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我在titleBar中有一个应用程序，它用于在3个导航控制器之间切换。我正在使用新的外观代理方法来设计这个segmentedControl（代码如下）。但是，似乎有某种我无法弄清楚的错误。当我潜入其中一个导航控制器然后导航回根（然后再次显示顶部栏中的segmentedControl）时，它就会出现。当发生这种情况时，屏幕截图就会变得混乱，就像你在屏幕截图中看到的那样（第一张图显示了它应该看起来的样子）。segmentedControl和UIAppearance代理的图形问题
有没有人遇到类似的东西，并知道如何解决它？
我的代码来设置appearence是：
UIImage *segmentSelected = [[UIImage imageNamed:@"sel"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];
UIImage *segmentUnselected = [[UIImage imageNamed:@"uns"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 3, 0, 3)];
UIImage *segmentSelectedUnselected = [[UIImage imageNamed:@"sel-uns"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];
UIImage *segUnselectedSelected = [[UIImage imageNamed:@"uns-sel"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];
UIImage *segmentUnselectedUnselected = [[UIImage imageNamed:@"uns-uns"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setBackgroundImage:segmentUnselected forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setBackgroundImage:segmentSelected forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setDividerImage:segmentUnselectedUnselected forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setDividerImage:segmentSelectedUnselected forLeftSegmentState:UIControlStateSelected rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setDividerImage:segUnselectedSelected forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setContentPositionAdjustment:UIOffsetMake(8, 0) forSegmentType:UISegmentedControlSegmentLeft barMetrics:UIBarMetricsDefault];
[[UISegmentedControl appearanceWhenContainedIn:[UINavigationBar class], nil]
setContentPositionAdjustment:UIOffsetMake(-8, 0) forSegmentType:UISegmentedControlSegmentRight barMetrics:UIBarMetricsDefault];
什么是应该的样子：
是什么样子：
