在iOS7中在UINavigationBar下添加视图的最佳方法是什么 [英] What's the best way to add a view under UINavigationBar in iOS7

问题描述

在ios7上，许多应用程序（Apple Messages，Facebook Messenger，Calendar）都会在UINavigationBar下显示视图，通常会显示标准动画。因为它看起来非常标准并且看起来很多UIToolBar，我一直在寻找实现它的标准方法但却找不到任何东西。

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.

有没有更好的方法将UIToolBar添加到UINavigationBar？

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

推荐答案

你应该遵循这个简单的方法。

You should follow this simple approach.

• 像这样添加 UIToolBar 。

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];

在顶部导航项目上添加菜单按钮

Add a Menu Button on Top navigation item

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

现在实施 toggleMenu 功能。添加 BOOL 变量来跟踪移动。

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;
}

这是附件视频。

希望有所帮助。

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