如何创建与已经拥有的对象相同类的新对象？

Question

I've an array which holds different kinds of objects: UIButton s, UILabel s, UITableView s, etc.

Is there any way that I can dynamically create these objects while looping through the array without using if / else conditions like below:

for (NSObject *obj in objectsArray)
{
    if ([obj isKindOfClass:[UIButton class]]) 
    {
         UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
         [self.view addSubview:btn];
    }
    else if ([obj isKindOfClass:[UILabel class]]) 
    {
        UILabel *lbl = (UILabel*)obj;
        [self.view addSubview:lbl];
    }
}

Can we create objects like UIButton *btn or UILabel *lbl using reflection or something dynamically?

Answer 1

you could either do

for (Class _class in classArray) {
    id object = [[_class alloc] init];
}

or

for (NSString *className in classNameArray) {
    id object = [[NSClassFromString(className) alloc] init];
}

so you dont need Instances for the class-reference.