nsstring

问题 I'm currently learning about web services in Swift. I have this URL that shows recent earthquakes and other information regarding it. The code at the bottom is what I have so far, once I run it, it NSLogs a string in JSON format from the URL. Here are 3 records I have from the string. How do I parse this JSON string and take out the ID, title, and populate that information into a dictionary? html = [ { "response":1, "message":"OK", "count":50 }, { "id":133813, "title":"M 1.4 - 8km NE of

问题 Is it possible to replace a word with emoticons? For example NSString *myString = @"I am sad of him" now i want to check the word whether it contains the word "sad", if it has i want to replace that word with sad emoticons. I am not sure how to have emoticons in the nsstring Please let me know 回答1: yeah, you can do this using this: myString = [NSString stringByReplacingOccurrencesOfString:@"sad" withString:@"\ue058"]; Check this link for emoji codes: (replace the &#x with \u though) http:/

问题 I have been learning Objective-C for a while, and I decided to try and take on a little bigger project without any real "guidelines" as in the learning books but now I have got stuck. What I'm trying to do is helping a friend digitalising a few documents he have, by creating a searchable commandline-tool for these documents. I think I have gotten pretty far, I have created a custom class for documents with three variable; name of the author, number of the article and the path to the file on

问题 The "Stopping" statement never gets printed even if you type 'stop' when running the program. Is the initWithUTF8String: method introducing extra formatting? int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; char holderText[256]; fgets(holderText, 256, stdin); NSString *words = [[NSString alloc] initWithUTF8String:holderText]; if ([words isEqualToString:@"stop"]) { NSLog(@"STOPPING"); } NSLog(@"This is what you typed: %@", words); [pool

问题 There is a substring that occurs in a string several times. I use rangeOfString , but it seems that it can only find the first location. How can I find all the locations of the substring? NSString *subString1 = @"</content>"; NSString *subString2 = @"--\n"; NSRange range1 = [newresults rangeOfString:subString1]; NSRange range2 = [newresults rangeOfString:subString2]; int location1 = range1.location; int location2 = range2.location; NSLog(@"%i",location1); NSLog(@"%i",location2); 回答1: You can

问题 When THE score updates, a new score value label overwrites old one on the display, because of this score is just unreadable, how to update new score? here what i got: SKLabelNode *ScoreLabel; NSInteger score = 0; ----------------------------- -(void)Scoring{ score = score +1; ScoreLabel = [SKLabelNode labelNodeWithFontNamed:@"Arial"]; ScoreLabel.position = CGPointMake(CGRectGetMidX(self.frame), 960); ScoreLabel.text = [NSString stringWithFormat:@"%ld",(long)score]; [self addChild:ScoreLabel];

问题 i m trying to draw a string with CGContextShowTextAtPoint. CGContextShowTextAtPoint only accepts "const char" as a string input. my problem is that some of the strings have special chars like ä,ö,ü etc in them. if i convert this strings to a "const char" NSString *label = @"Küche"; const char *charLabel = [label UTF8String]; i get a strange output, where the ü is replaced with signs and boxes... what to do? 回答1: You can draw only ASCII characters with CGContextShowTextAtPoint . To draw

问题 I have a NSString that is a letter and another that is their signature. I need to combine both into a single string for display but the signature needs to display in a different font and size. Yes, both fonts and sizes are working on their own. Right now I have it as follows: NSString *letter; NSString *signOff; _paragraph.font = [UIFont fontWithName:@"BeinetCondensed" size:14]; _signature.font = [UIFont fontWithName:@"AnnoyingKettle" size:18]; letter = [_paragraph text]; signOff = [

问题 I'm trying to use localizedCaseInsensitiveContainsString() method introduced in iOS 8: let match = text.localizedCaseInsensitiveContainsString(searchText) Swift compiler says: 'String' does not have a member named 'localizedCaseInsensitiveContainsString' Documentation says: Swift automatically bridges between the String type and the NSString class. So, what's going on here? I know I can use (title as NSString) . I just want to know why. 回答1: I think you still need to cast it to not confuse

问题 I was getting random crashes in my app until I narrowed it down to a particular method. In that method I expect an NSString as a parameter. This NSString can sometimes be nil in which case the method ends and no harm is done. When I run my method's parameter through NSLog(@"%@", myString) I found that I get one of these: The contents of an actual NSString (null) <null> The first two are expected and handled by my method. The third one, <null> , crashes my app with -[NSNull length]: