iPhone SDK Multiple UIButton

iPhone SDK Creating a UIButton

UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.frame = CGRectMake(0, 0, 150, 190);
[self.view addSubview:myButton];

iPhone SDK Creating Multiple UIButton

for (int row = 0; row<4; row++){
        for (int col = 0; col<13;col++) {
            offset +=1;
            UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
            aButton.frame = CGRectMake(5+col*65+offset,5+row*65, 60, 60);
            [aButton setTitle:myarray[row][col] forState:UIControlStateNormal];
            [aButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];         

            [keyboardView addSubview: aButton];
        }
    }