nsstring

问题 I'm trying to load a file into a string. Here is the code I'm using: NSError *error = nil; NSString *fullPath = [[NSBundle mainBundle] pathForResource:filename ofType:@"html"]; NSString *text = [NSString stringWithContentsOfFile:fullPath encoding:NSUTF8StringEncoding error:&error]; When passed in @"about" as the filename, it works absolutely fine, showing the code works. When passed in @"eula" as the filename, it fails with 'Cocoa error 258', which translates to NSFileReadInvalidFileNameError

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I am new to iOS programming and i am trying to get a textual representation of an NSData object as a NSString For example if the NSData object is: <07010013 01020000 09000100 000199c2> I want to convert that to: "070100130102000009000100000199c2" How can I do that? 回答1: HINT#1 // general answer NSString provides

问题 I have a strange issue with Xcode6.1 _mainURl is my ' ServerLink ' service is ' GetUserById ' NSString* str = [NSString stringWithFormat:@"%@%@",_mainURl,service]; NSURL *url = [NSURL URLWithString:str]; When I append two strings and Create a url with NSURL , url getting 'null' But, When I directly given the server link followed by serviceName I can generate URL. NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"ServerLink/GetUserById"]]; 回答1: Based on what you have written, the

问题 I have 5 buttons. Each button has some value like 1,2,3,4,5 in a string named totalSeats_selected . I want to save them into a nsstring that shows result like this: nsstring * result = [1,2,3,4,5]; These values are to used as request for a web service, so it must be in this format to send total number of seats? So, how to save all these values in nsstring on button event? 回答1: Use like this.Suppose your string is in integer means use Method 1 .otherwise use Method 2(If your value assigned in

问题 I am in confusing in iOS 13 with keychain access. CFDataRef passwordData = NULL; OSStatus keychainError = noErr; keychainError = SecItemCopyMatching((__bridge CFDictionaryRef)returnDictionary, (void *)&passwordData); NSString *password = [[NSString alloc] initWithBytes:[(__bridge_transfer NSData *)passwordData bytes] length:[(__bridge NSData *)passwordData length] encoding:NSUTF8StringEncoding]; after execute above code segment, password variable value is {length=32,bytes

问题 xcode 4.6 (4H127), xcode 4.6.3 (4H1503): A simple lower/uppercase conversion of a string with an accented char crashes, depending on the setting of Deployment Target. Code snippet: NSString *lc1 = @"Bosnië-Herzegovina"; NSString *lc2 = [lc1 lowercaseString]; NSString *uc3 = [lc1 uppercaseString]; NSLog( @"\nlc1=%@\nlc2=%@\nuc3=%@ ", lc1,lc2,uc3); The "ë" is simply typed as "opt-u e", the source code file is regular UTF Unicode. lc1 looks as expected in the debugger. But, lc2 and uc3 strings

问题 I am trying to convert (or copy?) a NSString into a NSMutableArray. I guess my problem is that I don't really understand the structure of a MutableArray. In my limited knowledge, an Array could look like this: NoteBook = [[NSMutableArray alloc] init]; for (int temp = 0; temp < 3; temp++) { [NoteBook insertObject:@"Page" atIndex:temp]; } Which would give me an Array of PagePagePage . Let's assume I wanted to open a txt file which contains PagePagePage, but the words were separated by a defined

问题 I have a UILabel with the following text: Medium, Black What I intended to do was grab the words in the string and insert each into a mutable array so I could use each title later on to identify something. Here's how I done this: NSMutableArray *chosenOptions = [[[[cell tapToEditLabel] text] componentsSeparatedByString: @" "] mutableCopy]; NSString *size = [chosenOptions objectAtIndex:0]; NSString *colour = [chosenOptions objectAtIndex:1]; I've logged these two NSString and size is returning

问题 I am trying to make a utility method for FMDB which will take an NSArray of values and return a string of placeholders for use in an IN statement based on the number of values in the array. I can't think of an elegant way of creating this string, am I missing some NSString utility method: // The contents of the input aren't important. NSArray *input = @[@(55), @(33), @(12)]; // Seems clumsy way to do things: NSInteger size = [input count]; NSMutableArray *placeholderArray = [[NSMutableArray

问题 So I am trying to retrieve data from an XML stream coming from a URL. This URL is configured on a search string the user inputs. Is there any reason why this code should not be working? NSString *searchString = "Geoff"; NSString *updatedURL = [NSString stringWithFormat:@"http://mysearchpage.com/searchQuery=%@", searchString]; NSLog(updatedURL); NSURL *url = [[NSURL alloc] initWithString:updatedURL]; Now this works fine for single word searches, but as soon as I try and search for like a first