ios开发之NavBar和TarBar使用技巧选自(http://www./) 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; 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://*"]]; 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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