Wierd NSArray Error

Question

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What is __NSArrayI and __NSArrayM? How to convert to NSArray?

I am getting the error below

2012-06-06 15:53:19.509 NavApp[5462:707] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[__NSArrayM insertObject:atIndex:]: object cannot be nil' *** First throw call stack: (0x353b788f 0x3775e259 0x3530c1d7 0xba3e5 0xc128b 0x32e2db95 0x32e87d85 0x32e4a251 0x32e49fa1 0x32e49cbb 0x32e49a2f 0x32e00aab 0x32e063d5 0x3220cc2f 0x34246ee7 0x3538a2ad 0x3530d4a5 0x3530d36d 0x36fa9439 0x32e19cd5 0x106a71 0xb8c70) terminate called throwing an exception(lldb)

I think it's odd because it says "__NSArrayM"... Any idea what this means?

You are trying to insert nil into the array, which is not possible. — Daniel, Jun 06 '12 at 20:00
It means the documentation wasn't joking when it said NSArray was a class cluster. — Chuck, Jun 06 '12 at 20:19

score 3 · Accepted Answer · edited Jun 06 '12 at 20:04

3

It seems you are trying to insert a nil object to an NSMutableArray This will cause an exception, since mutable array cannot contain nil objects

About the __NSArrayM

__NSArrayM is a NSMutableArray
__NSArrayI is a NSArray

edited Jun 06 '12 at 20:04

erran

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answered Jun 06 '12 at 19:59

Omar Abdelhafith

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Wierd NSArray Error

1 Answers1