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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转载自zcw-java.iteye.com/blog/1727663