nsdictionary

I am trying to save and retrieve XML data to a file. For this purpose I am using NSDictionary 's writeToFile: The question is, how to write and retrieve an attributed string to and from a file on disk using NSDictionary 's writeToFile: ? NSAttributedString is not a property list object , so writeToFile: won't work. It does, however, conform to NSCoding , so you can write it to an archive with your dictionary as the root object (assuming that all the other objects in the dictionary also conform). If you need something more portable than archived object consider using RTF representation of

I'm trying to build an app that shows the latest RSS feeds from http://news.yahoo.com/rss/ I'm able to parse the xml using NSXMLParserDelegate, I'm able to show the date and time along with the title for the particular feed, but I also want to display an image for every feed, I know how to parse the main elements but I dont know how to pass the attributes for a child element which has a url as its key... e.g. the above feed consists of the following: <item> <title>fooo</title> <description ahref="some link" image src="http://l1.yimg.com/bt/api/res/1.2/Wo3_apH.kz7DMvOj7MDtRQ--

I have a query string: a=1&b=2&c[1]=3&c[2]=4 etc… I want a NSDictionary where a => 1 , b => 2, c => [3,4] . Notice that that the value for c is an array. It should also be able to handle something like c[1][2]=5 to make an array of arrays c => [[5]] . Of course I can do it myself by splitting on the & and = , but what about other cases such as arrays and arrays of arrays. I want a structured NSDictionary from a POST request queryString and do not want to rewrite the wheel if this already exists. Are there any class/method, through Apple or 3rd party, that will parse a query string into a

Normally blocks can be of 3 types: NSGlobalBlock, NSStackBlock, NSMallocBlock. Lets take the following example: void (^aBlock)(NSString *someString) = ^(NSString *someString){ NSLog(@"Block was executed. %@", someString); }; NSDictionary *dictionary = [NSDictionary dictionaryWithObject:aBlock forKey:@"aBlock"]; Because aBlock doesn't capture surrounding scope if I do po dictionary I get aBlock = < NSGlobalBlock :0x165dde60> and this is correct If I then do a: NSString *string = @"Test"; void (^aBlock)(NSString *someString) = ^(NSString *someString){ NSLog(@"Block was executed. %@ %@",

I've been trying to sort an NSArray of NSDictionaries using a comparator, but I cannot seem to get the output I desire. The output I'm trying to achieve is that A-Z usernames should come first in the sorted array, then usernames that start with a digit should come second in the sorted array, and lastly usernames that start with an underscore should be last in the sorted array. Any help is truly appreciated! EDIT: It should be sorted so it looks consistent through the whole NSArray so that: _Anna comes before _Bob and _11Bob comes before _12Cary but after _09Bob Example of desired output I'm