nsstring

I have to access a web server using a GET with international characters (Hebrew in my case but could be anything). So I make an NSString just fine but [NSURL URLWithString:urlString]; // returns nil. I realize I probably have to convert the international characters to percent codes. Is there a built in method in Objective-c to do so? Yes there is, you need -stringByAddingPercentEscapesUsingEncoding: method: [NSURL URLWithString:[string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; This would ensure NSURL *url does not return nil because of the "|" in the urlString .

What are these called in Objective C? @"%@" @"%d" @"%i" They are called format specifiers, could also be called 'placeholders in a string for the variables that will follow'. https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html They are NSString literal s. More specifically, they look they are being used as formatting strings for printf style functions. I believe that they are called 'format placeholders', as suggested by this wikipedia article: http://en.wikipedia.org/wiki/Printf_format_string#Format_placeholders 来源： https:/

I am trying to pull an JSON file from the backend containing unicodes for emoji. These are not the legacy unicodes (example: \ue415), but rather unicodes that work cross platform (example: \U0001F604). Here is a sample piece of the json getting pulled: [ { "unicode": "U0001F601", "meaning": "Argh!" }, { "unicode": "U0001F602", "meaning": "Laughing so hard" } ] I am having difficulty converting these strings into unicodes that will display as emoji within the app. Any help is greatly appreciated! In order to convert these unicode characters into NSString you will need to get bytes of those

I'm using this code snippet to encode characters to be friendly with a POST request: NSString *unescaped = [textField text]; NSString *escapedString = (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes( NULL, (__bridge_retained CFStringRef)unescaped, NULL, (CFStringRef)@"!*'();:@&=+$,/?%#[]", kCFStringEncodingUTF8); Which works great, but does not add escape Quotation marks: " How do I escape Quotation marks in IOS? I think I didn't word the question correctly. I needed to take the user inputted NSString from [textField text] and make sure that if there are quotation marks

I'm trying to re-arrange words into alphabetical order. For example, tomato would become amoott, or stack would become ackst. I've found some methods to do this in C with char arrays, but I'm having issues getting that to work within the confines of the NSString object. Is there an easier way to do it within the NSString object itself? sunkehappy I think separate the string to an array of string(each string in the array contains only one char from the original string). Then sort the array will be OK. This is not efficient but is enough when the string is not very long. I've tested the code.

What is the difference between: NSString *string1 = @"This is string 1."; and NSString *string2 = [[NSString alloc]initWithString:@"This is string 2.]; Why am I not allocating and initializing the first string, yet it still works? I thought I was supposed to allocate NSString since it is an object? In Cocoa Touch, -(IBAction) clicked: (id)sender{ NSString *titleOfButton = [sender titleForState:UIControlStateNormal]; NSString *newLabelText = [[NSString alloc]initWithFormat:@"%@", titleOfButton]; labelsText.text=newLabelText; [newLabelText release]; } Why do I not allocate and initialize for the

I have two NSStrings: orgText and searchLetter . I want to highlight every occurrences of the searchLetter in the orgText with a red color. How can I get the NSRange of all occurrences of the searchLetter ? for eg : suppose: orgText = "abcahaiapaoiuiapplma" searchLetter = "a". I want to hightlight all "a" occurrences in "abcahaiapaoiuiapplma" with red color. Thanks. I wrote this method for my project - SUITextView with highlight : - (NSMutableAttributedString*) setColor:(UIColor*)color word:(NSString*)word inText:(NSMutableAttributedString*)mutableAttributedString { NSUInteger count = 0,