For a `UITextField` or editable `UITextView`:

    [myTextField setReturnKeyType:UIReturnKeyGo];

You can also configure this in Interface Builder, under **Text Input Traits** for your text field/view:

![](http://i.stack.imgur.com/rMMLa.png)

In Xamarin.iOS or Monotouch is:

    myTextField.ReturnKeyType = UIReturnKeyType.Go;

Possible values are:

       Default
       Go
       Google
       Join
       Next
       Route
       Search
       Send
       Yahoo
       Done
       EmergencyCall
       Continue

    myTextField.returnKeyType =  UIReturnKeyType.Go


Other options for return key name can be found at: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITextInputTraits_Protocol/#//apple_ref/c/tdef/UIReturnKeyType


You can use this simple way: `[textField setReturnKeyType:UIReturnKeyGo];` instead of &quot;Add&quot; button.

Other, you create a programmatically keyboard with buttons which you want.


I&#39;ve installed Oracle Database 10g Express Edition (Universal) with the default settings:

    SELECT * FROM NLS_DATABASE_PARAMETERS;

&lt;!-- language: lang-none --&gt;

    NLS_CHARACTERSET               AL32UTF8                                 
    NLS_NCHAR_CHARACTERSET         AL16UTF16                                


Given that both `CHAR` and `NCHAR` data types seem to accept multi-byte strings, what is the exact difference between these two column definitions?    

    VARCHAR2(10 CHAR)
    NVARCHAR2(10)


Difference between VARCHAR2(10 CHAR) and NVARCHAR2(10)

is there a way to know the compiler instantiated code for a template function or a class in C++

Assume I have the following piece of code

    template &lt; class T&gt; T add(T a, T b){
                return a+b;
    }

now when i call

    add&lt;int&gt;(10,2); 

I would like to know the function that compiler creates for int specific version.

I am using G++, VC++. It will be helpful if some can help me point out the compiler options to achieve this.

Hope the question is clear. Thanks in advance.




Can we see the template instantiated code by C++ compiler

Is there a way to use the keyboard with &quot;Go&quot; key instead of the &quot;Return&quot; key like when you are accessing login fields in Safari? I&#39;m guessing this should be something trivial but my searches aren&#39;t turning up anything. :(

Thanks in advance.

iOS keyboard with &quot;Go&quot; button instead of return

<p>Is there a way to use the keyboard with "Go" key instead of the "Return" key like when you are accessing login fields in Safari? I'm guessing this should be something trivial but my searches aren't turning up anything. :(</p>
<p>Thanks in advance.</p>


Is there anything similar to the `viewDidLoad` of `UIViewController` for a `UIView`???
I need to be notified as soon as a `UIView` has loaded (Subclass of `UIView`), and perform some actions.

UIView - How to get notified when the view is loaded?

What&#39;s the usual way to store c-structures in an `NSArray`? Advantages, disadvantages, memory handling?

Notably, what&#39;s the difference between `valueWithBytes` and `valueWithPointer`  -- raised by justin and catfish below.

[Here&#39;s a link][1] to Apple&#39;s discussion of `valueWithBytes:objCType:` for future readers...

For some lateral thinking and looking more at performance, Evgen has raised the issue of using `STL::vector` in **C++**.

*(That raises an interesting issue: is there a fast c library, not unlike `STL::vector` but much much lighter, that allows for the minimal &quot;tidy handling of arrays&quot; ...?)*

So the original question...

For example:

    typedef struct _Megapoint {
    	float	w,x,y,z;
    } Megapoint;

So: what&#39;s the normal, best, idiomatic way to store one&#39;s own structure like that in an `NSArray`, and how do you handle memory in that idiom?

Please note that I am specifically looking for the usual idiom to store structs.  Of course, one could avoid the issue by making a new little class. However I want to know how the usual idiom for actually putting structs in an array, thanks.

BTW here&#39;s the NSData approach which is perhaps? not best...

