1 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 2 { 3     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 4     if (self) 5     { 6          7         self.navigationItem.title = @"我收藏的优惠券"; 8         self.editButtonItem.possibleTitles = [NSSet setWithObjects:@"编辑", @"完成", nil]; 9         self.navigationItem.rightBarButtonItem = self.editButtonItem;10         self.editButtonItem.title = @"编辑";11         12     }13     return self;14 }15 //设置可以编辑；16 -(void)setEditing:(BOOL)editing animated:(BOOL)animated17 {18     19     [super setEditing:editing animated:animated];20     if (self.editing) {21         self.editButtonItem.title = @"完成";22     }23     else {24         self.editButtonItem.title = @"编辑";25     }26     [discountTableView setEditing:editing animated:animated];27     28 }