How can I animate displaying UIPickerView after pressing button?

Question

I want to animate my UIPickerView after pressing the button. I already have coded my UIPickerView to be hidden on viewDidLoad and not hidden after pressing a button, but it does

Answer 1

You can use below function to perform animation of picker view.

-(void)hideShowPickerView {

if (!isPickerDisplay) {
    [UIView animateWithDuration:0.25 animations:^{
        CGRect temp = self.categoryPicker.frame;
        temp.origin.y = self.view.frame.size.height - self.categoryPicker.frame.size.height;
        self.categoryPicker.frame = temp;
    } completion:^(BOOL finished) {
        NSLog(@"picker displayed");
        isPickerDisplay = YES;
    }];
}else {
    [UIView animateWithDuration:0.25 animations:^{
        CGRect temp = self.categoryPicker.frame;
        temp.origin.y = self.view.frame.size.height;
        self.categoryPicker.frame = temp;
    } completion:^(BOOL finished) {
        NSLog(@"picker hide");
        isPickerDisplay = NO;
    }];
}

}

Define isPickerDisplay as BOOL and initialize this in to ViewDidLoad as given below -

isPickerDisplay = YES;
[self hideShowPickerView];

This will manage hide and show functionality for UIPickerView.