iphone-sdk-3.0

问题 Is it possible to use the bare minimum zlib available on iPhone to uncompress a zip of a folder. I don't want to go for a open source library, please enlighten me the difficulty or possibility of implementing one piece of code which can uncompress a zip file. 回答1: As JosephH said, you cannot use ZLib to deal with .zip files. But you can use the MiniZip library for that: http://www.winimage.com/zLibDll/minizip.html There's already an Objective-C wrapper, if you don't want to write yours: http:

问题 I am developing an application in which I want to use push notification service. I have a server, now I want to know that How do I handle multiple devices? Is there a unique device id/name for every iphone? Suppose I want to delete request for a specific device token, so how do I handle multiple users? Is there a way I can generate unique name for every device through application? 回答1: You should really read the APNS documentation, this is all explained in depth there. The short answer is

问题 I am using iFrameExtractor to extract the frames. But when I clone the project I found that few files from ffmpeg framework was missing. I tried hard to include the missing file, but was not able to do that.. Can anyone sort out this issue or give me the link of FrameExtractor class which contains all the lib files of FFMpeg . I downloaded the project from this link but when i open the project i gets the following missing file in the image.! This are the missing files 回答1: Well you could have

问题 I have a UITextView that I want to detect a single tap for. It looks like I would be fine with simply overriding touchesEnded:withEvent and checking [[touches anyObject] tapCount] == 1 , however this event doesn't even fire. If I override the 4 events like this: -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; NSLog(@"touchesBegan (tapCount:%d)", touch.tapCount); [super touchesBegan:touches withEvent:event]; } -(void)touchesMoved:(NSSet *

问题 Can't get "Location" header from response at all. Wireshark says that i've got one: Location: http://*/index.html#0;sid=865a84f0212a3a35d8e9d5f68398e535 But NSHTTPURLResponse *hr = (NSHTTPURLResponse*)response; NSDictionary *dict = [hr allHeaderFields]; NSLog(@"HEADERS : %@",[dict description]); Produces this: HEADERS : { Connection = "keep-alive"; "Content-Encoding" = gzip; "Content-Type" = "text/html"; Date = "Thu, 25 Mar 2010 08:12:08 GMT"; "Last-Modified" = "Sat, 29 Nov 2008 15:50:54 GMT"

问题 Why doesn't the prepareForDeletion: method get called? I'm deleting an object using its ancestor relationship: [folder removeDocumentObject: doc]; The "doc" object gets deleted like expected, but its prepareForDeletion method never gets called... =\ 回答1: Because it's not being deleted :) If [folder documentObject] returns nil that just means that there is no relationship between the two objects. It doesn't mean that the object is deleted from core data. Try this : [[doc managedObjectContext]

问题 Does anyone know if it is possible to access the iPad's camera connection kit? I would like to read the files off the connected mass storage device. Would this be possible or is this something that only Apple can do in their apps. Thanks 回答1: I know this is an old question, but google brought me here so I thought I'd add this link for the next person to come along. The good news is this. USB drives do mount properly and show up in the system as /dev/disk2s1. Yay. You can even add more drives

问题 I have a something like this: NSTimer* timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateCountdown) userInfo:nil repeats:YES]; I am updating a label's text using this timer. Not at a certain condition I want to check if timer is active then invalidate the timer. My question is how do I find that timer is active or not? 回答1: When a non repeating timer fires it marks itself as invalid so you can check whether it is still valid before cancelling it (and of

问题 I have 10,000 rows in database table. I have a view which is suppose to list all these rows in a tableview. But loading all in one shot takes ages to appear in tableview. How can we use "Load More Records" feature which will fetch 20 records at a time? If user wants to view more entries, they can click "Load More Records" button and it will show next 20 records. Will have to modify my select statement? What other changes do I have to do to achieve this? 回答1: UITableView reuses its cells. This

问题 I have 10,000 rows in database table. I have a view which is suppose to list all these rows in a tableview. But loading all in one shot takes ages to appear in tableview. How can we use "Load More Records" feature which will fetch 20 records at a time? If user wants to view more entries, they can click "Load More Records" button and it will show next 20 records. Will have to modify my select statement? What other changes do I have to do to achieve this? 回答1: UITableView reuses its cells. This