在iOS7中在UINavigationBar下添加视图的最佳方法是什么

Question

On ios7, a lot of apps (Apple Messages, Facebook Messenger, Calendar)have views appearing under the UINavigationBar, often with what seems to be standard animation. As it seems quite standard and looks a lot with a UIToolBar, I was looking for the standard way of implementing it but couldn't find anything.

Is there a better way to adding a UIToolBar to the UINavigationBar?

Answer 1

You should follow this simple approach.

• Add a UIToolBar like this.

   UIBarButtonItem *flexiableItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil]; UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:nil]; UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil]; NSArray *items = [NSArray arrayWithObjects:item1, flexiableItem, item2, nil]; self.toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, -44, self.view.frame.size.width, 44)]; [self.toolBar setItems:items]; self.toolBar.tintColor = [UIColor whiteColor]; self.toolBar.barTintColor = [UIColor colorWithRed:0.6 green:0.1 blue:0.2 alpha:1]; [self.contentView addSubview:self.toolBar]; 

• Add a Menu Button on Top navigation item

   self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Menu" style:UIBarButtonItemStyleBordered target:self action:@selector(toggleMenu:)]; 

• Now Implement toggleMenu function. Add a BOOL variable to track the movement.

   if(!moved) { [UIView animateWithDuration:0.5 animations:^{ self.toolBar.alpha = 1; self.toolBar.frame = CGRectMake(0, 0, self.view.frame.size.width, 44); }]; moved = YES; }else { [UIView animateWithDuration:0.5 animations:^{ self.toolBar.alpha = 1; self.toolBar.frame = CGRectMake(0, -44, self.view.frame.size.width, 44); }]; moved = NO; } 

• Here is the attached video for this.

Hope that helps.