How to optimize the picker view in iPhone?

Question

I want my picker view can display 1 - 200. but I think it is too much memory, if I assign an Array in this view:

self.myLargeView = [[NSArray alloc] initWithObjects:@"1 unit", @"2 units", .... ..., @"199 units" @"200 units", nil]; //code skipped 

How can I reduce the memory load in application? any ideas?

Answer 1

If the user has to just pick a number from 1 to 200, why not use a UISlider instead?

Answer 2

An array of 200 short NSStrings will not cause you any memory problems. It just takes up a few kilobytes.

Answer 3

If you want your picker view just to display an incremented number then you might use something like this:

#define kPickerValuesAmount 200

#pragma mark -
#pragma mark UIPickerViewDataSource methods

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;   
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return kPickerValuesAmount;
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    return [NSString stringWithFormat:@"%i unit%@", (row + 1), (row == 0 ? @"" : @"s")];
}