iOS获取时间戳,字典转换成json数据

//获取时间戳

+ (NSString *)getTimesTamp

{

NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];

NSTimeInterval a=[dat timeIntervalSince1970];

NSString *timeString = [NSString stringWithFormat:@"%.0f", a];

return timeString;

}

// 字典转化为json数据

+(NSString*)mutableDictionaryToJson:(NSMutableDictionary *)dic

{

NSError *parseError = nil;

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];

return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

}

// 字典转化为json数据

+(NSString*)dictionaryToJson:(NSDictionary *)dic

{

NSError *parseError = nil;

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];

return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

}