iPhone在uitextView中将背景图像设置为文本？/

Question

I have a uiimageView containing the text like this .

I want to set the image background of the text to look like this instead .

Please help me! Thanks!

Answer 1

You will need to combine an image of the text with the background image (the stuff that is supposed to fill the inside of the text) using compositing . Take a look at the various blend modes you can use, or look into the use of CIFilter.

http://developer.apple.com/library/ios/#documentation/GraphicsImaging/Reference/CGContext/Reference/reference.html#//apple_ref/doc/c_ref/CGBlendMode

https://developer.apple.com/library/mac/#documentation/graphicsimaging/Reference/CoreImageFilterReference/Reference/reference.html

The thing in the background looks like it might be a gradient. Again, you can use a CIFilter to generate that gradient, or you can use Core Graphics. So you'll composite the drawn text with its fill image, then you'll draw that over a gradient.

Answer 2

代替黑色纯色文本，将具有透明文本和外部区域的图像作为所需的灰色渐变，然后将此图像放在背景图像上，即可得到所需的结果。