Change UIIMage background color in iOS

Here is a function which returns an image with different background of you choice.

1. - (UIImage* )setBackgroundImageByColor:(UIColor *)backgroundColor withFrame:(CGRect )rect{
2. 
   
3. // tcv - temporary colored view
4. UIView *tcv = [[UIView alloc] initWithFrame:rect];
5. [tcv setBackgroundColor:backgroundColor];
6. 
   
7. 
   
8. // set up a graphics context of button's size
9. 
   

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UIImage Cropping in Objc

Sometimes we click picture from ios camera but it does not return us the same image as appears inside the camera frame. Use below function to get an image of exact size which was visible through camera.

Follow these Steps:-

Step 1. First of all set the captured image to an UIImageView.

Step 2. Pass that camera uiview to below function so that we can get visible frame of opened camera view.

Step 3. Also pass the UIImage (captured photo) as a param to below function.

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Make UIImage White Background Transparent in iOS

If you came across to a requirement where you want to make UIImage Background Transparent then use below method to achieve it.

1. +(UIImage *)changeWhiteColorTransparent: (UIImage *)image{
2. CGImageRef rawImageRef=image.CGImage;
4. const CGFloat colorMasking[6] = {222, 255, 222, 255, 222, 255};

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