I'm trying to configure a dark gray seperator color. Why does the following do nothing?
self.tableView.seperatorStyle = UITableViewCellSeperatorStyleSingleLine; self.tableView.seperatorColor = [UIColor colorWithRed: 127 green:127 blue:127 alpha:1]; returns a table with no seperators at all.
As soon as I use [UIColor blackColor] then I get seperators just fine. What's the deal?
You need to divide by 255.0
Because I hardly ever use values between 1.0 and 0.0, I created a very simple UIColor category that does the messy looking division by itself: (from http://github.com/Jon889/JPGeneral)
//.h file @interface UIColor (JPExtras) + (UIColor *)colorWithR:(CGFloat)red G:(CGFloat)green B:(CGFloat)blue A:(CGFloat)alpha; @end //.m file @implementation UIColor (JPExtras) + (UIColor *)colorWithR:(CGFloat)red G:(CGFloat)green B:(CGFloat)blue A:(CGFloat)alpha { return [UIColor colorWithRed:(red/255.0) green:(green/255.0) blue:(blue/255.0) alpha:alpha]; } @end So you can just do(If you import the category I linked to above):
[UIColor colorWithR:127 G:127: B:127 A:1]; 
UIColor needs to support 'deep color' (that is, colors with a depth greater than 24 bit, or 32 with alpha). Of course, that still doesn't change the fact a built-in convenience method (along with hex support) would clearly be quite helpful to many developers!
Because your UIColor method requires a float from 0-1, not 0-255. You need to divide all your RGB values by 255.0, as follows:
self.tableView.seperatorColor = [UIColor colorWithRed:127.0f/255.0f green:127.0f/255.0f blue:127.0f/255.0f alpha:1.0f]; You have to divide your values with 255, because the range is 0-1. Take 127/255 = 0.49f and type in that instead. It's there, it's just white :)
edit: cause of comments, I added some code as to how I solve it:
-(float)getRGBValue:(int) rgbValue{ return rgbValue/255.0; ] There are two new methods in UIColor that accept integer values from 0 to 255:
UIColor(red: Int, green: Int, blue: Int) and
UIColor(alpha: Float, red: Int, green: Int, blue: Int) It's not in the documentation but I've used it and it works like a charm.