iOS SDK: Working with URL Schemes

 在自己的viewcontroller上面加 3个button ：，然后添加3个对应的方法：

-(IBAction) openMaps:(id)sender { // Opens a map containing Envato's Headquarters UIApplication *ourApplication = [UIApplication sharedApplication]; NSString *ourPath = @"http://maps.google.com/maps?ll=-37.812022,144.969277"; NSURL *ourURL = [NSURL URLWithString:ourPath]; [ourApplication openURL:ourURL]; } -(IBAction) openYoutube:(id)sender { // Opens a video of an iPad 2 Commercial UIApplication *ourApplication = [UIApplication sharedApplication]; NSString *ourPath = @"http://www.youtube.com/watch?v=TFFkK2SmPg4"; NSURL *ourURL = [NSURL URLWithString:ourPath]; [ourApplication openURL:ourURL]; } -(IBAction) openReceiverApp:(id)sender { // Opens the Receiver app if installed, otherwise displays an error UIApplication *ourApplication = [UIApplication sharedApplication]; NSString *URLEncodedText = [self.textBox.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSString *ourPath = [@"readtext://" stringByAppendingString:URLEncodedText]; //重点：readtext:// 就是你第二个app 的标示 NSURL *ourURL = [NSURL URLWithString:ourPath]; if ([ourApplication canOpenURL:ourURL]) { [ourApplication openURL:ourURL]; } else { //Display error UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Receiver Not Found" message:@"The Receiver App is not installed. It must be installed to send text." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alertView show]; [alertView release]; } } 然后在第二个app 中  打开XXX-Info.plist  文件 打开info.plist，添加一项URL types 展开URL types，再展开Item1，将Item1下的URL identifier修改为URL Scheme 展开URL Scheme，将Item1的内容修改为myapp 其他程序可通过readtext://访问此自定义URL 然后在第二个app 的xxxAppDelegate.m中写 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.window.rootViewController = self.viewController; [self.window makeKeyAndVisible]; //Display error is there is no URL if (![launchOptions objectForKey:UIApplicationLaunchOptionsURLKey]) { UIAlertView *alertView; alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"This app was launched without any text. Open this app using the Sender app to send text." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alertView show]; [alertView release]; } return YES; } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.window.rootViewController = self.viewController; [self.window makeKeyAndVisible]; //Display error is there is no URL if (![launchOptions objectForKey:UIApplicationLaunchOptionsURLKey]) { UIAlertView *alertView; alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"This app was launched without any text. Open this app using the Sender app to send text." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alertView show]; [alertView release]; } return YES; } 这样这2个app 就 可以完成通信了 ！ 哈哈！ 具体参考链接：http://mobile.tutsplus.com/tutorials/iphone/ios-sdk-working-with-url-schemes/ 系统的openurl有 Map http://maps.google.com/maps?q=Shanghai Email mailto://[email protected] Tel tel://10086 Msg sms://10086 Map http://maps.google.com/maps?q=Shanghai Email mailto://[email protected]  Tel tel://10086  Msg sms://10086