Kindly sort this out , Thanks.
SCENARIO: In SDK-7 On button click I am able to open MFMailComposerVC with its delegate method and all thing works fine. But as I changed simulator to 6.1/6.0 it crashs on button click.
ERROR LOG:
*** Assertion failure in NSDictionary *_UIRecordArgumentOfInvocationAtIndex(NSInvocation *, NSUInteger, BOOL)(), /SourceCache/UIKit/UIKit-2380.17/UIAppearance.m:1118
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Unknown key, "NSColor" in title text attributes dictionary'
SOLUTION: I found and implement solutions of following link and have did some experimental code but always crash, MFMailComposeViewController Crashes because of Global Appearance Properties on iOS6