Objective-c create variables in a loop

Is there a way to create variables inside of a loop. Basically something like this, except开发者_Python百科 that the variables variable1, variable2 and variable3 would exist.

int x;

for (x = 1; x < 4; x++) {
   int variable[x]; 
   variable[x] = x;
}

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Nope, there isn't.

But you can do something like this:

NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
for (int i = 0; i < 4; i++) {
    [dictionary setObject:[NSNumber numberWithInt:i] forKey:[NSString stringWithFormat:@"%i", i]];
}

This will save your xs in an NSMutableDictionary, which is comparable to an associative array in other languages.

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You are thinking about variable names incorrectly. What you are looking for is a data structure such as an array which is index based or a dictionary (hash table) to hold these values.

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YOu could use an array and set each value however you like. in your example you have a fixed for loop, so you can define an array of 4, and iterate.

Code:

NSMutableArray *myArray = [NSMutableArray arrayWithCapacity:4];

for (int x=0; x<4; x++)
{
    [myArray addObject:x]; 
}
//you now have an array of 4 int like this: [1,2,3,4]