Please set this...

     editButton.userInteractionEnabled = NO; 

or You can use 

     editButton.enabled = NO;



# Swift 3 and above

`editButton.isEnabled = false`

`setEnabled` is now part of the setter method for `isEnabled`.

setter for property **enabled** is overridden in class **UIButton.** try to send a message.

     [editbutton setEnabled:NO];

Use the `enabled` property of `UIControl` which the super class of `UIButton` and set it with NO.

**myButton.enabled = NO;**


You could also try as **@Marvin** suggested,
In that case your button will not respond to any touch event from user,

In addition to the above:

Set
`editButton.userInteractionEnabled = NO;`
or you can use
`editButton.enabled = NO;`

You might want to gray out the button so the user knows it was disabled:
`editButton.alpha = 0.66`



 

    yourBtn.userInteractionEnabled = NO; 



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Method to dynamically load java class files

I&#39;m running a webapp in Spring Web MVC 3.0 and I have a number of controller methods whose signatures are roughly as follows:

    @RequestMapping(value = &quot;/{level1}/{level2}/foo&quot;, method = RequestMethod.POST)
    public ModelAndView createFoo(@PathVariable long level1,
            @PathVariable long level2,
            @RequestParam(&quot;foo_name&quot;) String fooname,
            @RequestParam(value = &quot;description&quot;, required = false) String description);


I&#39;d like to add some validation - for example, `description` should be limited to a certain length or `fooname` should only contain certain characters. If this validation fails, I want to return a message to the user rather than just throw some unchecked exception (which would happen anyway if I let the data percolate down to the DAO layer). I&#39;m aware of JSR303 but have not worked with it and don&#39;t quite understand how to apply it in a Spring context.

From what I understand, another option would be to bind the `@RequestBody` to an entire domain object and add validation constraints there, but currently my code is set up to accept individual parameters as shown above.

What is the most straightforward way to apply validation to input parameters using this approach?

Spring Web MVC - validate individual request params

I am working on a project in which I have to show all photos of Photo Library in a plist and show them horizontally on `UIButton`s. 

My app will also have an edit button: when the user clicks this button, a delete mark (such as usually appears in other iPhone/iPad apps) should show on each button. 

But here&#39;s the crucial bit: as soon as this delete mark appears, the functionality of the button should be disabled. I&#39;ve tried accomplishing this with the following:

    {
      editbutton.enabled=NO;
    }

 
...but it neither produces an error nor works. What should I do?


How do I disable a UIButton?

I am working on a project in which I have to show all photos of Photo Library in a plist and show them horizontally on <code>UIButton</code>s.
My app will also have an edit button: when the user clicks this button, a delete mark (such as usually appears in other iPhone/iPad apps) should show on each button.
But here's the crucial bit: as soon as this delete mark appears, the functionality of the button should be disabled. I've tried accomplishing this with the following:
<pre><code class="hljs language-ini">{
 editbutton.enabled=NO;
}
</code></pre>
...but it neither produces an error nor works. What should I do?

Is there any way to add spacing between `UITableViewCell`?

I have created a table and each cell only contain an image. The image is assigned to the cell like this:

    cell.imageView.image = [myImages objectAtIndex:indexPath.row];

but this make the image enlarged and fit into the whole cell, and there are no spacing between the images.

Or lets say in this way, the height of image are e.g. 50, and I want to add 20 spacing between the images. Is there any way to accomplish this?

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&gt; **Possible Duplicates:**  
&gt; [Objective-C - float checking for nan](https://stackoverflow.com/questions/3471988/objective-c-float-checking-for-nan)  
&gt; [Determine if NSNumber is NaN](https://stackoverflow.com/questions/719417/determine-if-nsnumber-is-nan)  

&lt;!-- End of automatically inserted text --&gt;

I have a problem with NaN values in CGFloat, how can I check if the number is valid?

the only way so far that works is:

    if ([[NSString stringWithFormat:@&quot;%f&quot;, output] isEqualToString:@&quot;nan&quot;]) {
	    output = 0;
    }

which is not a nice solution at all! :) ... and I am pretty sure that there is something else I should do instead.


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The Security services API doesn&#39;t appear to allow me to compute a hash directly. There are plenty of public domain and liberally licensed versions available, but I&#39;d rather use a system library implementation if possible.

The data is accessible via NSData, or plain pointers.

The cryptographic strength of the hash is important to me. SHA-256 is the minimum acceptable hash size.

How can I compute a SHA-2 (ideally SHA 256 or SHA 512) hash in iOS?

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I would like to manually check if there are new updates for my app while the user is in it, and prompt him to download the new version. Can I do this by checking the version of my app in the app store - programatically?



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I want to use a selector on an NSObject instance *without* the need for an implemented protocol. For example, there&#39;s a category method that should set an error property if the NSObject instance it&#39;s called on supports it. This is the code, and the code works as intended:

    if ([self respondsToSelector:@selector(setError:)])
    {
        [self performSelector:@selector(setError:) withObject:[NSError errorWithDomain:@&quot;SomeDomain&quot; code:1 userInfo:nil]];
    }

However, the compiler doesn&#39;t see any method around with the setError: signature, so it gives me a warning, for each line that contains the `@selector(setError:)` snippet:

    Undeclared selector &#39;setError:&#39;

I don&#39;t want to have to declare a protocol to get rid of this warning, because I don&#39;t want all classes that may use this to implement anything special. Just by convention I want them to have a `setError:` method or property.

