ObjC - 从数组中的对象获取值（NSMutableArray）

Question

I'm totally new to ObjC. I've already watched/read some tutorials. But now i would like to know how to make an array of objects and print out their values. I'm coming from a Java perspective. In Java it would look like this.

MyClass [] objects = new MyClass[100];

for(int i = 0; i < objects.length;i++)
   int value = i;
   objects[i] = new MyClass(value);

for(int i = 0; i < objects.length;i++)
   println(objects[i].value);

How would the equivalent in ObjC look like? I've only come that far:

NSMutableArray * objects = [NSMutableArray  arrayWithCapacity:100];

Answer 1

it could go something like this (take into account that it could be written more compact, but that would mystify the code for a beginner):

const int NR_ELEMENTS = 100;

NSMutableArray *objects = [NSMutableArray arrayWithCapacity:NR_ELEMENTS];

for (int i=0; i < NR_ELEMENTS; i++)
{
    MyClass *mc = [[MyClass alloc] initWith:i];
    [objects addObject:mc];
}

for (int i=0; i < NR_ELEMENTS; i++)
{
    // Suppose MyClass.value is integer
    NSLog(@"%i\n", [[objects objectAtIndex:i] value]);
}

Kind regards, PB

Answer 2

Not sure what your MyClass looks like, but if you wanted to add just integer objects you could do the following. Also, MutableArray resizes as needed so it is not quite like your case when you fix your array size to 100.

NSMutableArray *objects = [NSMutableArray arrayWithCapacity:100];

for(int i = 0; i < 100; ++i)
    [objects addObject:[NSNumber numberWithInt:i]];

for(id object in objects) {
    NSLog(@"%@\n",object);
}