UIView设置阴影

//UIView设置阴影
    [[viewTest layer] setShadowOffset:CGSizeMake(1, 1)];
    [[viewTest layer] setShadowRadius:5];
    [[viewTest layer] setShadowOpacity:1];
    [[viewTest layer] setShadowColor:[UIColor blackColor].CGColor];
    //UIView设置边框
    [[viewTest layer] setCornerRadius:5];
    [[viewTest layer] setBorderWidth:2];
    [[viewTest layer] setBorderColor:[UIColor whiteColor].CGColor];
    [self.view addSubview:viewTest];