如何使导航栏像iPhone中的照片应用程序一样透明和淡出
问题描述：
我是iPhone编程的新手......任何人都可以帮我解决..
i am new to iPhone Programming ...can anybody help me out please..
我想在iPhone中开发像照片应用程序这样的应用程序..
i want to develop an app like photo app in iPhone..
如何使iPhone中的照片应用程序中的naveigation栏和工具栏透明和淡出
How to make the naveigation bar and toolbar transparent and fadeout like in photo app in iPhone
谢谢你..
答
UINavigationBar 继承自 UIView ，所以你可以使用 UIView 的动画方法通过设置 alpha 属性来淡出它这应该有效：
UINavigationBar inherits from UIView, so you can use UIView's animation methods to fade it out by setting the alpha property to 0. This should work:
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
[navigationBar setAlpha:0.0];
[UIView commitAnimations];