[摘要]本文是對NSString,NSArray和NSDictionary to JSON標准格式字符串的講解，對學習IOS蘋果軟件開發有所幫助,與大家分享。 #import<Foundation/Foundation.h> @interfaceNSString (HXAddtions) +(NSString *) jsonStringWithDictionary:(NSDictionary *)dictionary; +(NSString *) jsonStringWithArray:(NSArray *)array; +(NSString *) jsonStringWithString:(NSString *) string; +(NSString *) jsonStringWithObject:(id) object; +(void) jsonTest; @end // // NSString+HXAddtions.m // HXWeb // // Created by hufeng on 12-2-13. // Copyright (c) 2012年__MyCompanyName__. All rights reserved. // #import"NSString+HXAddtions.h" @implementationNSString (HXAddtions) +(void)jsonTest{ //test NSDictionary *dictionary1 = [NSDictionary dictionaryWithObjectsAndKeys: @"阿三\"\n11",@"name", @"18",@"age", nil]; NSDictionary *dictionary2 = [NSDictionary dictionaryWithObjectsAndKeys: @"阿四",@"name", @"20",@"age", nil]; NSArray *array = [NSArray arrayWithObjects:dictionary1,dictionary2,nil]; NSDictionary *dictionary3 = [NSDictionary dictionaryWithObjectsAndKeys: @"李\na",@"name", @"29",@"age", nil]; NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys: @"string",@"string", array,@"array", dictionary3,@"dictionary", nil]; NSLog(@"dictionary:%@",dictionary); NSString *jsonString = [NSString jsonStringWithObject:dictionary]; NSLog(@"dictionary jsonString:%@",jsonString); NSLog(@"%@",[NSDictionary dictionaryWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding]]); } +(NSString *) jsonStringWithString:(NSString *) string{ return[NSString stringWithFormat:@"\"%@\"", [[string stringByReplacingOccurrencesOfString:@"\n"withString:@"\\n"] stringByReplacingOccurrencesOfString:@"\""withString:@"\\\""] ]; } +(NSString *) jsonStringWithArray:(NSArray *)array{ NSMutableString *reString = [NSMutableString string]; [reString appendString:@"["]; NSMutableArray *values = [NSMutableArray array]; for(idvalueObjinarray) { NSString *value = [NSString jsonStringWithObject:valueObj]; if(value) { [values addObject:[NSString stringWithFormat:@"%@",value]]; } } [reString appendFormat:@"%@",[values componentsJoinedByString:@","]]; [reString appendString:@"]"]; returnreString; } +(NSString *) jsonStringWithDictionary:(NSDictionary *)dictionary{ NSArray *keys = [dictionary allKeys]; NSMutableString *reString = [NSMutableString string]; [reString appendString:@"{"]; NSMutableArray *keyValues = [NSMutableArray array]; for(inti=0; i<[keys count]; i++) { NSString *name = [keys objectAtIndex:i]; idvalueObj = [dictionary objectForKey:name]; NSString *value = [NSString jsonStringWithObject:valueObj]; if(value) { [keyValues addObject:[NSString stringWithFormat:@"\"%@\":%@",name,value]]; } } [reString appendFormat:@"%@",[keyValues componentsJoinedByString:@","]]; [reString appendString:@"}"]; returnreString; } +(NSString *) jsonStringWithObject:(id) object{ NSString *value =nil; if(!object) { returnvalue; } if([object isKindOfClass:[NSString class]]) { value = [NSString jsonStringWithString:object]; }elseif([object isKindOfClass:[NSDictionary class]]){ value = [NSString jsonStringWithDictionary:object]; }elseif([object isKindOfClass:[NSArray class]]){ value = [NSString jsonStringWithArray:object]; } returnvalue; } @end