Question

I’m doing something slightly or monumentally wrong.

I want to swap a UIColour for a programmable variable, for example:

NSString *DataColourTitle = @"greenColor";
[[UINavigationBar appearance] setTintColor: [UIColor [NSString stringWithFormat: @"%@", DataColourTitle]]];

I’m getting an Expected Identifier error at the NSString part and haven’t worked out the formatting required to accomplish this.

Answer 1

The syntax for calling a class method of UIColor would be [UIColor <#some selector#>] where <#some selector#> is an identifier such as greenColor, not a string. The selector that it expects is a reference to code that can return a UIColor object, whereas @"greenColor" is just a static, literal string of bytes wrapped up as a NSString object.

Try something like:

SEL green = NSSelectorFromString(@"greenColor");
UIColor *color = [UIColor performSelector:green];
[[UINavigationBar appearance] setTintColor: color];