iOS resizing image resolution

[uaecasher]

hello,

I'm wondering if anyone can tell me how to change the image resolution when it have been picked from uiimagepickercontroller ?

thanks

 

[kainjow]

You need to create a new image that is the size you want and then draw the existing image into that image.

There is a generic way to do it via CGBitmapContext but for the iPhone you should use UIGraphicsBeginImageContext, UIGraphicsGetCurrentContext, CGContextDrawImage, UIGraphicsGetImageFromCurrentImageContext, and UIGraphicsEndImageContext.

Edit: I should add, CGContextDrawImage will automatically scale the image to fit whatever rect you pass it.

 

[dejo]

Plus, there are some open-source libraries you can search for that extend the UIImage Class to do image-resizing.

 

[uaecasher]

Plus, there are some open-source libraries you can search for that extend the UIImage Class to do image-resizing.

do you know any ?

 

[dejo]

do you know any ?

Via Trevor's Bike Shed: Resize a UIImage the right way

 

[uaecasher]

Via Trevor's Bike Shed: Resize a UIImage the right way

Thanks, I'm wondering does that change the resolution only or actually crops the image, I know there are deferent examples but all of them seem to crop the image

 

[dejo]

Thanks, I'm wondering does that change the resolution only or actually crops the image, I know there are deferent examples but all of them seem to crop the image

Did you read that page yet?

 

[uaecasher]

Did you read that page yet?

I did actually, but not quite understanding the code, so I'm reading it again ;p