There is no such tools for converting Swift code to Objective-C. There are some reasons. One is because Objective-C is a semantic subset of Swift, i. e. Objective-C doesn&#39;t have any equivalent of some fundamental features of Swift such as [Generics][1], [Algebraic data types][2], [Pattern matching][3] and other. Theoretically it is possible to make, but generated Objective-C code should be boilerplate and inefficient.

It is recommended to migrate your codebase to Swift to avoid technical debt there are many tools which can be used to [convert Objective-C to Swift][4].


  [1]: https://en.wikipedia.org/wiki/Generic
  [2]: https://en.wikipedia.org/wiki/Algebraic_data_type
  [3]: https://en.wikipedia.org/wiki/Pattern_matching
  [4]: https://www.xspdf.com/resolution/52916558.html

I am using Workbench version 6.3.5 Community and this is GUI question only.

When creating a new table auto increment check-box is disabled.  
Is it a bug or I need to enable this some how in options?  
And how to set start value and step for auto increment in GUI when creating a table?

[![workbench][1]][1]


  [1]: http://i.stack.imgur.com/jIPOX.png

MySQL Workbench auto increment disabled

Recently I&#39;ve been getting the error: &quot;Could not find Developer Disk Image&quot;
 
I think this happens since I have updated iOS to 9.1 on the iPhone.
How can I fix the problem and make Xcode support iOS 9.1 devices?


&quot;Could not find Developer Disk Image&quot;

I know most of the questions are about converting from objective-c to swift, but I&#39;m looking for a tool that can convert a swift code to objective-c. When searching all I find is objective-c to swift.

**Yes - I know I can put swift code inside objective-c project with a bridge-header - that&#39;s not what I&#39;m looking for.**

I need a tool that converts swift code to objective-c code. Is there such thing?


Tool to convert from Swift to objective-c

I know most of the questions are about converting from objective-c to swift, but I'm looking for a tool that can convert a swift code to objective-c. When searching all I find is objective-c to swift.
Yes - I know I can put swift code inside objective-c project with a bridge-header - that's not what I'm looking for.
I need a tool that converts swift code to objective-c code. Is there such thing?

I created a completely new, single-view iOS universal Swift app. Then, I unchecked &quot;Landscape Left&quot; and &quot;Landscape Right&quot; in the app settings. I ran it on my iPhone, and hooray, it stays in portrait mode no matter how I rotate my phone. Then I ran it on my iPad, and it rotates to anything. Even upside-down portrait mode, which wasn&#39;t enabled in the first place? Am I the only experiencing this? This happens in the iPad simulator as well when I rotate with command+arrow key. 

I also tried adding the following to ViewController.swift, and got the same result.
    
    override func shouldAutorotate() -&gt; Bool {
        return false
    }
    
    override func supportedInterfaceOrientations() -&gt; UIInterfaceOrientationMask {
        return UIInterfaceOrientationMask.Portrait
    }

Is there no way to actually disable rotating away from portrait on iPad?

How do I disable landscape-orientation on an iPad app?

I&#39;m trying to get the first and last day of the month in swift.

So far I have the following:

    let dateFormatter = NSDateFormatter()
    let date = NSDate()
    dateFormatter.dateFormat = &quot;yyyy-MM-dd&quot;
    let calendar = NSCalendar.currentCalendar()
    let components = calendar.components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: date)
 
    let month = components.month
    let year = components.year
            
    let startOfMonth = (&quot;\(year)-\(month)-01&quot;)

But I&#39;m not sure how to get the last date. Is there a built in method I&#39;m missing? Obviously it has to take into account leap years etc.

first and last day of the current month in swift

I would like to ask how react native handle or do the responsive font. For example in iphone 4s i Have fontSize: 14, while in iphone 6 I have fontSize: 18.

React Native Responsive Font Size

I would like to make a UILabel clickable.

