How to zoom the image along with full screen when we tapped on it

Question

Hi i am beginner in Ios and in my project i am adding one image on my View controller and when we click on this image then image need to zoom with full screen size for this i wrote some code but image is not fitting properly

According to my code screen is coming like below image but in want to fill that image entire screen help me

My code is below:-

ViewController1.h

#import <UIKit/UIKit.h>

@interface ViewController1 : UIViewController<UIGestureRecognizerDelegate>
{
    UITapGestureRecognizer *tap;
    BOOL isFullScreen;
    CGRect prevFrame;
}
@property (nonatomic, strong) UIImageView *imageView;

@end

ViewController1.m

#import "ViewController1.h"

@interface ViewController1 ()

@end

@implementation ViewController1

- (void)viewDidLoad
{
    [super viewDidLoad];

    isFullScreen = FALSE;

    tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen)];

    tap.delegate = self;

    _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 100, 100)];
    _imageView.contentMode = UIViewContentModeScaleAspectFit;
    [_imageView setClipsToBounds:YES];
    _imageView.userInteractionEnabled = YES;
    _imageView.image = [UIImage imageNamed:@"2.jpg"];

    UITapGestureRecognizer *tapper = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen:)];
    tapper.numberOfTapsRequired = 1;

    [_imageView addGestureRecognizer:tapper];
    self.view.backgroundColor = [UIColor lightGrayColor];

    [self.view addSubview:_imageView];
}

-(void)imgToFullScreen:(UITapGestureRecognizer*)sender {

    if (!isFullScreen) {

        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{

            prevFrame = _imageView.frame;
            [_imageView setFrame:[[UIScreen mainScreen] bounds]];

        }completion:^(BOOL finished){
            isFullScreen = TRUE;
        }];
        return;
    }

    else{

        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            [_imageView setFrame:prevFrame];
        }completion:^(BOOL finished){
            isFullScreen = FALSE;
        }];
        return;
    }
}

@end

Answer 1

you need to set all on tap-gesture. you need to expand imageviewsize on tapgesture. or change the size of width and height according to your view controllers full screen's height and with.

Here is Example of tapgesture .

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
tapGesture.numberOfTapsRequired = 1;
tapGesture.cancelsTouchesInView = NO;
imageView.userInteractionEnabled = YES;
[imageView addGestureRecognizer:tapGesture];

-(void)handleTemplateTap:(UIGestureRecognizer *)sender
{
     imageview.frame=CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height);
}