在SDK中打开其他接入应用的解决方案

// 检查用户是否配置了AppId  
// 有没有准确配置Info的CFBundleURLSchemes字段  
// 是不是可以正确打开  
if (!kAppId) {  
    UIAlertView *alertView = [[UIAlertView alloc]  
                              initWithTitle:@"Setup Error"  
                              message:@"Missing app ID. You cannot run the app until you provide this in the code."  
                              delegate:self  
                              cancelButtonTitle:@"OK"  
                              otherButtonTitles:nil,  
                              nil];  
    [alertView show];  
    [alertView release];  
} else {  
    // Now check that the URL scheme fb[app_id]://authorize is in the .plist and can  
    // be opened, doing a simple check without local app id factored in here  
    NSString *url = [NSString stringWithFormat:@"fb%@://authorize",kAppId];  
    BOOL bSchemeInPlist = NO; // find out if the sceme is in the plist file.  
    NSArray* aBundleURLTypes = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleURLTypes"];  
    if ([aBundleURLTypes isKindOfClass:[NSArray class]] &&  
        ([aBundleURLTypes count] > 0)) {  
        NSDictionary* aBundleURLTypes0 = [aBundleURLTypes objectAtIndex:0];  
        if ([aBundleURLTypes0 isKindOfClass:[NSDictionary class]]) {  
            NSArray* aBundleURLSchemes = [aBundleURLTypes0 objectForKey:@"CFBundleURLSchemes"];  
            if ([aBundleURLSchemes isKindOfClass:[NSArray class]] &&  
                ([aBundleURLSchemes count] > 0)) {  
                NSString *scheme = [aBundleURLSchemes objectAtIndex:0];  
                if ([scheme isKindOfClass:[NSString class]] &&  
                    [url hasPrefix:scheme]) {  
                    bSchemeInPlist = YES;  
                }  
            }  
        }  
    }  
    // Check if the authorization callback will work  
    BOOL bCanOpenUrl = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString: url]];  
    if (!bSchemeInPlist || !bCanOpenUrl) {  
        UIAlertView *alertView = [[UIAlertView alloc]  
                                  initWithTitle:@"Setup Error"  
                                  message:@"Invalid or missing URL scheme. You cannot run the app until you set up a valid URL scheme in your .plist."  
                                  delegate:self  
                                  cancelButtonTitle:@"OK"  
                                  otherButtonTitles:nil,  
                                  nil];  
        [alertView show];  
        [alertView release];  
    }  
}  

二、调用IOS自带的应用：

上面讲述的是调用自身的应用，讲解了如何在自己应用之间调用问题，今天介绍一下如果调用IOS自带的app的方法

一、调用app store界面方法

在实际开发中，往往要推荐自己其他应用和推荐自己的收费软件，那么我们就需要在程序中直接连接到app store的相应页面。

实际上的做法很简单，使用的还是UIApplication类的OpenURL方法： 

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"程序的相应连接"]];

二、调用其它应用的方法

1）调用 自带mail


[[UIApplicationsharedApplication] openURL:[NSURLURLWithString:@"mailto://admin@hzlzh.com"]];

2）调用 电话phone


[[UIApplication sharedApplication] openURL:[NSURLURLWithString:@"tel://8008808888"]];


3）调用 SMS


[[UIApplicationsharedApplication] openURL:[NSURL URLWithString:@"sms://800888"]];


4）调用自带 浏览器 safari


[[UIApplicationsharedApplication] openURL:[NSURLURLWithString:@"http://www.hzlzh.com"]];

5）调用 Remote


[[UIApplicationsharedApplication] openURL:[NSURL URLWithString:@"remote://fff"]];

上面是最基本的语句，没什么处理过程。

如：调用phone可以传递号码，调用SMS只能设定号码，不能初始化SMS内容。

-(IBAction)openMaps {//打开地图  
    // Where is Apple on the map anyway?  
    NSString* addressText = @”1 Infinite Loop, Cupertino, CA 95014″;  
    // URL encode the spaces  
    addressText =  [addressText stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding];  
    NSString* urlText = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@", addressText];  
    // lets throw this text on the log so we can view the url in the event we have an issue  
    NSLog(urlText);  
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlText]];  
    }  
    -(IBAction)openEmail {//打开mail  
    // Fire off an email to apple support  
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://devprograms@apple.com"]];  
    }  
    -(IBAction)openPhone {//拨打电话  
    // Call Google 411  
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://8004664411"]];  
    }  
    -(IBAction)openSms {//打开短信  
    // Text to Google SMS  
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://466453"]];  
    }  
    -(IBAction)openBrowser {//打开浏览器  
    // Lanuch any iPhone developers fav site  
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://itunesconnect.apple.com"]];  
}  

二、  ios开发，两个app之间相互调用

1、新建两个项目：AppOne，AppTwo；

2、分别在其属性列表中添加如下：

项目A：