UIViewController back button not shown
Multi tool use
rootViewController -> tabviewcontroller -> viewController1 -> viewController2
In such order, back button works fine but when viewController2 pops back to viewController1, viewController1's backbutton is not shown, so I cannot go back to tabviewcontroller.
What is the possible reason? Thanks for help.
Here is my storyboard
//after viewWillAppear
func initNavigation(){
//topItem is self.navigationController?.navigationBar.topItem
guard topItem != nil else {
return
}
//custom letButtonBar just make tabviewcontroller title at left
//other viewcontroller title is "" so position still at center
let leftButton = UIBarButtonItem(title: "", style:UIBarButtonItem.Style.plain, target: self, action: nil)
let attr = [NSAttributedString.Key.foregroundColor:UIColor.white, NSAttributedString.Key.font: UIFont(name: "iconfont", size: UIFont.buttonFontSize)!]
leftButton.setTitleTextAttributes(attr, for: .normal)
leftButton.setTitleTextAttributes(attr, for: .highlighted)
leftButton.setTitleTextAttributes(attr, for: .disabled)
leftButton.tintColor = UIColor.white
leftButton.isEnabled = false
topItem?.backBarButtonItem?.tintColor = UIColor.white
topItem?.setLeftBarButton(leftButton, animated: true)
topItem?.title = ""
}
//tabviewcontroller:
override func initNavigation() {
super.initNavigation()
topItem?.leftBarButtonItem?.title = "tabviewcontrollerTitleAtLeft"
}
//viewcontroller1
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController1TitleAtCenter"
}
//viewcontroller2
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController2TitleAtCenter"
}
I tried many times, found a solution, I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
ios swift
asked Dec 28 '18 at 3:09
J.Kuai
113
add a comment |
rootViewController -> tabviewcontroller -> viewController1 -> viewController2
In such order, back button works fine but when viewController2 pops back to viewController1, viewController1's backbutton is not shown, so I cannot go back to tabviewcontroller.
What is the possible reason? Thanks for help.
Here is my storyboard
//after viewWillAppear
func initNavigation(){
//topItem is self.navigationController?.navigationBar.topItem
guard topItem != nil else {
return
}
//custom letButtonBar just make tabviewcontroller title at left
//other viewcontroller title is "" so position still at center
let leftButton = UIBarButtonItem(title: "", style:UIBarButtonItem.Style.plain, target: self, action: nil)
let attr = [NSAttributedString.Key.foregroundColor:UIColor.white, NSAttributedString.Key.font: UIFont(name: "iconfont", size: UIFont.buttonFontSize)!]
leftButton.setTitleTextAttributes(attr, for: .normal)
leftButton.setTitleTextAttributes(attr, for: .highlighted)
leftButton.setTitleTextAttributes(attr, for: .disabled)
leftButton.tintColor = UIColor.white
leftButton.isEnabled = false
topItem?.backBarButtonItem?.tintColor = UIColor.white
topItem?.setLeftBarButton(leftButton, animated: true)
topItem?.title = ""
}
//tabviewcontroller:
override func initNavigation() {
super.initNavigation()
topItem?.leftBarButtonItem?.title = "tabviewcontrollerTitleAtLeft"
}
//viewcontroller1
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController1TitleAtCenter"
}
//viewcontroller2
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController2TitleAtCenter"
}
I tried many times, found a solution, I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
ios swift
asked Dec 28 '18 at 3:09
J.Kuai
113
I think you call initNavigation in some wrong place in ViewController1. Also why do you not use backItem to change back button title?
– Andrew Romanov
Dec 28 '18 at 6:40
I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
– J.Kuai
Jan 2 at 0:56
add a comment |
rootViewController -> tabviewcontroller -> viewController1 -> viewController2
In such order, back button works fine but when viewController2 pops back to viewController1, viewController1's backbutton is not shown, so I cannot go back to tabviewcontroller.
What is the possible reason? Thanks for help.
Here is my storyboard
//after viewWillAppear
func initNavigation(){
//topItem is self.navigationController?.navigationBar.topItem
guard topItem != nil else {
return
}
//custom letButtonBar just make tabviewcontroller title at left
//other viewcontroller title is "" so position still at center
let leftButton = UIBarButtonItem(title: "", style:UIBarButtonItem.Style.plain, target: self, action: nil)
let attr = [NSAttributedString.Key.foregroundColor:UIColor.white, NSAttributedString.Key.font: UIFont(name: "iconfont", size: UIFont.buttonFontSize)!]
leftButton.setTitleTextAttributes(attr, for: .normal)
leftButton.setTitleTextAttributes(attr, for: .highlighted)
leftButton.setTitleTextAttributes(attr, for: .disabled)
leftButton.tintColor = UIColor.white
leftButton.isEnabled = false
topItem?.backBarButtonItem?.tintColor = UIColor.white
topItem?.setLeftBarButton(leftButton, animated: true)
topItem?.title = ""
}
//tabviewcontroller:
override func initNavigation() {
super.initNavigation()
topItem?.leftBarButtonItem?.title = "tabviewcontrollerTitleAtLeft"
}
//viewcontroller1
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController1TitleAtCenter"
}
//viewcontroller2
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController2TitleAtCenter"
}
I tried many times, found a solution, I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
ios swift
asked Dec 28 '18 at 3:09
J.Kuai
113
rootViewController -> tabviewcontroller -> viewController1 -> viewController2
In such order, back button works fine but when viewController2 pops back to viewController1, viewController1's backbutton is not shown, so I cannot go back to tabviewcontroller.
