我正在开发一个iOS应用程序，其中需要改变UITabBar的高度。首先，我通过tabbar的frame属性改变了它，但这并没有给予期望的结果，图标尺寸也很小。所以，我写了下面的代码来改变tabbar的背景，并增加其图标的大小。

for (UIView *view in ctrl.tabBar.subviews) {
    if ([NSStringFromClass(view.class) isEqualToString:@"_UITabBarBackgroundView"]) {
        [view removeFromSuperview];
        
        CGRect frame = ctrl.tabBar.frame;
        frame.origin = CGPointZero;
        frame.size.height = floor(frame.size.height / 2);
        
        UIView *background = [[UIView alloc] initWithFrame:frame];
        background.backgroundColor = [UIColor colorWithRed:0.15 green:0.15 blue:0.15 alpha:1.0];
        background.userInteractionEnabled = NO;

        [ctrl.tabBar addSubview:background];
        [ctrl.tabBar sendSubviewToBack:background];
        
        [background release];
    }

    for (UIView *subview in view.subviews) {
        if ([NSStringFromClass(subview.class) isEqualToString:@"UITabBarSwappableImageView"]) {
            CGRect frame = subview.frame;
            frame.size.height = 80;
            subview.frame = frame;
            subview.contentMode = UIViewContentModeCenter;
        }
        
        if ([NSStringFromClass(subview.class) isEqualToString:@"UITabBarButtonLabel"]) {
            CGRect sFrame = subview.frame;
            sFrame.size.height += diff;
            subview.frame = sFrame;
        }
    }
}

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所以我想确认一下，“这个代码是否可以安全地通过审批？”