关于iphone：在C中将字符串连接在一起

concatenate strings together in objective c

本问题已经有最佳答案，请猛点这里访问。

如何在目标C中连接字符串？

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- (IBAction)emailButton:(id)sender {
MFMailComposeViewController *mailContoller = [[MFMailComposeViewController alloc]init];
[mailContoller setMailComposeDelegate:self];
NSString *email = @"*******gmail.com";
NSString *email1 = @"*******@hotmail.co.uk";
NSArray *emailArray = [[NSArray alloc]initWithObjects:email, email1, nil];
NSString *message = [NSString stringWithFormat:@"%@
%@
%@",
textField1.text, textField2.text, textField3.text];
[mailContoller setMessageBody:message isHTML:NO];
[mailContoller setToRecipients:emailArray];
[mailContoller setSubject:@"IT WORKS!"];
[self presentViewController:mailContoller animated:YES completion:nil];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[[self myTextView] resignFirstResponder];
}

-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
[self dismissViewControllerAnimated:YES completion:nil];
}
@end

如有任何帮助，我们将不胜感激。

谢谢您

相关讨论

在最简单的情况下：

1	NSString* concatenatedString = [stringA stringByAppendingString: stringB];

根据您的代码，这：

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NSString *message = [NSString stringWithFormat:@"%@
%@
%@", textField1.text, textField2.text, textField3.text];

可以更好地表示为：

1 2	NSString *message = [@[textField1.text, textField2.text, textField3.text] componentsJoinedByString: @" "];

当只进行简单的连接时，+stringWithFormat:相对比较昂贵。