componentsJoinedByString with AttributedStrings causes NSException - ios

Question

I am getting the following error while joining a array of attributed strings.
2014-12-14 12:57:22.280 Matchismo[57752:60b] -[NSConcreteAttributedString _encodingCantBeStoredInEightBitCFString]: unrecognized selector sent to instance 0x8e81e20
2014-12-14 12:57:22.322 Matchismo[57752:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteAttributedString _encodingCantBeStoredInEightBitCFString]: unrecognized selector sent to instance 0x8e81e20'
*** First throw call stack:
(
0 CoreFoundation 0x017fa1e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x015798e5 objc_exception_throw + 44
2 CoreFoundation 0x01897243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
3 CoreFoundation 0x017ea50b ___forwarding___ + 1019
4 CoreFoundation 0x017ea0ee _CF_forwarding_prep_0 + 14
5 CoreFoundation 0x0177e4e6 CFStringAppend + 566
6 CoreFoundation 0x017ebf04 -[NSArray componentsJoinedByString:] + 532
7 Matchismo 0x00004d59 -[CardGameViewController updateTextLabel] + 345
8 Matchismo 0x00005334 -[CardGameViewController updateUI] + 1396
9 Matchismo 0x00004bdd -[CardGameViewController touchCard:] + 253
10 libobjc.A.dylib 0x0158b880 -[NSObject performSelector:withObject:withObject:] + 77
11 UIKit 0x0023b3b9 -[UIApplication sendAction:to:from:forEvent:] + 108
12 UIKit 0x0023b345 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
13 UIKit 0x0033cbd1 -[UIControl sendAction:to:forEvent:] + 66
14 UIKit 0x0033cfc6 -[UIControl _sendActionsForEvents:withEvent:] + 577
15 UIKit 0x0033c243 -[UIControl touchesEnded:withEvent:] + 641
16 UIKit 0x0027addd -[UIWindow _sendTouchesForEvent:] + 852
17 UIKit 0x0027b9d1 -[UIWindow sendEvent:] + 1117
18 UIKit 0x0024d5f2 -[UIApplication sendEvent:] + 242
19 UIKit 0x00237353 _UIApplicationHandleEventQueue + 11455
20 CoreFoundation 0x0178377f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
21 CoreFoundation 0x0178310b __CFRunLoopDoSources0 + 235
22 CoreFoundation 0x017a01ae __CFRunLoopRun + 910
23 CoreFoundation 0x0179f9d3 CFRunLoopRunSpecific + 467
24 CoreFoundation 0x0179f7eb CFRunLoopRunInMode + 123
25 GraphicsServices 0x037ee5ee GSEventRunModal + 192
26 GraphicsServices 0x037ee42b GSEventRun + 104
27 UIKit 0x00239f9b UIApplicationMain + 1225
28 Matchismo 0x00008d5d main + 141
29 libdyld.dylib 0x01e41701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
Here is my code:
self.textLabel.text = [myArray componentsJoinedByString:#","];
I understand that the attributed strings that have shading and what not cannot be stored in a NSString. What should be the correct code.
Attaching a screenshot of what kind of data the NSAttributed strings hold. They hold the circles/squares/triangles that you see in the image.

Answer 1

If you want to append new string inside attributed string you can directly use appendAttributedString method. But it will always add at the end of attributed string.
If your requirement is to add in the middle of your attributed string and you want to add "," in each word of your attributed string with the shading attributes as well. So in this case you need to first convert your attributed string into string and then you need to store your words in array and then you need to iterate the words from array and convert that string into attributed string with your attributes and then use appendAttributedString with ",". Like that you can implement the same.