You need to wrap the CG structures in &lt;code&gt;NSValue&lt;/code&gt; classes. So:

    NSMutableArray* array = [NSMutableArray mutableArray];
    [array addObject:[NSValue valueWithCGRect:CGRectMake(0,0,10,10)]];
    CGRect someRect = [[array objectAtIndex:0] CGRectValue];

    CGRect rect = CGRectMake( 5, 5, 40, 30 );
    NSString* rectAsString = NSStringFromCGRect( rect );
    CGRect original = CGRectFromString( rectAsString );


We store the `CGRect`,`CGPoint`,`CMTime` objects in a `NSMutableArray`,


`[arrayName addObject:[NSValue valueWithCGPoint:MyCGPoint]]`

`[arrayName addObject:[NSValue valueWithCGRect:MyCGRect]]`

`[arrayName addObject:[NSValue valueWithCMTime:MyCMTime]]`

`[arrayName addObject:[NSValue valueWithCMTimeRange:MyCMTimeRange]]`




    Store string in array.and then get back string and convert that in CGRect back as per the need.
    CGRect rect = CGRectMake( 5, 5, 40, 30 );
    NSString* rectAsString = NSStringFromCGRect( rect );
    NSMutableArray* array = [NSMutableArray mutableArray];
    [array addObject:rectAsString];
    
    For converting string in CGRect back use:-
    CGRect rect9 = CGRectFromString(rectAsString);

Is there some way to embed pragma statement in macro with other statements?

I am trying to achieve something like:

    #define DEFINE_DELETE_OBJECT(type)                      \
        void delete_ ## type_(int handle);                  \
        void delete_ ## type(int handle);                                                \
        #pragma weak delete_ ## type_ = delete_ ## type

I am okay with boost solutions (save for wave) if one exists.

Pragma in define macro

What is the difference between an Instance and an Object?
Is there a difference or not?

What is the difference between an Instance and an Object?

How would I store CGRect objects in a NSMutableArray, and then later retrieve them?

How to store CGRect values in NSMutableArray?

<p>How would I store CGRect objects in a NSMutableArray, and then later retrieve them?</p>


I have set up one of my core data attributes as a Boolean.  Now, I need to set it, but XCode keeps telling me that it may not respond to setUseGPS.

    [ride setUseGPS: useGPS.on];

What is the method for setting a boolean in core data?  All my other attributes are set this way, and they work great.  So, not sure why a boolean does not work to be set this way?

iPhone: Save boolean into Core Data

I am developing an application in which I want to change either color or image of `UIPageControl` pagination dots. How can I change it? Is it possible to customize `UIpageControl` on above scenario? 

How can I change the color of pagination dots of UIPageControl?

Is there a way to make a `UIScrollView` auto-adjust to the height (or width) of the content it&#39;s scrolling?

Something like:

    [scrollView setContentSize:(CGSizeMake(320, content.height))];

How do I auto size a UIScrollView to fit its content

This is the iphone site:
http://www.thevisionairegroup.com/projects/accessorizer/site/

After you click &quot;play now&quot; you&#39;ll get to a game. The guns will scroll in. You can scroll the purse and accessories up and down. You can see that when you let go they snap into place. Just as that snap happens, there&#39;s a flicker that occurs. The only webkit animations I&#39;m using are:

    &#39;-webkit-transition&#39;: &#39;none&#39;
    
    &#39;-webkit-transition&#39;: &#39;all 0.2s ease-out&#39;
    
    &#39;-webkit-transform&#39;: &#39;translate(XXpx, XXpx)&#39;

I choose either the first or second transition based on whether or not I want it to animate, and the transform is the only way I move things around.

The biggest issue though is when you click &quot;Match items&quot;, then click &quot;Play again&quot;. You&#39;ll see as the guns animate in, the entire background of the accessories/purses goes white. Can someone please radiate me with some insight asto why this is happening??



iPhone WebKit CSS animations cause flicker

I have made a [custom UISwitch (from this post)][1]. But the problem is, my custom texts are a bit long. Is there any way to resize the switch? [I tried `setBounds`, did not work]

**Edit:**

Here is the code I used:

    @interface CustomUISwitch : UISwitch    
    - (void) setLeftLabelText: (NSString *) labelText;
    - (void) setRightLabelText: (NSString *) labelText;    
    @end

