iOS小项目中的一些小拾遗(关于UIColor颜色以及UIButton制作圆形按钮)

  [item setBackgroundColor:[UIColor colorWithRed:204 green:242 blue:233 alpha:1]];

    [item setBackgroundColor:[UIColor colorWithRed:204/255.0 green:242/255.0 blue:233/255.0 alpha:1]];

    item.layer.masksToBounds = YES;    item.layer.cornerRadius = (width + 10) / 4;