iPhone UIView以编程方式替换图像颜色，如Photoshop或Illustrator

I have a set of graphics that I would like to reuse within my apps. They are buttons and images with transparency. Rather than having dozens of hard-coded button images, I would love to have a single button image, and be able to assign a color to it dynamically, like the navigation bar and it's tint color. I have a set of graphics that I would like to r