How to set black transparent for UILabel?

Question

I would like to set a transparent black background colour for a UILabel.

CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = label.frame;
[label.layer addSublayer:gradient];

Can I use a gradient to achieve this? Or should I use some other method? Please help me achieve this effect.

I would like to achieve the below effect:

yeah just now i seen the lot of answer its simple ,but just now i understood bro @VijayPalwe — Kishore Kumar, Feb 11 '16 at 13:07
you dont need to use cagradient layer for simple alpha change!! — Teja Nandamuri, Feb 11 '16 at 14:51
@Mr.T That isn't a duplicate of this question. That other question wants a fully clear background. This question does not. — rmaddy, Feb 11 '16 at 15:50
The title seemed similar to me.As the answers from the two questions shows same solution which is modifyng the alpha value,hence I thought it as duplicate. — Teja Nandamuri, Feb 11 '16 at 15:52

score 2 · Accepted Answer · answered Feb 11 '16 at 12:50

2

How about this?

label.backgroundColor = [UIColor colorWithRed:0/255.0 green:0/255.0 blue:0/255.0 alpha:0.7];

What you will adjust is alpha:0.7

answered Feb 11 '16 at 12:50

Fahim Parkar

Michaël Azevedo · Answer 2 · 2016-02-11T12:53:53.313

2

Just set the backgroundColorproperty of your UILabelto a color with an alpha channel different from 1 :

label.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5f];

edited Feb 11 '16 at 12:53

answered Feb 11 '16 at 12:51

Michaël Azevedo

1

are you sure `[[UIColor blackColor] 0.5]` will work? – Fahim Parkar Feb 11 '16 at 12:52
Oops while replacing the value, the whole colorWithAlphaComponent got selected. Nice catch ! – Michaël Azevedo Feb 11 '16 at 12:53

score 1 · Answer 3 · answered Feb 11 '16 at 12:51

1

set simple like

label.opaque = NO;

the above choice is not work try

   yourLabel.backgroundColor = [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:0.4];

Obviously you can change the RGB colors to what you want.

answered Feb 11 '16 at 12:51

Anbu.Karthik

bro y we have to give label.opaque = NO; – Kishore Kumar Feb 11 '16 at 13:07
if you set it will set automatically decrase transparency ... – Anbu.Karthik Feb 11 '16 at 13:08
KArthik thank you bro – Kishore Kumar Feb 11 '16 at 13:18

3 Answers3