for (UIView *tabbarbutton in self.subviews) {
// NSLog(@"%@",tabbarbutton);
if ([tabbarbutton isKindOfClass:NSClassFromString(@"_UITabBarBackgroundView")]) {
[tabbarbutton setValue:[UIColor orangeColor] forKeyPath:@"backgroundColor"];
for (UIView *obj in tabbarbutton.subviews) {
NSLog(@"obj:%@",obj);
obj.backgroundColor = [UIColor redColor];
for (UIView *v1 in obj.subviews) {
NSLog(@"v1_____:%@",v1);
if ([v1 isKindOfClass:NSClassFromString(@"_UIBackdropEffectView")]) {
v1.backgroundColor = [UIColor blueColor];
[v1 removeFromSuperview];
}
}
if ([obj isKindOfClass:NSClassFromString(@"_UIBackdropView")]) {
[obj removeFromSuperview];
}
}
}
if ([tabbarbutton isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
for (UIView *view in tabbarbutton.subviews) {
// NSLog(@"%@",view);
if ([view isKindOfClass:NSClassFromString(@"UITabBarSelectionIndicatorView")]) {
view.backgroundColor = [UIColor redColor];
view.layer.borderWidth = 2;
view.layer.borderColor = [UIColor blackColor].CGColor;
}
}
}
}
遍历的正是上图的结构，中间那个加号按钮是我自己另外加上去的，其它四个则分别代表一个控制器的tabbar
控制器是使用这个方法添加上去的:
如果你不想用许多button、view定制tabbar，那你就需要彻底的了解系统tabbar的结构，然后再去修改他的控制属性和结构，这遍文章正是对UITabBar彻底的解剖
第一层的遍历结果：
<_UITabBarBackgroundView: 0x12fe364a0; frame = (0 0; 375 49); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x1702217c0>>
看这一个的frame为(0 0; 375 49)及名字，那肯定是tabbar的背景图了,这个背景图下边还有好几层view，所以如你遍历到时这里的时候去设置_UITabBarBackgroundView的背景色的话是看不见的，因为这个_UITabBarBackgroundView在倒数第二层，最底有一个view暂时还不知道是干什么的，结合代码看上图:
_UITabBarBackgroundView 的下层 >> _UIBackdropView >> _UIBackdropEffectView 此时如果去改_UIBackdropEffectView的backcolor的话，是能看出效果的，只是好像有自带的半透明效果无法改变，或者我们把_UIBackdropView这个view removeFromSuperview,再设置_UITabBarBackgroundView的backcolor就能看到效果了
这一个名字是UIButton。那肯定是我另外添加的中间那个按钮
<UIButton: 0x12fd12650; frame = (155.5 2.5; 64 44); opaque = NO; layer = <CALayer: 0x174223680>>
下面这四个UITabBarButton分别代表四个控制器的tabbar按钮
<UITabBarButton: 0x12fd14620; frame = (2 1; 90 48); opaque = NO; layer = <CALayer: 0x174223a80>>
<UITabBarButton: 0x12fd19d00; frame = (96 1; 90 48); opaque = NO; layer = <CALayer: 0x1742246e0>>
<UITabBarButton: 0x12fd1d7e0; frame = (190 1; 89 48); opaque = NO; layer = <CALayer: 0x174224e20>>
<UITabBarButton: 0x12fe2fba0; frame = (283 1; 90 48); opaque = NO; layer = <CALayer: 0x170233e80>>
下面这一个UIImageView则是整条tabbar上边边缘的一个view，一般这个我们不会去改它，如下图，红色线条的位置：
<UIImageView: 0x12fe1cab0; frame = (0 -0.5; 375 0.5); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x1702356a0>>
第二层的遍历结果：
UITabBarSelectionIndicatorView代表上图中竖直红色黑色的那块view，注意：这个view需要在设置了这个self.selectionIndicatorImage属性时才会存在
<UITabBarSelectionIndicatorView: 0x14f6278f0; frame = (0 0; 90 48); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x174224cc0>>
UITabBarSwappableImageView就是上图中红色方块的view
<UITabBarSwappableImageView: 0x14f52a440; frame = (0 0; 30 30); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x170221d80>>
UITabBarButtonLabel 就不用多说了，就是下面那个label了,看text也可以
<UITabBarButtonLabel: 0x14f528400; frame = (0 0; 26 16); text = '首页'; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x170281180>>
<UITabBarSwappableImageView: 0x14f619f30; frame = (0 0; 30 30); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x174223840>>
<UITabBarButtonLabel: 0x14f61aa50; frame = (0 0; 26 16); text = '消息'; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x17409eb90>>
<UITabBarSwappableImageView: 0x14f622080; frame = (0 0; 30 30); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x174223f80>>
<UITabBarButtonLabel: 0x14f6216d0; frame = (0 0; 26 16); text = '发现'; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x17409f590>>
<UITabBarSwappableImageView: 0x14f6274b0; frame = (0 0; 30 30); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x174224ac0>>
<UITabBarButtonLabel: 0x14f626060; frame = (0 0; 13 16); text = '我'; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x17409fae0>>