I have tried this, but it doesn&#39;t work:

    class DetailViewController: UIViewController {
    
        @IBOutlet weak var tripDetails: UILabel!
    
        override func viewDidLoad() {
            super.viewDidLoad()
            ...
            let tap = UITapGestureRecognizer(target: self, action: Selector(&quot;tapFunction:&quot;))
            tripDetails.addGestureRecognizer(tap)
        }
        
        func tapFunction(sender:UITapGestureRecognizer) {
            print(&quot;tap working&quot;)
        }
    }

How to make a UILabel clickable?

I have a `UITableView` that is populated with cells with dynamic height. I would like the table to scroll to the bottom when the view controller is pushed from view controller.

I have tried with `contentOffset` and `tableView scrollToRowAtIndexPath` but still I am not getting the perfect solution for exactly I want.

Can anyone please help me fix this issue?

Here is my code to scroll:

 
    let indexPath = NSIndexPath(forRow: commentArray.count-1, inSection: 0)
    tableView.scrollToRowAtIndexPath(indexPath, atScrollPosition: .Bottom, animated: true)


How to scroll to the exact end of the UITableView?

I know some people have asked this question before but they were all about `UITableViews` or `UIScrollViews` and I couldn&#39;t get the accepted solution to work for me. What I would like is the snapping effect when scrolling through my `UICollectionView` horizontally - much like what happens in the iOS AppStore. iOS 9+ is my target build so please look at the UIKit changes before answering this.

Thanks.

Snap to center of a cell when scrolling UICollectionView horizontally

I want to add text input in alert-view of ios 8.
I know it was done using `UIAlertController` but not have any idea.
How to do it ? 

How to add text input in alertview of ios 8?

What is wrong with the below code

    -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
        
        NSString *CellIdentifier  = @&quot;Cell&quot;;
    
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
        
        cell.textLabel.text = @&quot;hello&quot;;
        
        return cell;
    }
And   

    -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
        return 2;
    }
but I&#39;m getting **failed to obtain a cell from its dataSource**

The entire exception is 

    *** Terminating app due to uncaught exception &#39;NSInternalInconsistencyException&#39;, reason: &#39;UITableView (&lt;UITableView: 0x7ffe0b092800; frame = (0 97; 414 590); clipsToBounds = YES; autoresize = RM+BM; gestureRecognizers = &lt;NSArray: 0x7ffe0acf3b10&gt;; layer = &lt;CALayer: 0x7ffe0aceb6e0&gt;; contentOffset: {0, 0}; contentSize: {414, 88}&gt;) failed to obtain a cell from its dataSource (&lt;AllContactsViewController: 0x7ffe0ace60f0&gt;)&#39;


I have set delegate and data source for the table view

Failed to obtain a cell from its DataSource

I want to realize a function about changing password. It requires users to input their previous password in an alert dialog.

I want to click the button &quot;Confirm the modification&quot; then jump to the other view controller for changing password. I have written some code, but I don&#39;t know how to write in the next moment.

```
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@&quot;Change password&quot; message:@&quot;Please input your previous password&quot; preferredStyle:UIAlertControllerStyleAlert];

[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
	textField.placeholder = @&quot;please input your previous password&quot;;
	textField.secureTextEntry = YES;
}];

UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@&quot;cancel&quot; style:UIAlertActionStyleCancel handlers:nil];

UIAlertAction *okAction = [UIAlertAction actionWithTitle:@&quot;Confirm the modification&quot; style:UIAlertActionStyleDestructive handler:*(UIAlertAction *alertAction) {
	if (condition) {
		statements
	}
}];

[alertController addAction:cancelAction];
[alertController addAction:okAction];
[self presentViewController:alertController animated:YES completion:nil];
```

[![enter image description here][2]][2]

  [1]: http://i.stack.imgur.com/LwpuY.png
  [2]: http://i.stack.imgur.com/C0IEe.png

How to add textField in UIAlertController?

