I am calling the -(void)setEditing:(BOOL)editing animated:(BOOL)animated method in my code to swap between two buttons on the RHS of my navigation bar.
我在我的代码中调用 - （void）setEditing：（BOOL）编辑动画：（BOOL）动画方法，以便在导航栏的RHS上的两个按钮之间进行交换。
-(void)setEditing:(BOOL)editing animated:(BOOL)animated {
[super setEditing:editing animated:animated];
// Toggle ‘+’ and ‘Add To Order’ button.
if( editing ) {
self.navigationItem.rightBarButtonItem = self.addItemButton;
}
else {
self.navigationItem.rightBarButtonItem = self.addToOrderButton;
}
}
Where self.addItemButton and self.addToOrderButton are ivars containing predefined UIBarButtonItems, setup in awakefromNib.
self.addItemButton和self.addToOrderButton是包含预定义UIBarButtonItems的ivars，在awakefromNib中设置。
The button in self.addToOrderButton is significantly wider then the one in self.addItemButton, so I’d like their to be a subtle animation between the two widths when the change in editing state is triggered (by tapping a standard editButtonItem on the LHS of the navigation.
self.addToOrderButton中的按钮比self.addItemButton中的按钮宽得多，因此当触发编辑状态的更改时（通过点击LHS上的标准editButtonItem），我希望它们是两个宽度之间的微妙动画。导航。
If I surround the whole if:else with [UIView beginAnimations:nil context:NULL]; and [UIView commitAnimations]; the button change does animate, but with their positions—flying into place individually from the top left—rather than in place and just animating their widths.
如果我用[UIView beginAnimations：nil context：NULL]包围整个if：else;和[UIView commitAnimations];按钮的变化会产生动画效果，但是它们的位置会从左上角单独飞行到位，而不是就位，只是动画它们的宽度。
How I animate the navigation bar elements so that each individual one (the RHS button, the title) animate in more appropriate, restrained ways?
我如何设置导航栏元素的动画，以便每个人（RHS按钮，标题）以更恰当，更有限的方式制作动画？
1 个解决方案
#1
71
self.navigationItem.rightBarButtonItem = self.addToOrderButton;
There are specific methods you can use to animate the right and left bar button items:
您可以使用特定方法为右侧和左侧条形按钮项设置动画：
[self.navigationItem setRightBarButtonItem: self.addToOrderButton animated:YES];
...which will animate it for you. If you need everything to animate (including the title) you can also use the setItems:animated: method of your navigation bar (pass it in an array of the navigation items you'd like to display)
...它会为你制作动画。如果您需要动画的所有内容（包括标题），您还可以使用导航栏的setItems：animated：方法（将其传递给您要显示的导航项目数组）
#1
71
self.navigationItem.rightBarButtonItem = self.addToOrderButton;
There are specific methods you can use to animate the right and left bar button items:
您可以使用特定方法为右侧和左侧条形按钮项设置动画：
[self.navigationItem setRightBarButtonItem: self.addToOrderButton animated:YES];
...which will animate it for you. If you need everything to animate (including the title) you can also use the setItems:animated: method of your navigation bar (pass it in an array of the navigation items you'd like to display)
...它会为你制作动画。如果您需要动画的所有内容（包括标题），您还可以使用导航栏的setItems：animated：方法（将其传递给您要显示的导航项目数组）