//Add the Framework in .h file

#import <MessageUI/MessageUI.h>
#import <MessageUI/MFMailComposeViewController.h>

//Set the delegate methods

UIViewController<UINavigationControllerDelegate,MFMessageComposeViewControllerDelegate>

//add the below code in .m file


- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];

    MFMessageComposeViewController *controller = 
    [[[MFMessageComposeViewController alloc] init] autorelease];

    if([MFMessageComposeViewController canSendText])
    { 
        NSString *str= @"Hello";
        controller.body = str;
        controller.recipients = [NSArray arrayWithObjects:
                                 @"", nil];
        controller.delegate = self;
        [self presentModalViewController:controller animated:YES];  
    }


}

- (void)messageComposeViewController:
(MFMessageComposeViewController *)controller
                 didFinishWithResult:(MessageComposeResult)result 
{
    switch (result)
    {
        case MessageComposeResultCancelled:  
            NSLog(@"Cancelled");    
            break; 
        case MessageComposeResultFailed:
            NSLog(@"Failed");
            break;   
        case MessageComposeResultSent:      
            break; 
        default:  
            break;  
    }  
    [self dismissModalViewControllerAnimated:YES]; 
}

如果您愿意，您可以使用名为CTMessageCenter类的私有框架CoreTelephony。有一些发送短信的方法。

You must add the MessageUI.framework to your Xcode project Include an #import <MessageUI/MessageUI.h> in your header file Add these delegates to your header file MFMessageComposeViewControllerDelegate & UINavigationControllerDelegate In your IBAction method declare instance of MFMessageComposeViewController say messageInstance To check whether your device can send text use [MFMessageComposeViewController canSendText] in an if condition, it'll return Yes/No In the if condition do these: First set body for your messageInstance as: messageInstance.body = @"Hello from Shah"; Then decide the recipients for the message as: messageInstance.recipients = [NSArray arrayWithObjects:@"12345678", @"87654321", nil]; Set a delegate to your messageInstance as: messageInstance.messageComposeDelegate = self; In the last line do this: [self presentModalViewController:messageInstance animated:YES];

[[UIApplication sharedApplication]openURL:[NSURL URLWithString:@"sms:number"]] 

这将是最好和最简单的方法。

MacOS中进程间通信的系统之一是XPC。该系统层是基于libSystem和launchd的plist结构传输而开发的进程间通信层。事实上，它是一个允许通过交换字典等结构来管理进程的接口。由于遗传，iOS 5也拥有这种机制。

你可能已经明白我的介绍是什么意思。是的，iOS中的系统服务包括用于XPC通信的工具。我想用一个用于SMS发送的守护进程来举例说明工作。但是，应该提到的是，这个能力在iOS 6中是固定的，但与iOS 5.0-5.1.1相关。越狱、私有框架和其他非法工具都不需要使用它。只需要目录/usr/include/xp /*中的头文件集。

iOS中用于发送SMS的元素之一是系统服务com.apple。Chatkit，其任务包括生成、管理和发送短文本消息。为了便于控制，它具有公开可用的通信端口com.apple.chatkit.clientcomposeserver.xpc。使用XPC子系统，您可以在不需要用户批准的情况下生成和发送消息。

好吧，让我们试着建立联系。

xpc_connection_t myConnection;

dispatch_queue_t queue = dispatch_queue_create("com.apple.chatkit.clientcomposeserver.xpc", DISPATCH_QUEUE_CONCURRENT);

myConnection = xpc_connection_create_mach_service("com.apple.chatkit.clientcomposeserver.xpc", queue, XPC_CONNECTION_MACH_SERVICE_PRIVILEGED);

现在我们已经将XPC连接myConnection设置为SMS发送服务。但是，XPC配置提供了创建挂起连接的功能——我们需要再采取一步来激活。

xpc_connection_set_event_handler(myConnection, ^(xpc_object_t event){
xpc_type_t xtype = xpc_get_type(event);
if(XPC_TYPE_ERROR == xtype)
{
NSLog(@"XPC sandbox connection error: %s\n", xpc_dictionary_get_string(event, XPC_ERROR_KEY_DESCRIPTION));
}
// Always set an event handler. More on this later.

NSLog(@"Received a message event!");

});

xpc_connection_resume(myConnection);

连接已激活。此时此刻，iOS 6将在电话日志中显示一条消息，禁止这种类型的通信。现在，我们需要生成一个类似于xpc_dictionary的字典，其中包含消息发送所需的数据。

NSArray *recipient = [NSArray arrayWithObjects:@"+7 (90*) 000-00-00", nil];

NSData *ser_rec = [NSPropertyListSerialization dataWithPropertyList:recipient format:200 options:0 error:NULL];

xpc_object_t mydict = xpc_dictionary_create(0, 0, 0);
xpc_dictionary_set_int64(mydict, "message-type", 0);
xpc_dictionary_set_data(mydict, "recipients", [ser_rec bytes], [ser_rec length]);
xpc_dictionary_set_string(mydict, "text", "hello from your application!");

剩下的不多了:将消息发送到XPC端口，并确保它被交付。

xpc_connection_send_message(myConnection, mydict);
xpc_connection_send_barrier(myConnection, ^{
NSLog(@"The message has been successfully delivered");
});

这是所有。短信发送。

//Add the Framework in .h file

#import <MessageUI/MessageUI.h>
#import <MessageUI/MFMailComposeViewController.h>

//Set the delegate methods

UIViewController<UINavigationControllerDelegate,MFMessageComposeViewControllerDelegate>

//add the below code in .m file


- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];

    MFMessageComposeViewController *controller = 
    [[[MFMessageComposeViewController alloc] init] autorelease];

    if([MFMessageComposeViewController canSendText])
    { 
        NSString *str= @"Hello";
        controller.body = str;
        controller.recipients = [NSArray arrayWithObjects:
                                 @"", nil];
        controller.delegate = self;
        [self presentModalViewController:controller animated:YES];  
    }


}

- (void)messageComposeViewController:
(MFMessageComposeViewController *)controller
                 didFinishWithResult:(MessageComposeResult)result 
{
    switch (result)
    {
        case MessageComposeResultCancelled:  
            NSLog(@"Cancelled");    
            break; 
        case MessageComposeResultFailed:
            NSLog(@"Failed");
            break;   
        case MessageComposeResultSent:      
            break; 
        default:  
            break;  
    }  
    [self dismissModalViewControllerAnimated:YES]; 
}