What is the possible reason? Thanks for help.
Here is my storyboard
//after viewWillAppear
func initNavigation(){
//topItem is self.navigationController?.navigationBar.topItem
guard topItem != nil else {
return
}
//custom letButtonBar just make tabviewcontroller title at left
//other viewcontroller title is "" so position still at center
let leftButton = UIBarButtonItem(title: "", style:UIBarButtonItem.Style.plain, target: self, action: nil)
let attr = [NSAttributedString.Key.foregroundColor:UIColor.white, NSAttributedString.Key.font: UIFont(name: "iconfont", size: UIFont.buttonFontSize)!]
leftButton.setTitleTextAttributes(attr, for: .normal)
leftButton.setTitleTextAttributes(attr, for: .highlighted)
leftButton.setTitleTextAttributes(attr, for: .disabled)
leftButton.tintColor = UIColor.white
leftButton.isEnabled = false
topItem?.backBarButtonItem?.tintColor = UIColor.white
topItem?.setLeftBarButton(leftButton, animated: true)
topItem?.title = ""
}
//tabviewcontroller:
override func initNavigation() {
super.initNavigation()
topItem?.leftBarButtonItem?.title = "tabviewcontrollerTitleAtLeft"
}
//viewcontroller1
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController1TitleAtCenter"
}
//viewcontroller2
override func initNavigation() {
super.initNavigation()
self.navigationItem.title = "viewController2TitleAtCenter"
}
I tried many times, found a solution, I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
ios swift
ios swift
asked Dec 28 '18 at 3:09
J.Kuai
113
asked Dec 28 '18 at 3:09
J.Kuai
113
edited Jan 2 at 1:03
asked Dec 28 '18 at 3:09
J.Kuai
113
asked Dec 28 '18 at 3:09
J.Kuai
113
asked Dec 28 '18 at 3:09
J.Kuai
113
113
I think you call initNavigation in some wrong place in ViewController1. Also why do you not use backItem to change back button title?
– Andrew Romanov
Dec 28 '18 at 6:40
I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
– J.Kuai
Jan 2 at 0:56
add a comment |
I think you call initNavigation in some wrong place in ViewController1. Also why do you not use backItem to change back button title?
– Andrew Romanov
Dec 28 '18 at 6:40
I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
– J.Kuai
Jan 2 at 0:56
I think you call initNavigation in some wrong place in ViewController1. Also why do you not use backItem to change back button title?
– Andrew Romanov
Dec 28 '18 at 6:40
I think you call initNavigation in some wrong place in ViewController1. Also why do you not use backItem to change back button title?
– Andrew Romanov
Dec 28 '18 at 6:40
I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
– J.Kuai
Jan 2 at 0:56
I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
– J.Kuai
Jan 2 at 0:56
add a comment |
2 Answers
2
active
oldest
votes
It seems maybe you can have another UINavigationController between VCs like the following:
Hide the navigation bar of the first one. and use the second navigation bar as the root.
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
add a comment |
You should check how you are presenting and popping VCs. There is a possibility that it's caused by something relating to that.
answered Dec 28 '18 at 7:45
iampikuda
111
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
It seems maybe you can have another UINavigationController between VCs like the following:
Hide the navigation bar of the first one. and use the second navigation bar as the root.
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
add a comment |
It seems maybe you can have another UINavigationController between VCs like the following:
Hide the navigation bar of the first one. and use the second navigation bar as the root.
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
add a comment |
It seems maybe you can have another UINavigationController between VCs like the following:
Hide the navigation bar of the first one. and use the second navigation bar as the root.
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
It seems maybe you can have another UINavigationController between VCs like the following:
Hide the navigation bar of the first one. and use the second navigation bar as the root.
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
edited Dec 28 '18 at 6:12
Raptor
34.6k31175287
34.6k31175287
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
answered Dec 28 '18 at 3:50
E.Coms
1,6302412
1,6302412
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
add a comment |
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
Not this reason. I check my code, only one UINavigationController, one RootViewController
– J.Kuai
Dec 28 '18 at 5:08
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
As I remember, you can't put one UINavigationController into other navigation controller. It will produce a crash in runtime.
– Andrew Romanov
Dec 28 '18 at 6:42
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
its not crash in this case. The second nav is a child of tab.
– E.Coms
Dec 28 '18 at 14:13
add a comment |
You should check how you are presenting and popping VCs. There is a possibility that it's caused by something relating to that.
answered Dec 28 '18 at 7:45
iampikuda
111
add a comment |
You should check how you are presenting and popping VCs. There is a possibility that it's caused by something relating to that.
answered Dec 28 '18 at 7:45
iampikuda
111
add a comment |
You should check how you are presenting and popping VCs. There is a possibility that it's caused by something relating to that.
answered Dec 28 '18 at 7:45
iampikuda
111
You should check how you are presenting and popping VCs. There is a possibility that it's caused by something relating to that.
answered Dec 28 '18 at 7:45
iampikuda
111
answered Dec 28 '18 at 7:45
iampikuda
111
answered Dec 28 '18 at 7:45
iampikuda
111
answered Dec 28 '18 at 7:45
iampikuda
111
111
add a comment |
add a comment |
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I think you call initNavigation in some wrong place in ViewController1. Also why do you not use backItem to change back button title?
– Andrew Romanov
Dec 28 '18 at 6:40
I delete super.initNavigation() in viewcontroller1, it works fine finally, still do not know the reason.
– J.Kuai
Jan 2 at 0:56