Using a NSString to set a color for a label

Question

I want to create a method and use a string value "redColor" to set the UIColor for a label. tableColorName is the NSString "redColor" and I tried to apply a selector to create the UIColor and apply it to my textLabel. Thanks

-(void) changeLabelColor
{
    SEL labelColor = NSSelectorFromString([NSString stringWithFormat:[@"%@", tableColorName]]);

    UIColor *color = [[UIColor class] performSelector:labelColor];
    self.textLabel.textColor = color;
}

I'm not exactly sure! I do get the warning "PerformSelector may cause a leak because its selector is unknown" but all i know is that the textLabel is still black! — ShadyBaker, Mar 17 '13 at 00:29
for `performSelector` warning: http://stackoverflow.com/a/7933931/642626 — Bryan Chen, Mar 17 '13 at 00:50

Lithu T.V · Accepted Answer · 2013-03-17T00:37:49.100

10

Use this method

-(UIColor *)giveColorfromStringColor:(NSString *)colorname
{
    SEL labelColor = NSSelectorFromString(colorname);
    UIColor *color = [UIColor performSelector:labelColor];
    return color;
}

Call as

[view setBackgroundColor:[self giveColorfromStringColor:@"redColor"]];

The method name takes colorname as input and gives the corresponding UIColor

Thus in your case the call will be

self.textLabel.textColor = [self giveColorfromStringColor:@"redColor"];

edited Mar 17 '13 at 00:37

answered Mar 17 '13 at 00:31

Lithu T.V

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Worked for me. Now I just need to decide how to handle pink. – JScarry Feb 27 '15 at 19:37

Using a NSString to set a color for a label

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