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;
}
}
}
}
遍歷的正是上圖的結構，中間那個加號按鈕是我自己另外加上去的，其它四個則分別代表一個控制器的tabbar
控制器是使用這個方法添加上去的:
如果你不想用許多button、view定制tabbar，那你就需要徹底的了解系統tabbar的結構，然后再去修改他的控制屬性和結構，這遍文章正是對UITabBar徹底的解剖
第一層的遍歷結果：
<_UITabBarBackgroundView: 0x12fe364a0; frame = (0 0; 375 49); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x1702217c0>>
看這一個的frame為(0 0; 375 49)及名字，那肯定是tabbar的背景圖了,這個背景圖下邊還有好幾層view，所以如你遍歷到時這里的時候去設置_UITabBarBackgroundView的背景色的話是看不見的，因為這個_UITabBarBackgroundView在倒數第二層，最底有一個view暫時還不知道是干什么的，結合代碼看上圖:
_UITabBarBackgroundView 的下層 >> _UIBackdropView >> _UIBackdropEffectView 此時如果去改_UIBackdropEffectView的backcolor的話，是能看出效果的，只是好像有自帶的半透明效果無法改變，或者我們把_UIBackdropView這個view removeFromSuperview,再設置_UITabBarBackgroundView的backcolor就能看到效果了
這一個名字是UIButton。那肯定是我另外添加的中間那個按鈕
<UIButton: 0x12fd12650; frame = (155.5 2.5; 64 44); opaque = NO; layer = <CALayer: 0x174223680>>
下面這四個UITabBarButton分別代表四個控制器的tabbar按鈕
<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>>
下面這一個UIImageView則是整條tabbar上邊邊緣的一個view，一般這個我們不會去改它，如下圖，紅色線條的位置：
<UIImageView: 0x12fe1cab0; frame = (0 -0.5; 375 0.5); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x1702356a0>>
第二層的遍歷結果：
UITabBarSelectionIndicatorView代表上圖中豎直紅色黑色的那塊view，注意：這個view需要在設置了這個self.selectionIndicatorImage屬性時才會存在
<UITabBarSelectionIndicatorView: 0x14f6278f0; frame = (0 0; 90 48); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x174224cc0>>
UITabBarSwappableImageView就是上圖中紅色方塊的view
<UITabBarSwappableImageView: 0x14f52a440; frame = (0 0; 30 30); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x170221d80>>
UITabBarButtonLabel 就不用多說了，就是下面那個label了,看text也可以
<UITabBarButtonLabel: 0x14f528400; frame = (0 0; 26 16); text = '首頁'; 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 = '發現'; 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>>