How to call global method with parameters or arguments in IOS !!!

How to call global method with parameters or arguments in IOS

//SINGLETONCLASS.H
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import 

static NSString *databaseName1;
static NSString *databasePath1;
static sqlite3 *contactDB1;

@interface mysingleton : NSObject
{


//DATABASE STARTS

NSString *databaseName;
NSString *databasePath;
sqlite3 *contactDB;
NSMutableArray *nlatest;
}

@property (nonatomic, retain) NSString *databaseName;

@property (nonatomic, retain) NSString *databasePath;


+ (mysingleton *)sharedInstance;

+ (mysingleton * ) LoggErrors : (NSString *) string1 :(NSString *) string2 :(NSString*) string3;

@end


//SINGLETONCLASS.M

#import "mySingleton.h"

@implementation mysingleton

+ (mysingleton *)sharedInstance {
static dispatch_once_t once;
static mysingleton *instance;
dispatch_once(&once, ^{
instance = [[mysingleton alloc] init];
});
return instance;
}


- (id)init
{
if (self = [super init])
{

}
}

+ (mysingleton *)LoggErrors :(NSString*) string1 :(NSString*) string2 :(NSString*) string3
{
NSString *docsDir;
NSArray *dirPaths;

// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

docsDir = [dirPaths objectAtIndex:0];


// Build the path to the database file
databasePath1 = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: @“testDB.db"]];

NSFileManager *filemgr = [NSFileManager defaultManager];

if ([filemgr fileExistsAtPath: databasePath1 ] == YES)
{
const char *dbpath = [databasePath1 UTF8String];

if (sqlite3_open(dbpath, &contactDB1) == SQLITE_OK)
{
char *errMsg;

//INSERT DATA INTO LEVEL TABLE



}
}
sqlite3_close(contactDB1);


return nil;


}


@end

//ANY OTHERCLASS WHERE YOU WANT TO CALL THIS SINGLETON METHOD


//MYTESTCLASS
#import “testclass.h”
#import "mysingleton.h"


@interface testclass ()

@end

@implementation testclass

-(void)mymethod
{

NSString *string1=@“Somestring1”;
NSString *string2=@“Somestring2”;
NSString *string3=@“Somestring3”;

[mysingleton LoggErrors:string1 :string2 :string3 ] ;

}

@end