How can I specify aspect ratio?

[retsohuang]

I want user crop image with specify size (or aspect ratio e.g 4x3) and without any toolbar buttons, is that possible?

[TimOliver]

Hi Retso!

Oh... no that's no presently possible in the current implementation, sorry.

It would be relatively simple to implement though. You'd just need to modify the view controller class, and the toolbar class to properly expose some properties in order to control hiding the buttons and setting an initial aspect ratio.

I'm a bit too busy to do it right now, sorry, but if you feel like trying it out yourself, I'll happily accept a pull request. :)

Thanks!

[LewisTheobald]

Hi @retsohuang, I've just stumbled on this for a Swift project I'm working on and wanted something very similar. I created a new method in the view controller:

- (void)setInitialAspectRatio {

    // Create the aspect ratio
    CGSize aspectRatio = CGSizeMake(1.0f, 1.0f);

    // Set the aspect ratio
    [self.cropView setAspectLockEnabledWithAspectRatio:aspectRatio animated:false];

    // Set the button as active
    self.toolbar.clampButtonGlowing = true;
}

At the end of 'viewDidLoad' just fire that off:

[self setInitialAspectRatio];

Then under the 'resetCropViewLayout' method, put the same:

[self setInitialAspectRatio];

If you open TOCropToolbar, find the five rows starting with '_clampButton' and comment them out (that'll remove the button from showing altogether if you want it removed).

[retsohuang]

:+1:

[TimOliver]

Hahah thanks a lot guys!

I'll leave this issue open to remind me to actually add proper support for this. :)

[gitsakos]

I just did more or less the exact same thing as @LewisTheobald. However, it seems as though rotateImageNinetyDegreesAnimated does not respect the aspectLockEnabled property and will reset the aspect ratio when rotating.

So I went a little deeper and created a property called fixedAspectRatio. Then put the following code in both -viewDidLoad and -rotateCropView.

if (!CGSizeEqualToSize(fixedAspectRatio, CGSizeZero)) {
    [self.cropView setAspectLockEnabledWithAspectRatio:fixedAspectRatio animated:NO];
}

To hide the display of the clamp and reset buttons, I added properties/methods for those buttons analogous to the existing -setRotateButtonHidden in TOCropToolbar.

[TimOliver]

Hi guys! The ability to lock the crop view to a specific aspect ratio has now been merged in from another contributor. Hopefully it works for you. :)