Is this doable? How?

Cheers,  
EP

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I am quite new to xcode and objective-c. I want to ask a very basic question.

I saw that when &quot;linking binary to libraries&quot; in project settings, there are differences about framework and libraries, imported from other projects in workspace.

First question, why is there a framework? And why is there a library? Cannot my library be a framework?

And then, from a *.h* file, how can I call classes from my imported static library?

I suppose there must be a prefix, but I couldn&#39;t find it.
Neither &lt;ProjName/Myclass.h&gt; nor &quot;ProjName/Myclass.h&quot; are working.

Please, be as specific as you can.

Thanks

Difference between framework and static library in xcode4, and how to call them

I am currently receiving a string like this:

    @&quot;Sam|26,Hannah|22,Adam|30,Carlie|32,Jan|54&quot;

And I am splitting it like this:

    testArray = [[NSArray alloc] init];
    NSString *testString = [[NSString alloc] initWithFormat:@&quot;Sam|26,Hannah|22,Adam|30,Carlie|32,Jan|54,Steve|56,Matty|24,Bill|30,Rob|30,Jason|33,Mark|22,Stuart|54,Kevin|30&quot;];
    testArray = [testString componentsSeparatedByString:@&quot;,&quot;];
    	
    dict = [NSMutableDictionary dictionary];
    for (NSString *s in testArray) {
    		
        testArray2 = [s componentsSeparatedByString:@&quot;|&quot;];
        [dict setObject:[testArray2 objectAtIndex:1] forKey:[testArray2 objectAtIndex:0]];
    }

I will now be receiving a string like this:

    @&quot;Sam|26|Developer,Hannah|22|Team Leader,Adam|30|Director,Carlie|32|PA,Jan|54|Cleaner&quot;

Can I (and how) use the same method as above to separate the string more than once using the &quot;|&quot; separator?

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This should be simple enough. 

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I&#39;m creating a colored image like this:

    CGRect rect = CGRectMake(0, 0, 1, 1);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context,
                                       [[UIColor redColor] CGColor]);
    //  [[UIColor colorWithRed:222./255 green:227./255 blue: 229./255 alpha:1] CGColor]) ;
    CGContextFillRect(context, rect);
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

and then use it as the background image of a button:

    [resultButton setBackgroundImage:img forState:UIControlStateNormal];

This works great using the redColor, however I want to use an RGB color (as shown in the commented line). When I use the RGB color, the buttons background isn&#39;t changed.

What am I missing?

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I&#39;m setting text color for `UIButton`


    headingButton.titleLabel.textColor = [UIColor colorWithRed:36/255.0 
                                                         green:71/255.0 
                                                          blue:113/255.0 
                                                         alpha:1.0];


It&#39;s not changing color same code I&#39;m using in another code it&#39;s working.

UIButton title text color

I don&#39;t want to use a subview if I can avoid it. I want a `UIButton` with a background image, text, and an image in it. Right now, when I do that, the image is on the left side of the text. The background image, text, and image all have different highlight states.

How do I put the image on the right side of the text in a UIButton?

I&#39;m trying to make a `UIButton` that has two lines of text in its titleLabel. This is the code I&#39;m using:
    
    UIButton *titleButton = [[UIButton alloc] initWithFrame:CGRectMake(15, 10, frame.size.width-100, 100)];
    titleButton.titleLabel.font = [UIFont boldSystemFontOfSize:24.0];
    [titleButton setTitle:@&quot;This text is very long and should get truncated at the end of the second line&quot; forState:UIControlStateNormal];
    titleButton.titleLabel.lineBreakMode = UILineBreakModeTailTruncation;
    titleButton.titleLabel.numberOfLines = 2;
    [self addSubview:titleButton];

When I try this, the text only appears on one line. It seems the only way to achieve more than one line of text in `UIButton.titleLabel` is to set `numberOfLines=0` and use `UILineBreakModeWordWrap`. But this doesn&#39;t guarantee the text to be exactly two lines.

Using a plain `UILabel`, however, does work:

    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 10, frame.size.width-100, 100)];
    titleLabel.font = [UIFont boldSystemFontOfSize:24.0];
    titleLabel.text = @&quot;This text is very long and should get truncated at the end of the second line&quot;;
    titleLabel.numberOfLines = 2;
    titleLabel.lineBreakMode = UILineBreakModeTailTruncation;
    [self addSubview:titleLabel];

        

Does anyone know how to make the `UIButton` work with two lines? Is the only solution to create a separate `UILabel` to hold the text, and add it as a subview of the button?



Content Type	Original Author	Original Content on Stackoverflow
Question	Rahul	View Question on Stackoverflow
Solution 1 - Ios	Mehul Mistri	View Answer on Stackoverflow
Solution 2 - Ios	Schemetrical	View Answer on Stackoverflow
Solution 3 - Ios	spjatkin	View Answer on Stackoverflow
Solution 4 - Ios	Jhaliya - Praveen Sharma	View Answer on Stackoverflow
Solution 5 - Ios	Patrick Domegan	View Answer on Stackoverflow
Solution 6 - Ios	Pradumna Patil	View Answer on Stackoverflow

How do I disable a UIButton?

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Solution 2 - Ios

Swift 3 and above

Solution 3 - Ios

Solution 4 - Ios

Solution 5 - Ios

Solution 6 - Ios

Spring Web MVC - validate individual request params

Method to dynamically load java class files

Attributions