如何通过指针指定颜色名称来设置颜色？

Question

正常，我经常通过以下方式设置背景颜色： aView.backgroundColor = [UIColor redColor];

现在我将所有颜色名称保存在NSArray中：

colorsArray = [[NSMutableArray alloc] initWithObjects:
               @"blackColor",
               @"darkGrayColor",
               @"lightGrayColor",
               @"whiteColor",
               @"grayColor",
               @"redColor",
               @"greenColor",
               @"blueColor",
               @"cyanColor",
               @"yellowColor",
               @"magentaColor",
               @"orangeColor",
               @"purpleColor",
               @"brownColor",
               nil];

我想通过类似

的NSString指针设置背景

NSInteger i = 0;
for (aView in viewArray) {
   NSString *colorName = [colorsArray objectAtIndex:i];
   aView.backgroundColor = color with colorName;//Can't find a method to set
   i++;
}

我检查UIColor类，找不到任何用colorName指针设置颜色的方法。 请帮忙！还有别的办法吗？谢谢！

Answer 1

一点点反思，药物就会消失......

NSInteger i = 0;
for (aView in viewArray) {
    NSString *colorName = [colorsArray objectAtIndex:i];
    aView.backgroundColor = [[UIColor class] performSelector:NSSelectorFromString(colorName)];
   i++;
}

Answer 2

aView.backgroundColor = [UIColor performSelector:NSSelectorFromString(colorName)];