nsstring

问题 I am being provided a string that may have a unicode apostrophe in it (\u2019) and I must replace it with a standard apostrophe (plain old "'"). I usually use stringByReplacingOccurrencesOfString to do this kind of thing but trying this does not work: sMyString = [sMyString stringByReplacingOccurrencesOfString:@"\\u2019" withString:@"'"]; Makes sense that it didn't work I guess since the actual values representing the apostrophe internally in the NSString will be numeric. Anyone know how to

问题 Due to some protocol specifications for Quartz Composer, the string "\0\0\0" has to precede every character sent via UDP. The current value has this format: "1.23456". For the transfer the last three decimal places are not required, but the addition before every number, so it should look like this: "\0\0\01\0\0\0.\0\0\02\0\0\03". What's "the Objective-C way" to solve this? 回答1: If I understood you correctly, you want to send a sequence of characters (type char ). In that case, NSString

问题 How do I convert an NSString value to NSData ? 回答1: NSString* str = @"teststring"; NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding]; 回答2: NSString *str = @"helowrld"; // This converts the string to an NSData object NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding]; you can take reference from this link 回答3: Do: NSData *data = [yourString dataUsingEncoding:NSUTF8StringEncoding]; then feel free to proceed with NSJSONSerialization:JSONObjectWithData . Correction to the

问题 I have an NSString which is a mathematical expression. I have operators (+,-,*,/) and operands (digits from 0 to 9,integers,decimals etc) . I want to convert this NSString into NSArray . For example if my NSString is "7.9999-1.234*-9.21". I want NSArray having elements 7.9999,-,1.234,*,-,9.21 in the same order. How can I accomplish this? I have tried a code. It dosent work in all scenarios though. Here It is: code: NSString *str=@"7.9999-1.234*-9.21"; NSMutableArray *marray=[[NSMutableArray

问题 I'm trying to send an array in post JSONModel call. I need convett my array to NSString and send the array in format: [1, 2, 3] but when I convert this to NSString and print my array, this has the format: (1, 2, 3) NSMutableArray *array= [NSMutableArray arrayWithObjects:@"1", @"2",@"3",@"4", nil]; NSString *arraString = [NSString stringWithFormat:@"%@", arr]; NSLog(@"%@",arraString); How can I create this with [] format? 回答1: NSMutableArray *array= [NSMutableArray arrayWithObjects:@"1", @"2",

问题 So I successfully retrieved my BLOB image from the database and set it to NSData *content.. content = [[NSData alloc] initWithBytes:sqlite3_column_blob(query, 16) length:sqlite3_column_bytes(query, 16)]; What I am trying to do is to get this content into a NSString, because I would like to then pass this string to javascript and display the image. I am not exactly sure if this is even possible, but i have read on the link below that you can display images in css/html in base64. http://mark

问题 I'm trying to send a string via ftp using the code below but I'm getting an error: { //miscellaneous lines of code..... //Convert contents of shopping cart into a property list [Cart serializeCart]; //now need to transport the propertyList to the webserver //first step is get the serialized propertylist from the documents folder NSString *pathToSerializedCart = [rootPath stringByAppendingPathComponent:@"serializedCart.plist"]; NSString *shoppingCartString; if (![fileManager fileExistsAtPath

问题 I have UIWebView for reading content. After that i select some text from content stores in string using NSUserDefaults in Viewcontroller. Then i retrieve this string value and displays in UITextView to viewcontroller1. But the UITextView is not updating text from viewcontroller. The NSUserDefaults also not getting updating text. Im using [self.navigationController pushViewController:viewcontroller1 animated:YES]; for switch to viewcontroller1. viewcontroller: [wbCont loadHTMLString:webString

问题 I have UIWebView for reading content. After that i select some text from content stores in string using NSUserDefaults in Viewcontroller. Then i retrieve this string value and displays in UITextView to viewcontroller1. But the UITextView is not updating text from viewcontroller. The NSUserDefaults also not getting updating text. Im using [self.navigationController pushViewController:viewcontroller1 animated:YES]; for switch to viewcontroller1. viewcontroller: [wbCont loadHTMLString:webString

问题 I have a NSdata object that is populated with a bunch of information thats formated in hex.. I am trying to convert it into its proper string representation but am struggling to have any success. One thing I have tried is to simply put it into a NSString and then NSLog it with a special character identifier thingy.. forgot the word (%02x), However to do this I am encoding it to NSUTF16.. which i dont want to do.. I mearly want to see exactly whats the data I am getting looks like as a