nsstring

I am trying to create a String from Array.But, there is condition to how it should be generated, as explained below. NSArray *array=[NSArray arrayWithObjects:@"Hello",@"World",nil]; [array componentsJoinedByString:@","]; This will output: Hello,World. But, if first Item is Empty,then is there way to receive the only second one. Hello , @"" => Hello @"" , World => World Hello , World => Hello,World Alladinian Another way to do this is to grab a mutable copy of the array and just remove non valid objects. Something like this perhaps: NSMutableArray *array = [[NSArray arrayWithObjects:@"",@"World

I have a string as this. NSString *myString = @"{53} balloons"; How do I get the substring 53 ? NSString *myString = @"{53} balloons"; NSRange start = [myString rangeOfString:@"{"]; NSRange end = [myString rangeOfString:@"}"]; if (start.location != NSNotFound && end.location != NSNotFound && end.location > start.location) { NSString *betweenBraces = [myString substringWithRange:NSMakeRange(start.location+1, end.location-(start.location+1))]; } edit : Added range check, thx to Keab42 - good point. Here is what I did. NSString *myString = @"{53} balloons"; NSCharacterSet *delimiters =

How do I convert an object of type (NSObject, AnyObject) to the type String ? At the end of the first line of the method below, as String causes the compiler error: '(NSObject, AnyObject)' is not convertible to 'String' Casting street to NSString instead of String compiles, but I'm casting street to String because I want to compare it to placemark.name , which has the type String! , not NSString . I know name and street are optionals, but I'm assuming they're not nil for now because all the places returned from MKLocalSearch seem to have non-nil names and streets. func formatPlacemark

有待整理，下记录一下。 #import <Foundation/Foundation.h> @interface DJRandomMethodName : NSObject /** 随机一个实例方法名*/ + (NSString *)randomMethodName; /** 随机一个类方法名*/ + (NSString *)randomClassName; @end // // DJRandomMethodName.m // Test0801 // // Created by 曹敬贺 on 16/8/1. // Copyright © 2016年 北京无限点乐科技有限公司. All rights reserved. // #import "DJRandomMethodName.h" typedef enum { DJClassName, DJMethodName }DJNameType; @interface DJRandomMethodName () //内存中缓存数组 @property (nonatomic, strong) NSMutableArray * memoryArray; //随机生成的名字组成的数组 @property (nonatomic, strong) NSMutableArray * namesArray; @end static dispatch

How do you append a unichar character to NSMutableString ? unichar c = 'T'; NSMutableString *s = [NSMutableString stringWithString:@"MyString"]; // want s to become "MyStringT" https://discussions.apple.com/thread/1679290 suggests: [s appendString:[NSString stringWithCharacters:&c length:1]]; Looks too long / complicated... Use [NSString appendFormat:], so for above: [s appendFormat:@"%C", c]; Enjoy! 来源： https://stackoverflow.com/questions/29357205/appending-unichar-to-nsmutablestring