如何代码实现跳转safari，phone或message？

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在相应的代码中写入：
1、调用 电话phone

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[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://4008008288"]];

2、调用自带 浏览器 safari

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[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.abt.com"]];

3、调用 自带mail

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[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://admin@abt.com"]];

4、调用 SMS

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

5，跳转到系统设置相关界面

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[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=WIFI"]];

其中，发短信，发Email的功能只能填写要发送的地址或号码，无法初始化发送内容，如果想实现内容的话，还需要更复杂一些，实现其各自的委托方法。
若需要传递内容可以做如下操作：
加入：MessageUI.framework

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#import <messageui /MFMessageComposeViewController.h></messageui>

实现代理：MFMessageComposeViewControllerDelegate

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调用sendSMS函数
//内容，收件人列表
- (void)sendSMS:(NSString *)bodyOfMessage recipientList:(NSArray *)recipients
{
??
????MFMessageComposeViewController *controller = [[[MFMessageComposeViewController alloc] init] autorelease];
??
????if([MFMessageComposeViewController canSendText])
??
????{
??
????????controller.body = bodyOfMessage;?? 
??
????????controller.recipients = recipients;
??
????????controller.messageComposeDelegate = self;
??
????????[self presentModalViewController:controller animated:YES];
??
????}?? 
??
}
??
// 处理发送完的响应结果
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result
{
??[self dismissModalViewControllerAnimated:YES];
??
??if (result == MessageComposeResultCancelled)
????NSLog(@"Message cancelled")
??else if (result == MessageComposeResultSent)
????NSLog(@"Message sent")? 
??else
????NSLog(@"Message failed")? 
}
??
??
发送邮件的为：
导入#import <MessageUI/MFMailComposeViewController.h>
实现代理：MFMailComposeViewControllerDelegate
??
//发送邮件
-(void)sendMail:(NSString *)subject content:(NSString *)content{
??
????MFMailComposeViewController *controller = [[[MFMailComposeViewController alloc] init] autorelease];
??
????if([MFMailComposeViewController canSendMail])
??
????{
??
????????[controller setSubject:subject];
??
????????[controller setMessageBody:content isHTML:NO];
??
????????controller.mailComposeDelegate = self;
??
????????[self presentModalViewController:controller animated:YES];
??
????}??? 
}
??
//邮件完成处理
-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
??
????[self dismissModalViewControllerAnimated:YES];
??
????if (result == MessageComposeResultCancelled)
????????NSLog(@"Message cancelled");
????else if (result == MessageComposeResultSent)
????????NSLog(@"Message sent"); 
????else
????????NSLog(@"Message failed");? 
??
}
??
默认发送短信的界面为英文的，解决办法为：在.xib 中的Localization添加一組chinese

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