UIImagePickerController fit camera overlay on different screen sizes - ios

Question

I made a custom overlay for a UIImagePickerController and it works great on an iPhone 5, but when tested on a 4 or 4S the overlay is too big.
How can I make my overlay fit properly on both screen sizes?
Here is my init method for my camera overlay.
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.opaque = NO;
self.backgroundColor = [UIColor clearColor];
// load an image to show in the overlay
UIImage *constraints = [UIImage imageNamed:#"camera_overlay"];
UIImageView *constraintView = [[UIImageView alloc]initWithImage:constraints];
CGRect screenRect = [[UIScreen mainScreen]bounds];
constraintView.frame = CGRectMake(27, 10, screenRect.size.width - 50, screenRect.size.height - 80);
[self addSubview:constraintView];
_shootButton = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *shootImage = [UIImage imageNamed:#"cameraOverlayShootButton"];
UIImage *shootImageDown = [UIImage imageNamed:#"cameraOverlayShootDown"];
[_shootButton setBackgroundImage:shootImage forState:UIControlStateNormal];
[_shootButton setBackgroundImage:shootImageDown forState:UIControlStateHighlighted];
_shootButton.frame = CGRectMake(115, 465, 85, 85);
[self addSubview:_shootButton];
_cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *cancelImage = [UIImage imageNamed:#"cancelButton"];
[_cancelButton setBackgroundImage:cancelImage forState:UIControlStateNormal];
_cancelButton.frame = CGRectMake(265, 505, 25, 25);
[self addSubview:_cancelButton];
_flashButton = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *flashImage = [UIImage imageNamed:#"autoFlash"];
[_flashButton setBackgroundImage:flashImage forState:UIControlStateNormal];
_flashButton.frame = CGRectMake(8, 10, 40, 40);
[self addSubview:_flashButton];
}
return self;
}

Answer 1

Try this....
Step 1:
First create IBOutlet for UIImageview.
-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *mediaType = info[UIImagePickerControllerMediaType];
[self dismissViewControllerAnimated:YES completion:nil];
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
OriginalImage=info[UIImagePickerControllerOriginalImage];
image = info[UIImagePickerControllerOriginalImage];
//----------------------------------------
imageview.image = image; //------------- additional method for custom image size
[self resizeImage];
//-----------------------------------------
if (_newMedia)
UIImageWriteToSavedPhotosAlbum(image,self,#selector(image:finishedSavingWithError:contextInfo:),nil);
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
// Code here to support video if enabled
}
}
Step 2: Add this method to get image in common size in all devices
-(void)resizeImage
{
UIImage *resizeImage = imageview.image;
float width = 320;
float height = 320;
CGSize newSize = CGSizeMake(320,320);
UIGraphicsBeginImageContextWithOptions(newSize,NO,0.0);
CGRect rect = CGRectMake(0, 0, width, height);
float widthRatio = resizeImage.size.width / width;
float heightRatio = resizeImage.size.height / height;
float divisor = widthRatio > heightRatio ? widthRatio : heightRatio;
width = resizeImage.size.width / divisor;
height = resizeImage.size.height / divisor;
rect.size.width = width;
rect.size.height = height;
//indent in case of width or height difference
float offset = (width - height) / 2;
if (offset > 0) {
rect.origin.y = offset;
}
else {
rect.origin.x = -offset;
}
[resizeImage drawInRect: rect];
UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
imageview.image = smallImage;
imageview.contentMode = UIViewContentModeScaleAspectFit;
}