objective-c - 删除 UIColor CGColor - KVC 警告

Question

如何去除[[UIColor grayColor] CGColor]愚蠢的警告？

[self setValue:
     [[UIColor grayColor] CGColor] 
          forKeyPath:[NSString stringWithFormat:@"_View_%@%d.layer.borderColor", 
              i>=10?@"":@"0", i]];

Incompatible pointer types sending 'CGColorRef' (aka 'struct CGColor *') to parameter of type 'id'

谢谢。

Answer 1

将 CGColor 转换为 id 类型:

[self setValue:
     (id)[[UIColor grayColor] CGColor] 
          forKeyPath:[NSString stringWithFormat:@"_View_%@%d.layer.borderColor", 
              i>=10?@"":@"0", i]];