Hi Venkatesh.
Sounds cool.
1. If you understand the model view controller pattern and the target action
paradigm, then it isn’t very hard to understand how things are supposed to be
wired up in the nib. In the case of the target action, a button has a target
and a message to send to that target witch is an action. The target is a
controller. So, you want to figure out how to connect the button to the action
method implemented by the controller. When you focus on what you want to do,
the steps will seem natural. Most of the time, there is very little difference
between the procedure you read about and the way that is possible using
voiceover.
A tableviewcontroller is just another kind of view controller. You would add
it to the storyboard the same way. All you need to do is click it with the
mouse in the library and weight until you hear vo say new window. Then press
enter.
I haven’t used Map Kit, but all you would do to use a MKMapView is select the
content view to be used, go to the identity inspector, and set the class to
MKMapView. You also need to enable your project to use maps. Yo can read
about all of that at
https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/LocationAwarenessPG/MapKit/MapKit.html
<https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/LocationAwarenessPG/MapKit/MapKit.html>.
I also recommend examining the Xcode templates and any sample projects you can
download from the apple developer sight. I found that to be a very good way to
learn how things work.
And, This tutorial covers everything we've talked about so far:
https://developer.apple.com/library/ios/referencelibrary/GettingStarted/RoadMapiOS/FirstTutorial.html
<https://developer.apple.com/library/ios/referencelibrary/GettingStarted/RoadMapiOS/FirstTutorial.html>.
2. You set constraints from the editor menu. There are also a couple of
useful controls on the canvas that you can use. I don’t know of any button
that looks like a space ship, but they might be talking about that. You never
need to use the mouse to set constraints.
3. I don’t use auto completion that much and I have completions as I type
turned off. However, you can bring up a list by pressing escape or
option-escape (not sure what the differences are, but they are both there) and
arrow through the list of options. Then press enter on the one you want. I
just tried it and it works for me.
4. UBarButtonItems are different from UIButtons so their properties look a
little different. In both cases however, buttons don’t have actions or events,
they send messages to a controller to perform actions or events. So, you
connected a selector to it’s sent actions.
Hope that helps.
On Aug 8, 2015, at 2:01 AM, venky...@gmail.com wrote:
Hi Barry,
Thank you so much for the help. I was able to do it and I built a stopwatch app!
I have a few more questions, not specific to navigation bars.
1. How do we figure these things out?
procedures to do certain tasks are quite different for voiceOver and non
VoiceOver users in xCode. How do we identify such scenarios? And, how do we
identify VoiceOver specific steps for such scenarios? For instance, in the next
steps, I will be dealing with tableViews, mapViews, etc. Do we simply drag and
drop with VoiceOver, or do we embed them like navigation controllers? Is there
a different procedure with VoiceOver for different sets of UI elements?
2. How do you do auto layout without using the mouse? If you know which
constraints to add, how do you add them to each of the elements in the user
interface? In the videos that I am following, the instructor talks about a
button that looks like a “space ship”. clicking this button presents the
developers with a set of options to choose from. How do we do this using
VoiceOver?
3. How do we take advantages of xCode suggestions with multiple options?
I faced great difficulty in typing a complicated line in particular in this
exercise. However, I observed that non VoiceOver users do this by typing some
amount of code, selecting from possible suggestions, and then typing where
needed. I was able to do this with VoiceOver to some extent, by pressing the
tab button. However, this seems to insert the first suggestion from the list of
possible suggestions. In the end, I had to copy-paste the line from the
original source provided. The line of code is:
timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector:
Selector("updateTime"), userInfo: nil, repeats: true)
How do we have VoiceOver speak the list of suggestions?
4. While connecting barButtonItems to my viewController.swift, I observed that
there were no touchUpInside option in the connections inspector. Trying to
connect using the button next to action also did not result in any output. Any
specific reason for this? However, connecting using the button next to selector
gave the desired output.
Thank you so much for your time and help.
Regards,
Venkatesh Potluri
Sent from my iPhone
On 04-Aug-2015, at 8:37 pm, Barry Hadder <bhad...@gmail.com
<mailto:bhad...@gmail.com>> wrote:
> Hi,
>
> When you set the title of the navigation item, it renames the view controller
> as well, so there’ isn’t any problem with that.
>
> The reason you aren't seeing the button is that you have it connected to the
> backBarButtonItem. Since the navigation bars app is the top most view
> controller, the button won’t show when you run the app because there isn’t
> anything to go back to.
> You might find the UINavigationItem reference helpful at
> https://developer.apple.com/library/ios/documentation/UIKit/Reference/UINavigationItem_Class/
>
> <https://developer.apple.com/library/ios/documentation/UIKit/Reference/UINavigationItem_Class/>.
>
> If you want to see the button, you could just connect it to the left or
> wright barbuttonitems instead.
> So, you haven’t done anything wrong and everything seems to be working
> correctly.
> Hope this helps.
