iphone - iOS : How to attach a multiple attachment file in one button using pickerview method?

Question

我有一个多个文件要附加到选择器 View 中。当用户选择该选择器 View 项目时，他们可以单击电子邮件按钮来附加所选文件。我该如何在选择器 View 中执行此操作？

这是我的示例代码。

M 文件:

-(void)pickerViewEmail:(UIPickerView *)pickerViewEmail didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{


    if ([[musicList objectAtIndex:row] isEqual:@"m1"])
    {

        MFMailComposeViewController *pickerEmail = [[MFMailComposeViewController alloc] init];
        pickerEmail.mailComposeDelegate = self;

        NSString *path = [[NSBundle mainBundle] pathForResource:@"m1" ofType:@"mp3"];
        NSData *myData = [NSData dataWithContentsOfFile:path];
        [pickerEmail addAttachmentData:myData mimeType:@"audio/mp3" fileName:@"m1"];

        [pickerEmail setSubject:@"Hello!"];

        // Set up recipients
        NSArray *toRecipients = [NSArray arrayWithObject:@"first@example.com"]; 
        NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil]; 
        NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@example.com"]; 

        [pickerEmail setToRecipients:toRecipients];
        [pickerEmail setCcRecipients:ccRecipients]; 
        [pickerEmail setBccRecipients:bccRecipients];

        // Fill out the email body text
        NSString *emailBody = @"Hello";
        [pickerEmail setMessageBody:emailBody isHTML:NO];

        [self presentModalViewController:pickerEmail animated:YES];
        [pickerEmail release];

    }

电子邮件按钮:我如何从这里开始。

-(IBAction)showEmail
{

    if ([MFMailComposeViewController canSendMail])
    {
                 [self pickerEmail]; I have a yellow error when i call this. What is the right solution?

    }

    else
    {

    }


}

Answer 1

当用户在选择器 View 中选择行时，您将行标题保存到一些常用变量中使用

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

您可以对所有 pickerView 使用一个 pickerView 委托(delegate)方法。要确定选择哪个 pickerView，您应该检索发件人。

然后在您的 showEmail 方法中，您只需使用保存的变量。

示例代码。只需将 3 个不同的委托(delegate)绑定(bind)到 IB 中的 3 个 slider 即可:

-(IBAction)slider1Changed:(id)sender {
    UISlider *slider = (UISlider *) sender;
    int progressAsInt =(int)(slider.value + 0.5f);
    NSString *newText =[[NSString alloc]
                        initWithFormat:@"%d",progressAsInt];
    label1.text = newText;
    NSString *imgFileName = [NSString stringWithFormat:@"gold%i.png", progressAsInt];
    image1.image = [UIImage imageNamed:imgFileName];

    [newText release];
}

-(IBAction)slider2Changed:(id)sender {
    UISlider *slider = (UISlider *) sender;
    int progressAsInt =(int)(slider.value + 0.5f);
    NSString *newText =[[NSString alloc]
                        initWithFormat:@"%d",progressAsInt];
    label2.text = newText;
    NSString *imgFileName = [NSString stringWithFormat:@"gold%i.png", progressAsInt];
    image2.image = [UIImage imageNamed:imgFileName];
    [newText release];
}

-(IBAction)slider3Changed:(id)sender {
    UISlider *slider = (UISlider *) sender;
    int progressAsInt =(int)(slider.value + 0.5f);
    NSString *newText =[[NSString alloc]
                        initWithFormat:@"%d",progressAsInt];
    label3.text = newText;
    NSString *imgFileName = [NSString stringWithFormat:@"gold%i.png", progressAsInt];
    image3.image = [UIImage imageNamed:imgFileName];
    [newText release];
}