In iOS7 you can use a new property in order to redraw an UIImage so you can have it with the same color as the tint color.
Here is an example:
UIImage *backButtonImage = [UIImage imageNamed:@"imageName.png"];
backButtonImage = [backButtonImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
Finally you will need to set either the setTintColor
property of the object where you adding that UIImage
or the property in the whole project.
Hope this helps!