ios - 如何在 IOS 中动态设置背景颜色？

Question

我需要在 iOS 中使用字符串值设置背景颜色。它应该通过动态方式完成。怎么可能？

Answer 1

myColors = @[@"redColor", @"greenColor", @"blueColor", @"yellowColor",@"blackColor",@"cyanColor",@"magentaColor",@"purpleColor",@"grayColor"]; // NSArray contains value//   
    int a = arc4random() % 9;  //select random value//



  SEL abc = NSSelectorFromString([myColors objectAtIndex:a]);
          [_canvas setBackgroundColor:[UIColor performSelector:abc]];