ios4

问题 I'm trying to recreate UIViewAnimationTransitionFlipFromRight (and left). My reason for doing so, as shown below, is to make changes to AVCaptureVideoPreviewLayer in the middle of the animation, when the layer is obstructed. UIViewAnimationTransitionFlipFromRight won't let me stop the animation half way, make session changes, and continue, so here is my best shot at it. While this works, it's just not the same as UIViewAnimationTransitionFlipFromRight. The layer starts to rotate, but more of

问题 I'm trying to get the free space on the device and the amount of space my sandbox is using. Any thoughts? Thanks, Rick 回答1: In Objective-C you can get the available file system space with NSFileManager : NSFileManager* filemgr = [NSFileManager defaultManager]; NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *docDirectory = [paths objectAtIndex:0]; NSDictionary* fsAttr = [filemgr attributesOfFileSystemForPath:docDirectory error:NULL];

问题 How can I use/implement the new Graph API from facebook in iOS programming (objective C)? Also parsing the JSON file returned by the API? I can't seem to find any examples out there. Facebook resources doesn't give too many details on iOS development. 回答1: Have you downloaded the Facebook iOS SDK from here: http://github.com/facebook/facebook-ios-sdk. It contains all you need to connect to Facebook from iOS and also sample code on how to use both the old API and the new Graph API. 回答2: Just

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: display image from URL retrieved from ALAsset in iPhone In my Application I need to get specific image from Photo Library, with use of didFinishPickingMediaWithInfo i am able to get the Imagename and ImagePath. I am storing Imagename, ImagePath in Database. But, how to show that specific image with use of the Imagename or ImagePath in Imageview from Photo Library? 回答1: Please make use of ALAssetLibrary . To do

问题 I want to update my TableView from the deprecated initWithFrame:reuseIdentifier: . My tableview uses custom cells. Everywhere it says to use initWithStyle: , and that it does not change behavior or the cell in any way from initWithFrame:CGRectZero reuseIdentifier: . But when I am building with initWithStyle:UITableViewCellStyleDefault reuseIdentifier: the cells become blank (i.e. our custom cell does not work (because it is initialized with some style?)). After the cell has been initialized

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 8 years ago . I have searched around for making a sample on creating my custom keyboard but nothing seemed to help. So Please provide me a code sample to create my custom keyboard please help me out 回答1: YourKeyboard.h :

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 8 years ago . I have searched around for making a sample on creating my custom keyboard but nothing seemed to help. So Please provide me a code sample to create my custom keyboard please help me out 回答1: YourKeyboard.h :

问题 i have been using the block support extensively in ASIHttpRequest, and i have found it to be an extremely elegant way of coding async requests, much more so than having the delegate call back a seperate function Here is the example code for quick reference. __block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setCompletionBlock:^{ NSString *responseString = [request responseString]; }]; [request startAsynchronous]; I would like to start using Restkit, but I need to

问题 i have been using the block support extensively in ASIHttpRequest, and i have found it to be an extremely elegant way of coding async requests, much more so than having the delegate call back a seperate function Here is the example code for quick reference. __block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setCompletionBlock:^{ NSString *responseString = [request responseString]; }]; [request startAsynchronous]; I would like to start using Restkit, but I need to

问题 I have changed my core data model quite extensively. There are loads of question how to migrate the old data into the new model, however i don't need to migrate anything. I just would like to replace the current Core Data instance. How can this be done? 回答1: I'm going to assume you're using a persistant store coordinator with NSSQLiteStoreType . Just change the name of the url for your persistant store coordinator. If the previous version used a url called MyApp.sqlite , change it to