nsdata
NSData writeToFile not working
I cant seem to get nsdata to write to a file. Any ideas what i may be doing wrong. Thanks in advance.[详细]
2023-04-01 01:52 分类:问答Convert nsdictionary to nsdata
have an app that can take 开发者_开发百科a picture and then upload to a server. encoding it to base 64 and pass it thru a XMLRPC to my php server.[详细]
2023-03-31 16:29 分类:问答Does NSFileHandle -readDataOfLength: return autoreleased NSData?
When I call readDataOfLength: on an NSFileHandle开发者_高级运维 instance, do I need to release the returned NSData? Currently I\'m not, but I would like to get rid of this nagging doubt.Nope. Cocoa\'s[详细]
2023-03-31 06:54 分类:问答How to convert UIImage to byte array or base64encoding?
I have an image which i want to send as byte array to a server .I want to know how to convert uiimage to byte array ?开发者_开发百科 I have to send parameter as[详细]
2023-03-30 20:34 分类:问答What format is person's ImageData(CFDataRef) in AddressBook?(Jpeg or PNG)?Or how to determine?
From AddressBook\'s API ABPersonCopyImageData I can get a CFDateRef which is toll-free bridge to NSData. And I want to write this data开发者_StackOverflow社区 to file, but what file extension should I[详细]
2023-03-30 17:12 分类:问答Sending hexadecimal data to devices (Converting NSString to hexadecimal data)
I\'m trying to send hexadecim开发者_如何转开发al data via WiFi. The code is something like this:[详细]
2023-03-30 07:41 分类:问答Write data to file Cocoa?
I need t开发者_运维知识库o use thewriteToFile: methods in writing data (that is encrypted) to a file. However, say I have:[详细]
2023-03-30 03:16 分类:问答iPhone, NSURLConnection > didReceiveData:(NSData *)data, How to check result data
I use url connection (http). - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {[详细]
2023-03-29 20:02 分类:问答UIImageJPEGRepresentation giving EXC_BAD_ACCESS
In my app I am using the camera and photo library to get an UIImage, this UIImage is then scaled down about 20 times its normal size[详细]
2023-03-29 19:29 分类:问答Access information from Byte Array using its index
I am usinga byte array to开发者_StackOverflow社区 store Nsdata of(4840 bytes) and nnow i have to access the data at index of byte array.here is my code .[详细]
2023-03-29 03:01 分类:问答