nsstring

问题 NSString* str = @"1二3四5"; NSLog(@"%c",[str characterAtIndex:0]); NSLog(@"%c",[str characterAtIndex:1]); NSString - characterAtIndex works well on ASCII chars, but how could I get the UTF8 character at the index of 2? -- updated -- It seems unichar(16bits) can't represent all the UTF8 encoding strings(8bites to 32bites), so are there any method to get the char from NSString? 回答1: Unfortunately Dave's answer doesn't actually do what you want. The index supplied to

问题 NSString* str = @"1二3四5"; NSLog(@"%c",[str characterAtIndex:0]); NSLog(@"%c",[str characterAtIndex:1]); NSString - characterAtIndex works well on ASCII chars, but how could I get the UTF8 character at the index of 2? -- updated -- It seems unichar(16bits) can't represent all the UTF8 encoding strings(8bites to 32bites), so are there any method to get the char from NSString? 回答1: Unfortunately Dave's answer doesn't actually do what you want. The index supplied to

问题 This method is deprecated in iOS 7.0: drawAtPoint:forWidth:withFont:fontSize:lineBreakMode:baselineAdjustment: Now use drawInRect:withAttributes: instead. I can't find the attributeName of fontSize and baselineAdjustment. Edit Thanks @Puneet answer. Actually, I mean if there doesn't have these key, how to implement this method in iOS 7? Like below method: + (CGSize)drawWithString:(NSString *)string atPoint:(CGPoint)point forWidth:(CGFloat)width withFont:(UIFont *)font fontSize:(CGFloat

问题 I want to get a character from somewhere inside an NSString. I want the result to be an NSString. This is the code I use to get a single character at index it: [[s substringToIndex:i] substringToIndex:1] Is there a better way to do it? 回答1: This will also retrieve a character at index i as an NSString, and you're only using an NSRange struct rather than an extra NSString. NSString * newString = [s substringWithRange:NSMakeRange(i, 1)]; 回答2: If you just want to get one character from an a

问题 I have a UILabel whose property text I would like to set paragraphs of text to using NSString . I have an array in which I store a sequence of characters that represent a text paragraph. The paragraph doesn't have to fit/included perfectly within this UILabel . If the paragraph doesn't end, I would move on to the next label. Let say if I had rect size of this UILabel 160 X 240, how could I be able to determine the correct font size in order to fill this string of the UILabel within nicely? Is

问题 Hey guys, I'm new at this stuff, but I'm trying to use gethostname() to work using xcode and the ipad. I've tried a couple of things, but they all seem to freeze up. So when I just do: host = gethostbyname("website.com"); that works fine. I'd like to be able to change the website from within the program though. I've tried: const char *server = [Website_NSString UTF8String]; host = gethostbyname(server); const char *server = [Website_NSString cStringUsingEncoding:NSASCIIStringEncoding]; host =

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Understanding NSString comparison in Objective-C Was just reading up about equality vs identity and I realized that I've been using some equal signs when comparing strings in my objc code. The weird thing is that it actually works from times to times and I was wondering why. http://www.karlkraft.com/index.php/2008/01/07/equality-vs-identity/ I have two pieces of code, one work and one doesn't. WORKING. Here I

问题 I have app in which i have method which inserts comma in NSString in thousands values i also want to include decimall like if i enter now 1000 then it shows 1,000 using this method but i want 1,000.00 like this here is my method any idea how to fix this issue. - (NSString *)formatStringF:(NSString *)string { // Strip out the commas that may already be here: NSString *newString = [string stringByReplacingOccurrencesOfString:@"," withString:@""]; if ([newString length] == 0) { return nil; } //

问题 For the following code, I can read all the data in the string, and successfully get the data for plot. NSMutableArray *contentArray = [NSMutableArray array]; NSString *filePath = @"995,995,995,995,995,995,995,995,1000,997,995,994,992,993,992,989,988,987,990,993,989"; NSArray *myText = [filePath componentsSeparatedByString:@","]; NSInteger idx; for (idx = 0; idx < myText.count; idx++) { NSString *data =[myText objectAtIndex:idx]; NSLog(@"%@", data); id x = [NSNumber numberWithFloat:0+idx*0

问题 I've parsed some JSON data using NSJSONSerialization from the Foundation framework - however, I'm getting a weird key for an NSDictionary group as follows "stop_times" = ( { "departure_time" = "5:48a"; "departure_timestamp" = 1355309284; "service_id" = 1; shape = "Scarborough RT To Kennedy Station"; } Any idea what the key "shape" might be? Is it a string? I didn't think so since it wasn't surrounded with double quotation marks. Thanks for your help in advance! 回答1: The description method of