json的几种转换

最新推荐文章于 2025-07-23 20:38:24 发布

转载最新推荐文章于 2025-07-23 20:38:24 发布 · 57 阅读

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原文链接：http://www.cnblogs.com/yuanjunliang/articles/4712700.html

本文详细介绍了如何使用Objective-C实现字符串到JSON字典和字典到JSON字符串的转换过程，包括处理换行符和双引号的方法。

+(NSString *) jsonStringWithString:(NSString *) string{

    return [NSString stringWithFormat:@"\"%@\"",
            [[string stringByReplacingOccurrencesOfString:@"\n" withString:@"\\n"] stringByReplacingOccurrencesOfString:@"\""withString:@"\\\""]
            ];
}
+(NSString *) jsonStringWithDictionary:(NSDictionary *)dictionary{
    NSArray *keys = [dictionary allKeys];
    NSMutableString *reString = [NSMutableString string];
    [reString appendString:@"{"];
    NSMutableArray *keyValues = [NSMutableArray array];
    for (int i=0; i<[keys count]; i++) {
        NSString *name = [keys objectAtIndex:i];
        id valueObj = [dictionary objectForKey:name];
        NSString *value = [self jsonStringWithObject:valueObj];
        if (value) {
            [keyValues addObject:[NSString stringWithFormat:@"\"%@\":%@",name,value]];
        }
    }
    [reString appendFormat:@"%@",[keyValues componentsJoinedByString:@","]];
    [reString appendString:@"}"];
    return reString;
}
+(NSString *) jsonStringWithObject:(id) object{
    NSString *value = nil;
    if (!object) {
        return value;
    }
    if ([object isKindOfClass:[NSString class]]) {
        value = [self jsonStringWithString:object];
    }else if([object isKindOfClass:[NSDictionary class]]){
        value = [self jsonStringWithDictionary:object];
    }else if([object isKindOfClass:[NSArray class]]){
        value = [self jsonStringWithArray:object];
    }
    return value;
}
+(NSString *) jsonStringWithArray:(NSArray *)array{
    NSMutableString *reString = [NSMutableString string];
    [reString appendString:@"["];
    NSMutableArray *values = [NSMutableArray array];
    for (id valueObj in array) {
        NSString *value = [self jsonStringWithObject:valueObj];
        if (value) {
            [values addObject:[NSString stringWithFormat:@"%@",value]];
        }
    }
    [reString appendFormat:@"%@",[values componentsJoinedByString:@","]];
    [reString appendString:@"]"];
    return reString;
}

具体根据情况使用

转载于:https://www.cnblogs.com/yuanjunliang/articles/4712700.html