    Megapoint p;
    NSArray *a = [NSArray arrayWithObjects:
    	[NSData dataWithBytes:&amp;p length:sizeof(Megapoint)],
    	[NSData dataWithBytes:&amp;p length:sizeof(Megapoint)],
    	[NSData dataWithBytes:&amp;p length:sizeof(Megapoint)],
    		nil];

BTW as a point of reference and thanks to Jarret Hardie, here&#39;s how to store `CGPoints` and similar in an `NSArray`:

    NSArray *points = [NSArray arrayWithObjects:
    		[NSValue valueWithCGPoint:CGPointMake(6.9, 6.9)],
    		[NSValue valueWithCGPoint:CGPointMake(6.9, 6.9)],
    		nil];

(see https://stackoverflow.com/questions/899600/how-can-i-add-cgpoint-objects-to-an-nsarray-the-easy-way)

  [1]: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/NumbersandValues/Articles/Values.html#//apple_ref/doc/uid/20000174-BAJJHDEG

What&#39;s the best way to put a c-struct in an NSArray?

What is the difference between iPhone Simulator and Android emulator? I have heard  people saying that Emulator really emulates the target device which is not true in case of simulator.

I think Android emulator mimics the processing speed of the target device, the memory usage, but a simulator does not emulate the device.

Difference between iPhone Simulator and Android Emulator

I would like to place an icon left of the two lines of text such that there&#39;s about 2-3 pixels of space between the image and the start of text. The control itself is Center aligned horizontally (set through Interface Builder)

The button would resemble something like this:

    |                  |
    |[Image] Add To    |
    |        Favorites |

I&#39;m trying to configure this with contentEdgeInset, imageEdgeInsets and titleEdgeInsets to no avail. I understand that a negative value expands the edge while a positive value shrinks it to move it closer to the center.

I tried:

    [button setTitleEdgeInsets:UIEdgeInsetsMake(0, -image.size.width, 0, 0)];
    [button setImageEdgeInsets:UIEdgeInsetsMake(0, button.titleLabel.bounds.size.width, 0, 0)];

but this doesn&#39;t display it correctly. I&#39;ve been tweaking the values but going from say -5 to -10 on the left inset value doesn&#39;t appear to move it in expected manner. -10 will scoot the text all the way to the left so I expected -5 to scoot it half way from the left side but it doesn&#39;t. 

What&#39;s the logic behind insets? I&#39;m not familiar with image placements and related terminology.

I used this SO question as a reference but something about my values isn&#39;t right.
https://stackoverflow.com/questions/2451223/uibutton-how-to-center-an-image-and-a-text-using-imageedgeinsets-and-titleedgein



Aligning text and image on UIButton with imageEdgeInsets and titleEdgeInsets

Is it possible to make a phone number clickable in HTML so that when a user clicks on the number it is called?

Is there a way to make a phone number clickable on an iphone or android phone to make a call in HTML?

I&#39;m new to Objective C. I have basic knowledge in C, including the concept of pointers. I have two basic questions:

 1. Can someone explain the difference between assign,copy, and retain with some analogy?
 2. How do you handle a function which returns pointer variable, and how do you perform messaging through a return pointer?

Objective C - Assign, Copy, Retain


From [forum discussion][1] , seem like that the big difference is performance factor, allocWithZone: will alloc memory from particular memory area, which reduce cost of swapping. 

In practice, almost get no chance to use allocWithZone: , anyone can give simple example to illustrate which case to use allocWithZone: ? 

Thanks,


  [1]: http://forums.macrumors.com/showthread.php?t=1048776

what is difference between alloc and allocWithZone:?

&gt; **Possible Duplicate:**  
&gt; https://stackoverflow.com/questions/2548008/how-can-i-compare-two-dates-return-a-number-of-days  

&lt;!-- End of automatically inserted text --&gt;

I have two dates (as NSString in the form &quot;yyyy-mm-dd&quot;), for example:

    NSString *start = &quot;2010-11-01&quot;;
    NSString *end = &quot;2010-12-01&quot;;

I&#39;d like to implement:

    - (int)numberOfDaysBetween:(NSString *)startDate and:(NSString *)endDate {
    
    }


Calculating the number of days between two dates in Objective-C

My app was accepted by Apple today and I am trying to figure out how many times it has been downloaded. Does anybody know how often the sales stats are updated on iTunes Connect? Is it once per day? If so, at what time is it updated?