This is a switch statement that I am getting errors on:

            switch (transaction.transactionState) {
                
            case SKPaymentTransactionStatePurchasing:
                
                // show wait view here
                statusLabel.text = @&quot;Processing...&quot;;
                break;
                
            case SKPaymentTransactionStatePurchased:
                
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                
                // remove wait view and unlock iClooud Syncing
                statusLabel.text = @&quot;Done!&quot;;
                
                NSError *error = nil;
                [SFHFKeychainUtils storeUsername:@&quot;IAPNoob01&quot; andPassword:@&quot;whatever&quot; forServiceName: kStoredData updateExisting:YES error:&amp;error];
                
                // apply purchase action  - hide lock overlay and
                [oStockLock setBackgroundImage:nil forState:UIControlStateNormal];
                
                // do other thing to enable the features
                
                break;
                
            case SKPaymentTransactionStateRestored:
                
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                // remove wait view here
                statusLabel.text = @&quot;&quot;;
                break;
                
            case SKPaymentTransactionStateFailed:
                
                if (transaction.error.code != SKErrorPaymentCancelled) {
                    NSLog(@&quot;Error payment cancelled&quot;);
                }
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                // remove wait view here
                statusLabel.text = @&quot;Purchase Error!&quot;;
                break;
                
            default:
                break;
        }

The last two cases, plus the default, are giving me the following error:

&gt;  Cannot jump from switch statement to this case label

I have used the switch statement many, many times; this is the first time I have seen this.   The code has been copied from a tutorial ([here][1]), which I am trying to adapt for my app.  Would appreciate the help on this one.  SD


  [1]: http://xcodenoobies.blogspot.com/2012/04/implementing-inapp-purchase-in-xcode.html

What is causing this: Cannot jump from switch statement to this case label

    
I have the following function working as I expect, in iOS 8:
    
    func showConfirmBox(msg:String, title:String,
        firstBtnStr:String,
        secondBtnStr:String,
        caller:UIViewController) {
            let userPopUp = UIAlertController(title:title,
                message:msg, preferredStyle:UIAlertControllerStyle.Alert)
            userPopUp.addAction(UIAlertAction(title:firstBtnStr, style:UIAlertActionStyle.Default,
                handler:{action in}))
            userPopUp.addAction(UIAlertAction(title:secondBtnStr, style:UIAlertActionStyle.Default,
                handler:{action in}))
            caller.presentViewController(userPopUp, animated: true, completion: nil)
    }
    
I would like to make something like the following, in order to pass as arguments the methods to be executed when one or the other of the buttons are going to be touched:
    
    
    func showConfirmBox(msg:String, title:String,
        firstBtnStr:String, firstSelector:Selector,
        secondBtnStr:String, secondSelector:Selector,
        caller:UIViewController) {
            let userPopUp = UIAlertController(title:title,
                message:msg, preferredStyle:UIAlertControllerStyle.Alert)
            userPopUp.addAction(UIAlertAction(title:firstBtnStr, style:UIAlertActionStyle.Default,
                handler:{action in caller.firstSelector()}))
            userPopUp.addAction(UIAlertAction(title:secondBtnStr, style:UIAlertActionStyle.Default,
                handler:{action in caller.secondSelector()}))
            caller.presentViewController(userPopUp, animated: true, completion: nil)
    }
    
Obviously I am not doing the right thing with firstSelector and secondSelector, because what I have tried up to now did not work. I suppose I am not using the right syntax for what I want, but I am sure it is possible to do what I would like to do. Any idea of the way to do it properly?
    


Content Type	Original Author	Original Content on Stackoverflow
Question	developer82	View Question on Stackoverflow
Solution 1 - Ios	imnosov	View Answer on Stackoverflow

Tool to convert from Swift to objective-c

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

"Could not find Developer Disk Image"

MySQL Workbench auto increment disabled

Attributions