ios 把數組轉化爲json再轉化爲字符串、再去除空格和分隔符「\n」

- (NSString *)pictureArrayToJSON:(NSArray *)picArr {
    
    
    NSData *data=[NSJSONSerialization dataWithJSONObject:picArr options:NSJSONWritingPrettyPrinted error:nil];
    
    NSString *jsonStr=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
    
    //去除空格和回車：
    jsonStr = [jsonStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@" " withString:@""];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    NSLog(@"jsonStr==%@",jsonStr);
    return jsonStr;
}

 

 

//2.

json 字符串轉數組字典對象

- (NSArray *)dictionaryWithJsonString:(NSString *)jsonString {
    if (jsonString == nil) {
        return nil;
    }
    
    NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
    NSError *err;
    NSArray *dic = [NSJSONSerialization JSONObjectWithData:jsonData
                                                        options:NSJSONReadingMutableContainers
                                                          error:&err];
    if(err) {
        NSLog(@"json解析失敗：%@",err);
        return nil;
    }
    return dic;
}