How often are sales stats updated on iTunes Connect?

According to the Apple iOS mantra it should be possible to scroll the contents of an IFRAME by dragging it with two fingers.  Unfortunately running the latest version of iOS on the iPad I have yet to find a single website with an IFRAME that scrolls using this method - no scrollbars appear either.

Does anyone know how a user is supposed to scroll the contents of an IFRAME with the mobile Safari?

IFRAMEs and the Safari on the iPad, how can the user scroll the content?

Is there a way to detect if the current user is using an iPad using jQuery/JavaScript?

Detect iPad users using jQuery?

How do I get the jQuery-UI sortable feature working on iPad and other touch devices?

http://jqueryui.com/demos/sortable/

I tried to using `event.preventDefault();`, `event.cancelBubble=true;`, and `event.stopPropagation();` with the `touchmove` and the `scroll` events, but the result was that the page does not scroll any longer.

Any ideas?

jquery-ui sortable | How to get it work on iPad/touchdevices?

I&#39;ve written an HTML5-based iOS web application and all seems to be working well, but I&#39;m trying to polish it up with multiple startup screens. The iPhone/iPod touch works well w/a PNG of 320x460, as follows:

    &lt;link rel=&quot;apple-touch-startup-image&quot; href=&quot;img/startup_screen-320x460.png&quot; /&gt;

I found plenty of documentation that says the startup images for the iPad should, like the iPhone/iPod touch, have the 20px shaved from the height to accommodate for the status bar giving resolutions of 768x1004 (portrait) or 1024x748 (landscape). However, in my testing (currently w/an iPad running iOS 3.2.2), only the 768x1004 (portrait) resolution works (but is incorrect—20px too narrow—when in landscape mode).

I&#39;ve tried the following (a wild guess based on the functionality of the `apple-touch-icon` links), to no avail:

    &lt;link rel=&quot;apple-touch-startup-image&quot; href=&quot;img/startup_screen-320x460.png&quot; /&gt;
    &lt;link rel=&quot;apple-touch-startup-image&quot; sizes=&quot;1024x748&quot; href=&quot;img/startup_screen-1024x748.png&quot; /&gt;
    &lt;link rel=&quot;apple-touch-startup-image&quot; sizes=&quot;768x1004&quot; href=&quot;img/startup_screen-768x1004.png&quot; /&gt;

Only the 768x1004 resolution image works if it&#39;s the last `link` element listed. If the 1024x748 resolution image is last, a gray background is rendered in its stead (but never the 768x1004). So, obviously the `apple-touch-startup-image` `link` doesn&#39;t support the `sizes` attribute.

Is this supported in newer versions of the iOS? Is there any way to support multiple startup images? Should I create a 1024x768 startup image? If so, will is be scaled down for the iPhone/iPod touch? Or, should I just give up and not have a startup image for the iPad?

Multiple &quot;apple-touch-startup-image&quot; resolutions for iOS web app (esp. for iPad)?

I want to have a view in which there are vehicles driving around that the user can also drag and drop. What do you think is the best large-scale strategy for doing this? Is it best to get touch events from the views representing the vehicles, or from the larger view? Is there a simple paradigm you&#39;ve used for drag and drop that you&#39;re satisfied with? What are the drawbacks of different strategies?

Basic Drag and Drop in iOS

I need to convert a nsindexpath var into NsInteger or simply an int.
e.g: 

     int rowIndex = [mGoogleBaseTable selectedRow];
     //mGoogleBaseTable is a NSTable type in Macdevelopement..

&amp;&amp;

    int rowIndex = [mGoogleBaseTable indexPathForSelectedRow];
    //mGoogleBaseTable is a UITableView type in Iphone (iOS)Development.

selectedRow returns NSInteger simply but indexPathForSelectedRow returns a NSIndexPath..

