字符串转成字典

+(NSMutableDictionary *)lxlcustomDataToDic:(id)dic{

NSData *data=nil;

if (!dic) {

return nil;

}

if ([dic isKindOfClass:[NSData class]]) {

data=dic;

}else if([dic isKindOfClass:[NSString class]]){

data=[dic dataUsingEncoding:NSUTF8StringEncoding];

}else{

return nil;

}

return [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

}