在图像IOS中设置透明度

Question

I have a table view, I have addeed image as subview for header, but that image is shown with bagckground white color,how to set transparency for image.

TIA

Answer 1

For this you have to set alpha of your UIImageView

Your_ImageView.alpha = 0.6;

You can also do it in your xib file

Answer 2

Assuming the name of your view is myTransparentSubView:

[myTransparentSubView setBackgroundColor:[UIColor clearColor]];

If you are using the Interface Builder then set the background Color property accordingly within IB.

Answer 3

The simplest solution is to infact to create an image with a transparent background, however, you can use an Image Mask to get the desired effect.

There is already an example of this here .

Answer 4

Use image Preview in MAC

Start with a png file.

You have to go to View > Show Edit Toolbar.

Then widen the window so that you can see all of the icons.

Then click the icon that looks like a magic wand.

And then click and drag on the color you want to erase.