    @implementation CustomUISwitch
    
    - (UIView *) slider 
    { 
    	return [[self subviews] lastObject]; 
    }
    - (UIView *) textHolder 
    { 
    	return [[[self slider] subviews] objectAtIndex:2]; 
    }
    - (UILabel *) leftLabel 
    { 
    	return [[[self textHolder] subviews] objectAtIndex:0]; 
    }
    - (UILabel *) rightLabel 
    { 
    	return [[[self textHolder] subviews] objectAtIndex:1]; 
    }
    - (void) setLeftLabelText: (NSString *) labelText 
    { 
    	[[self leftLabel] setText:labelText]; 
    }
    - (void) setRightLabelText: (NSString *) labelText 
    { 
    	[[self rightLabel] setText:labelText]; 
    }
    @end

	mySwitch = [[CustomUISwitch alloc] initWithFrame:CGRectZero];
	
    //Tried these, but did not work
	//CGRect aFrame = mySwitch.frame;
	//aFrame.size.width = 200;
	//aFrame.size.height = 100;
	//mySwitch.frame = aFrame;

	[mySwitch setLeftLabelText: @&quot;longValue1&quot;];
	[mySwitch setRightLabelText: @&quot;longValue2&quot;];


  [1]: https://stackoverflow.com/questions/694848/custom-uiswitch-app-store-approval

How to resize a UISwitch?

I have tried to initialize my NSMutableArray 100 ways from Sunday, and NOTHING is working for me. I tried setting it equal to a newly allocated and initialized NSMutableArray, just allocating, initializing the variable by itself, every combination I could think of and always the same result.

Here&#39;s the code:

Object.h
    
    NSMutableArray *array;
    
    @property (copy) NSMutableArray *array;

Object.m

    @synthesize array;
    
    if ( self.array ) {
        [self.array addObject:anObject];
    }
    else {
        self.array = [NSMutableArray arrayWithObjects:anObject, nil];
    }

NOTE: In debug &quot;anObject&quot; is NOT nil at time of execution...

I have tested anObject and it isThe initialization works just fine, but I keep getting the error below when I try to addObject: to self.array.

&gt; 2010-07-10 11:52:55.499 MyApp[4347:1807] -[__NSArrayI addObject:]: unrecognized selector sent to instance 0x184480
&gt;
&gt; 2010-07-10 11:52:55.508 MyApp[4347:1807] *** Terminating app due to uncaught exception
&gt; &#39;NSInvalidArgumentException&#39;, reason: &#39;-[__NSArrayI addObject:]: unrecognized selector sent to instance 0x184480&#39;

Does anyone have any idea what&#39;s going wrong?

NSMutableArray addObject: -[__NSArrayI addObject:]: unrecognized selector sent to instance

I&#39;m able to put the contents of an `NSSet` into an `NSMutableArray` like this:

    NSMutableArray *array = [set allObjects];

The compiler complains though because [set allObjects] returns an `NSArray` not an `NSMutableArray`. How should this be fixed?

How to return an NSMutableArray from an NSSet

Are there any special methods to make swapping elements in an NSMutableArray easier or more direct?

Swapping elements in an NSMutableArray

How can an object be added at a specific index of an `NSMutableArray`?

How is an object added to the front of the array?

Adding an object at a specific index of an NSMutableArray

Is there a way to force NSMutableArray to hold one specific object type only?

I have classes definitions as follow:  

    @interface Wheel:NSObject  
    {    
      int size;  
      float diameter;  
    }  
    @end  
    
      
    @interface Car:NSObject  
    {  
       NSString *model;  
       NSString *make;  
       NSMutableArray *wheels;  
    }  
    @end

How can I force **wheels** array to hold **Wheel** objects only with code? (and absolutely not other objects)

NSMutableArray - force the array to hold specific object type only

I have a `UIScrollView` decendent that implements a takeScreenshot method that looks like this:


    -(void)takeScreenshot {  
      CGRect contextRect  = CGRectMake(0, 0, 768, 1004);
      UIGraphicsBeginImageContext(contextRect.size);	
      [self.layer renderInContext:UIGraphicsGetCurrentContext()];
      UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
      UIGraphicsEndImageContext();
      
      // do something with the viewImage here.
    }

This basically moves to the top of the scroll view, and takes a screenshot of the visible area. It works fine when the iPad is oriented portrait, but when it&#39;s in landscape the bottom of the image is cut off (as the height of the visible area is only 748, not 1004).

Is it possible to get a snapshot of the `UIScrollView`, including areas not on screen? Or do I need to scroll the view down, take a second photo and stitch them together?