>
> On Aug 4, 2015, at 8:35 AM, Venkatesh Potluri <venky...@gmail.com
> <mailto:venky...@gmail.com>> wrote:
>
> Hi Barry,
> Thank you so much for the clear explanation. I was able to go a step further,
> embed it and add a title to the navigation bar. However, when I add the
> title, I observe the viewController seen is renamed with the title. I also
> tried adding a barButtonItem as per your instructions and connect it one of
> the outlet from the navigation item in the now renamed seen to the
> barButtonItem. I named the barButtonItem “play”. When I run the app and
> navigate the simulator with VoiceOver, I hear VoiceOver speak only the title
> of the navigationBar. Where am I going wrong?
> My effort to add a navigationBar for now is to complete a tutorial to learn
> building apps for iOS. I am attaching 2 files that may help you get a clear
> idea of where I am going wrong.
> 1. “my implementation.zip” contains my xCode project. In this project, I
> attempted to add a navigation bar and a barButtonItem to it.
> 2. “original source.zip” contains the xCode project provided in the tutorial.
> My aim is to build a replica or an app similar to this.
> It would be of great help if you could help me identify my mistake.
> Once again, Thank you so much for taking the time to help me understand this.
> Thank you.
> Regards,
> Venkatesh Potluri
>
> On Mon, Aug 3, 2015 at 9:46 PM, Barry Hadder <bhad...@gmail.com
> <mailto:bhad...@gmail.com>> wrote:
> Hi,
>
> You drag a bar button from the library to the view controller seen.
> To connect the bar button to the nav bar, you find the navigation item in the
> view controller seen and drag from one of it’s outlets to the bar button.
> Let me know if that still isn’t clear.
>
> On Aug 3, 2015, at 10:10 AM, venky...@gmail.com <mailto:venky...@gmail.com>
> wrote:
>
> Thank U!
> That makes things a bit more clear.
> You said, to add UIBarButton items, drag onto the view controller seen.
> What exactly do I drag on to the view controller seen?
> You said, you drag from one of the navigation barButtonItems outlets. Didn't
> really get that part.
> If explaining through email would be difficult, I would be happy to contact
> you off list and we could set up a Skype call.
> I really appreciate your effort to explain this procedure in a clear way to
> me.
> Thank U so much for your time
> Regards,
> Venkatesh Potluri
>
> Sent from my iPhone
>
> On 03-Aug-2015, at 7:53 pm, Barry Hadder <bhad...@gmail.com
> <mailto:bhad...@gmail.com>> wrote:
>
>> This is the way you add a navigation bar to a view controller.
>> Select the view controller and in the editor->embed in menu choose
>> navigation controller.
>> To add UIBarButtonItems, drag on to the view controller seen. Then in that
>> same seen, you should find a navigation item. You set the title and make
>> connections from it. To add a button to the bar, you drag from one of the
>> navigation item’s outlets to the bar button.
>>
>> After embedding the view controller, you will also have a navigation
>> controller seen where the navigation bar is located. When you embedded the
>> view controller, it added it to the storyboard and connected it’s relation
>> segue to the view controller. You need to make sure that the navigation
>> controller is set as the initial view controller in the attributes inspector.
>>
>> Toolbars are different. To add a toolbar, just drag one to the content view
>> and position it at the bottom of the view.
>>
>> On Aug 2, 2015, at 10:44 PM, venky...@gmail.com <mailto:venky...@gmail.com>
>> wrote:
>>
>> Thank you for the help!
>> Could you explain in a bit more elaborate way?
>> Do I do what you suggested after adding in navigation bar? Moreover, is the
>> procedure similar for adding a toolbar?
>>
>> Sent from my iPhone
>>
>> On 02-Aug-2015, at 8:35 pm, Barry Hadder <bhad...@gmail.com
>> <mailto:bhad...@gmail.com>> wrote:
>>
>>> Hi,
>>>
>>>
>>>
>>> First, you would embed the view controller in a navigation controller from
>>> the editor menu.
>>>
>>> You should then find a navigation item in the controller seen when you
>>> expand the controller. You set the title of the bar in it’s inspector and
>>> make connections as well. In the connections inspector, drag from one of
>>> it’s outlets, e.g., backBarButtonItem, leftBarButtonItem,
>>> rightBarButtonItem to the bar button you dragged to that seen.
>>>
>>> On Sunday, August 2, 2015 at 1:52:56 AM UTC-5, Venkatesh Potluri wrote:
>>> Hi,
>>> Using voice over, I typically add labels, buttons and text fields by
>>> dragging them from the library to the document outlin in the Interface
>>> builder. I change the attributes such as the title, label text, et cetera
>>> using the attributes inspector. However, I am unable to change the title of
>>> the navigation bar in this way. How do I do that? Is dragging a bar button
>>> on to the navigation bar in the document outline the correct way to add bar
>>> buttons to the navigation bar?
>>> Thank you.
>>> Regards,
>>> Venkatesh
>>>
>>> Sent from my iPhone
>>>
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>>
>>
>>
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> <my implementation.zip><source implementation.zip>
>
> Barry Hadder
> bhad...@gmail.com <mailto:bhad...@gmail.com>
>
>
>
>
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