在superView中将containerView作为子视图移动

Question

following image describes the scenario. http://i.stack.imgur.com/PPm4e.png

On animate button press, the blue screen (or containerView) should move away from view and similarly come back to initial position on repress.

The code is working. But the containerView is not behaving as the subview of some other view. It should not come out of light gray colored view. Which is its super view. It should move up and down within its limits.

The simulator screen shots are as follows :

http://i.stack.imgur.com/SJjA5.png

http://i.stack.imgur.com/I98W8.png

Any suggestions are highly appreciated.

ViewController.m :-

@interface ViewController ()
{
    BOOL scrollUp;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    [self.containerBackgroundView addSubview:self.containerview];

    scrollUp = NO;
    [self animate:self];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.

}


- (IBAction)animate:(id)sender {

    if (scrollUp) {
        [self rollUpMenuPage];
        scrollUp = NO;
    }
    else
    {
        scrollUp = YES;
        [self unRollTheMenuPage];
    }

}

-(void)unRollTheMenuPage
{

    NSLog(@"containerview frame before unRoll : %@",[self.containerview description]);

    CGRect rect = CGRectMake(self.containerview.frame.origin.x, 0.0f, self.containerview.frame.size.width, self.containerview.frame.size.height);


    [UIView animateWithDuration:1.0f
                     animations:^{

                         self.containerview.frame = rect;
                     }
                     completion:^(BOOL finished){
                         // do something here if you wish.

                         NSLog(@"containerview frame after unRoll : %@",[self.containerview description]);

                     }];

}

-(void)rollUpMenuPage
{

    NSLog(@"containerview frame before roll up : %@",[self.containerview description]);

    CGRect rect = CGRectMake(self.containerview.frame.origin.x, -self.containerBackgroundView.frame.size.height, self.containerview.frame.size.width, self.containerview.frame.size.height);


    [UIView animateWithDuration:1.0f
                     animations:^{
                         self.containerview.frame = rect;
                     }
                     completion:^(BOOL finished){

                         NSLog(@"containerview frame after roll up : %@",[self.containerview description]);

                     }];


}

ViewController.h

@property (weak, nonatomic) IBOutlet UIView *containerBackgroundView;
@property (weak, nonatomic) IBOutlet UIView *containerview;

Current output :- http://screencast.com/t/bfLmJFYmym4

Issue is, when moving up it should not go above the light gray colored view.

Thanks

Answer 1

It looks to me like you have added a UINavigationBar (or some other toolBar) up top as a subview of your UIViewController's view, and that containerBackroundView (which is transparent bg colour) is over the top of that bar. Suggest you alter the frame.origin.y of containerBackgroundView so that it does not cover that top bar there or go beneath the status bar.

Answer 2

Ok, after re-creating your project and testing it you are right the view si drawn outside of it's superView bounds.

To undo this you can click the clip subviews property in the back view, so when the containerView steps out of the backView bounds it will be clipped and will not get drawn