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Adlai-Holler/gist:9084922

Created February 19, 2014 02:21
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gistfile1.m
@implementation UINavigationController(Trim)
-(void)trimNavigationStack {
NSArray *vcs = [self.viewControllers subArrayWithRange:NSMakeRange(0,self.viewControllers.count - 1)];
NSString *file = [NSTemporaryDirectory() stringByAppendingPathComponent:@"trimmedVCs"];
[NSKeyedArchiver archiveRootObject:vcs toFile:file];
[self setViewControllers:@[self.viewControllers.lastObject] animated:NO];
}
-(void)untrimNavigationStack {
NSString *file = [NSTemporaryDirectory() stringByAppendingPathComponent:@"trimmedVCs"];
NSArray *unpacked = [NSKeyedUnarchiver unarchiveObjectWithFile:file];
NSArray *newVCs = [unpacked arrayByAddingObjectsFromArray:self.viewControllers];
[self setViewControllers:newVCs animated:NO];
}
@end
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