Please help me how can i achieve this.

How to convert NSIndexpath into NSInteger or simply int?

Is it possible to pass an Objective-C block for the `@selector` argument in a `UIButton`?  i.e., Is there any way to get the following to work?

		[closeOverlayButton addTarget:self 
							   action:^ {[anotherIvarLocalToThisMethod removeFromSuperview];} 
					 forControlEvents:UIControlEventTouchUpInside];

Thanks

Can I pass a block as a @selector with Objective-C?

I am going to use `NSHTTPCookieStorage` in an iOS App to manage cookies that are retrieved from a url, and I understand that it will manage cookies during your application&#39;s runtime. However, I was wondering if it&#39;s possible to persist cookies after the application has closed. And then read those cookies again when the app is opened again. Does `NSHTTPCookieStorage` persist cookies between app uses? Or just during the applications runtime? Do I need to use `CoreData` to persist these cookies?`

Persisting Cookies In An iOS Application?

I can create `UIImage` from `NSData` using `[UIImage imageWithData:]` or `[UIImage initWithData:]` methods.   

I wonder if I can get the `NSData` back from an existing `UIImage`?
Something on the line of `NSData *myData = [myImage getData];`

Get underlying NSData from UIImage

I am using MKMapView and have added a number of annotation pins to the map about a 5-10 kilometre area. When I run the application my map starts zoomed out to show the whole world, what is the best way to zoom the map so the pins fit the view?

**EDIT:**
My initial thinking would be to use MKCoordinateRegionMake and calculate the coordinate centre, longitudeDelta and latitudeDelta from my annotations. I am pretty sure this will work, but I just wanted to check I was not missing anything obvious.

Code added, BTW: FGLocation is an class that conforms to `MKAnnotation`, locationFake is an `NSMutableArray` of these objects. Comments are always welcome ....

    - (MKCoordinateRegion)regionFromLocations {
        CLLocationCoordinate2D upper = [[locationFake objectAtIndex:0] coordinate];
        CLLocationCoordinate2D lower = [[locationFake objectAtIndex:0] coordinate];
        
        // FIND LIMITS
        for(FGLocation *eachLocation in locationFake) {
            if([eachLocation coordinate].latitude &gt; upper.latitude) upper.latitude = [eachLocation coordinate].latitude;
            if([eachLocation coordinate].latitude &lt; lower.latitude) lower.latitude = [eachLocation coordinate].latitude;
            if([eachLocation coordinate].longitude &gt; upper.longitude) upper.longitude = [eachLocation coordinate].longitude;
            if([eachLocation coordinate].longitude &lt; lower.longitude) lower.longitude = [eachLocation coordinate].longitude;
        }
        
        // FIND REGION
        MKCoordinateSpan locationSpan;
        locationSpan.latitudeDelta = upper.latitude - lower.latitude;
        locationSpan.longitudeDelta = upper.longitude - lower.longitude;
        CLLocationCoordinate2D locationCenter;
        locationCenter.latitude = (upper.latitude + lower.latitude) / 2;
        locationCenter.longitude = (upper.longitude + lower.longitude) / 2;
    
        MKCoordinateRegion region = MKCoordinateRegionMake(locationCenter, locationSpan);
        return region;
    }




Content Type	Original Author	Original Content on Stackoverflow
Question	Altealice	View Question on Stackoverflow
Solution 1 - Iphone	BoltClock	View Answer on Stackoverflow
Solution 2 - Iphone	Daniele D.	View Answer on Stackoverflow
Solution 3 - Iphone	rsc	View Answer on Stackoverflow
Solution 4 - Iphone	AmyNguyen	View Answer on Stackoverflow

iOS keyboard with "Go" button instead of return

Iphone Problem Overview

Iphone Solutions

Solution 1 - Iphone

Solution 2 - Iphone

Solution 3 - Iphone

Solution 4 - Iphone

Can we see the template instantiated code by C++ compiler

Difference between VARCHAR2(10 CHAR) and NVARCHAR2(10)

Attributions