warnings. What Do The Different Levels Mean?

  - by dugla

  Regarding the black art of managing memory on iPhone OS devices: what do the different levels of memory warning mean. Level 1? Level 2? Does the dial go to 11? Context: After an extensive memory stress testing period - including running my iPad app with the iPod music player app playing, I am inclined to ignore the random yet infrequent memory warnings I am receiving. My app never crashes. Ever. My app is leak free. And, well, the mems warnings just don't seem to matter. Thanks, Doug

  Read the article

• Xcode Instruments. What is the meaing of Virtual Memory? iPhone OS has no VM?

  - by dugla

  Hello, I've been staring at the Memory Monitor in Instruments and I am scratching my had. Why is it displaying virtual memory? iPhone OS has no virtual memory. What does it mean? My concern is that I am getting memory warnings for my iPad app but the apps real memory never exceeds 70MB and the virtual memory never exceeds 180MB? Could someone please enlighten me? Cheers, Doug

  Read the article

• iPhone. Is it possible to load a video file and select a specific frame?

  - by dugla

  Is it possible to load a short video file and - once loaded - select a specific frame and display that frame in a view? If there is no native support for this, how about an open source alternative? Thanks in advance. -Doug

  Read the article

< Previous Page | 1 2