[课堂实践与项目]邮件--短信--相机或相册 的相片调用

1.UIImagePickerController  相片调用控制器

在进行app开发的时候，有的时候会通过设备获取 相片，那么就需要调用UIImagePickerController 这个控制器。

我们只需要简单的alloc出这个控制器实例，然后实现其对应的代理方法UIImagePickerControllerDelegate即可。

  1）下面给出页面跳转的代码：

- (IBAction)selectAndMessageImage:(id)sender {
    
    
    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
    //首先设置当前的image获取源是  Camera。
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

//如果相机不可用，那么就设置当前的imageSource为  相册。
        sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    
    UIImagePickerController *picker = [[UIImagePickerController alloc]init];
    
    picker.delegate = self;
    
    picker.allowsEditing = YES;
    
    picker.sourceType = sourceType;
    
    [self presentViewController:picker animated:YES completion:nil];
    
    
}

2）实现代理方法  UIimagePickerControllerDelegate

#pragma mark UIImagePickerController Delegate Methods
//点击CHoose 按钮之后，表示已经选取了一张照片。那么imagePickerVC就消失，并调用showActivityViewController 方法。
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissViewControllerAnimated:YES completion:nil];
    
    self.image = [info objectForKey:UIImagePickerControllerEditedImage];
    
    [self performSelector:@selector(showActivityViewController) withObject:nil afterDelay:1];


}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker  dismissViewControllerAnimated:YES completion:nil];
}

3）下面的方法就是在选择之后调用的ActivityVC方法

- (void)showActivityViewController
{
    NSString *message = @"i took a pickture on my iphone";
    
    NSArray *activityItems = @[message,self.image];
    
    
    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:nil];
    
    [self presentViewController:activityVC animated:YES completion:nil];

}

2.短信 MFMessageComposeViewController

messageVC里面有两个选择项：recipients 是发送给谁，body是发送的消息内容。

- (IBAction)MessageVCShow:(id)sender {
    
    MFMessageComposeViewController *messageVC = [[MFMessageComposeViewController alloc]init];
    
    messageVC.messageComposeDelegate = self;
    
    messageVC.recipients = @[@"xuna"];
    messageVC.body = @"hello meimei";
    
    [self presentViewController:messageVC animated:YES completion:nil];
    
    
}

//对我们发送的消息状态进行判断，并dismissVC
#pragma mark  MFMessageComposeViewControllerDelegate
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result
{
    
    switch (result) {
        case MessageComposeResultCancelled:
            NSLog(@"cancel");
            break;
        case MessageComposeResultSent:
            NSLog(@"sent");
            break;
            case MessageComposeResultFailed:
            NSLog(@"faild");
            break;
        default:
            break;
    }
    
    [controller dismissViewControllerAnimated:YES completion:nil];
    

}

3.邮件 MFMailComposeViewController

邮件VC和messageVC 的区别就在于 里面的设置项的不同，其余都是相似的。

- (IBAction)mailVCShow:(id)sender {
    
    MFMailComposeViewController *mailVC = [[MFMailComposeViewController alloc]init];
    
    mailVC.mailComposeDelegate = self;
    
    [mailVC setToRecipients:@[@"10915819@qq.com"]];
    
    [mailVC setCcRecipients:@[@"276560266@qq.com"]];
    
    [mailVC setBccRecipients:@[@"1414129720@qq.com"]];
    
    [mailVC setMessageBody:@"hello world" isHTML:NO];
    
    
    NSString *path = [[NSBundle mainBundle]pathForResource:@"1" ofType:@"png"];
    
    NSData *data = [NSData dataWithContentsOfFile:path];
    
    [mailVC addAttachmentData:data mimeType:@"image/png" fileName:@"surprisePic"];
    
    
    [self presentViewController:mailVC animated:YES completion:nil];
    
}

//MFMailconposeVIewCOntrollerDelegate
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
    
    switch (result) {
        case MFMailComposeResultCancelled:
            NSLog(@"QUXIAO");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"FAILED");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"SAVE");
            break;
        case MFMailComposeResultSent:
            NSLog(@"SENT");
            break;
            
        default:
            break;
    }
    
    [controller dismissViewControllerAnimated:YES completion:nil];
    

}