Getting a screenshot of a UIScrollView, including offscreen parts

I have the following CALayer:

    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = CGRectMake(8, 57, 296, 30);
    gradient.cornerRadius = 3.0f;
    gradient.colors = [NSArray arrayWithObjects:(id)[RGB(130, 0, 140) CGColor], (id)[RGB(108, 0, 120) CGColor], nil];
    [self.layer insertSublayer:gradient atIndex:0];

I&#39;d like to add an **inner shadow** effect to it, but I am not quite sure how to do this. I suppose I would be required to draw in drawRect, however this would add the layer on top of other UIView objects, since it&#39;s supposed to be a bar behind some buttons, so I am at a loss as to what to do?

I could add another layer, but again, not sure how to achieve the inner shadow effect (like this:

![enter image description here][1]

Help appreciated...


  [1]: http://i.stack.imgur.com/MTFCR.png

Inner shadow effect on UIView layer?

I&#39;m confusing `CGLayer` and `CALayer`. They look similar, so why are there separate implementations? What&#39;s the difference between, and compatibility of, `CGLayer` and `CALayer`?

What&#39;s the difference and compatibility of CGLayer and CALayer?

I&#39;m using the new ImageIO framework in iOS 4.1. I successfully retrieve the exif metadata using the following:

    CFDictionaryRef metadataDict = CMGetAttachment(sampleBuffer, kCGImagePropertyExifDictionary , NULL);

Reading it out, it appears valid. Saving an image out works, but there is never any exif data in the image.

        CGImageDestinationRef myImageDest = CGImageDestinationCreateWithURL((CFURLRef) docurl, kUTTypeJPEG, 1, NULL);
        
        // Add the image to the destination using previously saved options. 
        CGImageDestinationAddImage(myImageDest, iref, NULL);
        
        //add back exif
        NSDictionary *props = [NSDictionary dictionaryWithObjectsAndKeys:
                                [NSNumber numberWithFloat:.1], kCGImageDestinationLossyCompressionQuality,
                               metadataDict, kCGImagePropertyExifDictionary, //the exif metadata
                                                            nil];
                               
                              //kCGImagePropertyExifAuxDictionary
        
        CGImageDestinationSetProperties(myImageDest, (CFDictionaryRef) props);
        
        // Finalize the image destination. 
        bool status = CGImageDestinationFinalize(myImageDest);



Problem setting exif data for an image

There are a lot of resources about how to display a PDF in an App&#39;s `UIView`. What I am working on now is to create a PDF from `UIViews`. 

For example, I have a `UIView`, with subviews like Textviews, `UILabels`, `UIImages`, so how can I convert a **big** `UIView` as a whole including all its subviews and subsubviews to a PDF?

I have checked [Apple&#39;s iOS reference](https://developer.apple.com/library/archive/documentation/2DDrawing/Conceptual/DrawingPrintingiOS/GeneratingPDF/GeneratingPDF.html). However, it only talks about writing pieces of text/image to a PDF file.

The problem I am facing is that the content I want to write to a file as PDF is a lot. If I write them to the PDF piece by piece, it is going to be huge work to do.
That&#39;s why I am looking for a way to write `UIViews` to PDFs or even bitmaps.

I have tried the source code I copied from other Q/A within Stack Overflow. But it only gives me a blank PDF with the `UIView` bounds size.

    -(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
    {
        // Creates a mutable data object for updating with binary data, like a byte array
        NSMutableData *pdfData = [NSMutableData data];
    	
        // Points the pdf converter to the mutable data object and to the UIView to be converted
        UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
        UIGraphicsBeginPDFPage();
    	
        // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
        [aView drawRect:aView.bounds];
    	
        // remove PDF rendering context
        UIGraphicsEndPDFContext();
    	
        // Retrieves the document directories from the iOS device
        NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
    	
        NSString* documentDirectory = [documentDirectories objectAtIndex:0];
        NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];
    	
        // instructs the mutable data object to write its context to a file on disk
        [pdfData writeToFile:documentDirectoryFilename atomically:YES];
        NSLog(@&quot;documentDirectoryFileName: %@&quot;,documentDirectoryFilename);
    }


Content Type	Original Author	Original Content on Stackoverflow
Question	Krishna Chaitanya Bandaru	View Question on Stackoverflow
Solution 1 - Iphone	Jason Coco	View Answer on Stackoverflow
Solution 2 - Iphone	Jane	View Answer on Stackoverflow
Solution 3 - Iphone	Vaibhav Sharma	View Answer on Stackoverflow
Solution 4 - Iphone	Tanvi Jain	View Answer on Stackoverflow

How to store CGRect values in NSMutableArray?

Iphone Problem Overview

Iphone Solutions

Solution 1 - Iphone

Solution 2 - Iphone

Solution 3 - Iphone

Solution 4 - Iphone

What is the difference between an Instance and an Object?

Pragma in define macro

Attributions