ios NavBar+TarBar技巧

NavBar+TarBar

iphone开发 NavBar+TarBar

1  改变NavBar颜色:选中Navigation Bar 的Tint属性。选中颜色。

2  隐藏“back”按钮: self.navigationItem.hidesBackButton = YES;

3 隐藏"NavBar" : self.navigationController.navigationBarHidden = YES;

4 可以不用MainWindow.xib创建的Navigation。在每个view上自定义。

需要把每个控制页都加上以下代码来隐藏nav:

-(void)viewWillAppear:(BOOL)animated

{

    self.navigationController.navigationBarHidden = YES;//显示"NavBar"

}

然后在每个控制页xib自己添加Navigation Bar。添加所需BarButtonItem按钮。

5 页面跳转隐藏tarbar :

HomeDetailViewController *detailview = [[HomeDetailViewController alloc] initWithNibName:@"HomeDetailView" bundle:nil];

detailview.hidesBottomBarWhenPushed = YES;//隐藏tarbar 

[self.navigationController pushViewController:detailview animated:YES];

[detailview     release];

6 页面返回:

[self.navigationController popViewControllerAnimated:YES];

7 默认选中tabbar为第一个view:

TabBarController.selectedIndex= 0;

其他:

8 已知两地经纬度 计算两地之间的距离:

//    地图显示当前位置:

    mapView.showsUserLocation=YES;

    CLLocationManager *locationManager = [[CLLocationManager alloc] init];//创建位置管理器

    locationManager.delegate=self;//设置代理

    locationManager.desiredAccuracy=kCLLocationAccuracyBest;//指定需要的精度级别为最佳精度

    locationManager.distanceFilter=1000.0f;//设置距离筛选器为任何移动都要发送更新

    [locationManager startUpdatingLocation];//启动位置管理器

    MKCoordinateSpan theSpan;

    //地图的范围 越小越精确

    theSpan.latitudeDelta=0.05;

    theSpan.longitudeDelta=0.05;

    MKCoordinateRegion theRegion;

    theRegion.center=[[locationManager location] coordinate];

    theRegion.span=theSpan;

    [mapView setRegion:theRegion];

    [locationManager release];

    

    MKUserLocation *usrLoc=mapView.userLocation;

    CLLocationCoordinate2D usrCoordinate=usrLoc.location.coordinate;

    NSLog(@"la==%f lo==%f",usrCoordinate.latitude,usrCoordinate.longitude);

    

//   已知两点的经纬度,计算出两地距离:

    CLLocation *location1 = [[[CLLocation alloc] initWithLatitude:usrCoordinate.latitude longitude:usrCoordinate.longitude] autorelease];

    CLLocation *location2 = [[[CLLocation alloc] initWithLatitude:36.676445 longitude:117.106793] autorelease];

    NSLog(@"JULI====%.0f km", [location1 distanceFromLocation:location2]);//4502

9 取小数点后两位(四舍五入),输出:

NSLog(@"%.02f km",4478.442312); 

10 调用打电话API :

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://10010"]];

使用这种方式拨打电话时,当用户结束通话后,iphone界面会停留在电话界面。

用如下方式,可以使得用户结束通话后自动返回到应用:

UIWebView*callWebview =[[UIWebView alloc] init];

    NSURL *telURL =[NSURL URLWithString:@"tel:10086"];// 貌似tel:// 或者 tel: 都行

    [callWebview loadRequest:[NSURLRequest requestWithURL:telURL]];

    //记得添加到view上

    [self.view addSubview:callWebview];

11 调用 SMS发短信:

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://15315310992"]];

12 调用自带 浏览器 safari

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@http://www.baidu.com]];

13 在一个程序里打开另一个程序:

首先:plist里添加URL types   点开里边的Item0  添加URLSchemes  打开Item0 输入sinaWeibo

然后在需要调用的地方:[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sinaWeibo://*"]];

https://itunes.apple.com/cn/app/qq-2012/id444934666?mt=8

14 双引号转义:

用 \" 表示 双引号

15 设置按钮按下换图片 松开还是原图

//                [danxuan setImage:[UIImage imageNamed:@"exercise_option_n.png"] forState:UIControlStateNormal];

                //这个是设置按下的图片,松开就是上面的图片

//               [danxuan setImage:[UIImage imageNamed:@"exercise_option_s.png"] forState:UIControlEventTouchDragOutside];

16  判断数组中是否存在某元素:

BOOL isValue=[keyArray containsObject:@"aaa"];

17 Nav添加button

UIButton *btnBack = [ABUtil createNavigationCtrollerRoundedRectBtn:Localized(@"取消")];

    [btnBack addTarget:self

                action:@selector(tapLeftBarButton)

      forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:btnBack];

    self.navigationItem.leftBarButtonItem = leftBarButtonItem;

    [btnBack release];

    [leftBarButtonItem release]

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