IOS--GPS闹钟离线版－－01toolBar添加退出程序按钮

初始化toolbar的代码

- (void)initToolBar
{
    //    UIBarButtonItem * flexble = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    
    _showSegment = [[UISegmentedControl alloc]initWithItems:[NSArray arrayWithObjects:@"开始",@"停止", nil]];
    [_showSegment addTarget:self action:@selector(showsSegmentAction:) forControlEvents:UIControlEventValueChanged];
    _showSegment.selectedSegmentIndex = 1;
    UIBarButtonItem * showItem = [[UIBarButtonItem alloc]initWithCustomView:_showSegment];
    
    //退出程序按钮
    UIButton * myBtn = [UIButton buttonWithType:UIButtonTypeSystem];
    [myBtn setFrame:CGRectMake(0, 0, 80, 44)];
    myBtn.titleLabel.font=[UIFont systemFontOfSize:15];
    
    [myBtn setTitle:@"退出程序" forState:UIControlStateNormal];
    myBtn.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;
    
    [myBtn addTarget:self action:@selector(exitAPP) forControlEvents:UIControlEventTouchUpInside];
    
    UIBarButtonItem *myButtonItem1 = [[UIBarButtonItem alloc]initWithCustomView:myBtn];
    
    NSLog(@"showitem width = %f  totalwidth = %f",_showSegment.frame.size.width,CGRectGetWidth(self.view.bounds));
    
    _DesLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(self.view.bounds)- _showSegment.frame.size.width-26-80, 40)];
    
    _DesLabel.font=[UIFont systemFontOfSize:15];
    _DesLabel.backgroundColor = [UIColor clearColor];
    _DesLabel.textAlignment = NSTextAlignmentCenter ;
    UIBarButtonItem * myButtonItem2 = [[UIBarButtonItem alloc]initWithCustomView:_DesLabel];
    
    
    self.toolbarItems = [NSArray arrayWithObjects:showItem,myButtonItem2,myButtonItem1, nil];
}

退出程序的代码

//退出App
- (void)exitAPP
{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"要退出程序吗" preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        exit(0);
    }];
    
    [alertController addAction:cancelAction];
    [alertController addAction:okAction];
    [self presentViewController:alertController animated:YES completion:nil];
    
}

Navigation bar 添加搜索栏和右边的按钮

搜索栏：

#pragma mark初始化 搜索栏
- (void)initSearchBar
{
    
    _searchBar = [[UISearchBar alloc] initWithFrame:CGRectZero];
    _searchBar.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    _searchBar.barStyle = UIBarStyleBlack;
    _searchBar.delegate = self;
    _searchBar.placeholder = @"请输入要搜索的地址";
    _searchBar.keyboardType = UIKeyboardTypeDefault;
    
    //添加搜索栏到NavigationItem的titleView上面
    self.navigationItem.titleView = self.searchBar;
    
    [self.searchBar sizeToFit];
}

右边离线地图按钮（action还没写）

- (void)addOfflineButton
{
    //创建一个button
    UIBarButtonItem * rightButton = [[UIBarButtonItem alloc]initWithTitle:@"离线地图" style:UIBarButtonItemStylePlain target:self action:nil];
    
    self.navigationItem.rightBarButtonItem = rightButton;
}

    

显示效果如下：