iphone – iOS：MFMailComposeViewController无法处理模型

概述遇到MFMessageComposeViewController问题. 情况是这样的： 我正在创建一个模型,它将实现MFMessageComposeViewController而不是直接在ViewController中执行它.现在,当我实现presentModalViewController ::方法时,它工作正常(出现mail.app接口)但是当我单击mail.app界面中的取消/发送按钮时,它 遇到MFMessageComposeVIEwController问题.
情况是这样的：

我正在创建一个模型,它将实现MFMessageComposeVIEwController而不是直接在VIEwController中执行它.现在,当我实现presentModalVIEwController ::方法时,它工作正常(出现mail.app接口)但是当我单击mail.app界面中的取消/发送按钮时,它不会忽略mail.app ..

它像这样的东西：

MSGVIEwController的一个方法片段,它实现了发送邮件模型：

- (IBAction)openEmail:(ID)sender {    Messaging *mail = [[Messaging alloc]initWithModal:self];    [mail emailinvitation:@"Eventz Date" eventAt:@"Eventz Location" withImage:nil];    [self.sendingStatus setText:mail.sendingStatus];}

我实现消息传递的模型：

Messaging.h

#import <Foundation/Foundation.h>#import <MessageUI/MessageUI.h>@interface Messaging : NSObject <MFMailComposeVIEwControllerDelegate,MFMessageComposeVIEwControllerDelegate>@property (nonatomic,copy) Nsstring *sendingStatus;@property (nonatomic,retain) ID modal;- (ID)initWithModal:(ID)modal;- (voID)emailinvitation:(Nsstring *)eventDate eventAt:(Nsstring *)eventLocation withImage:(UIImage *)imageAttachment;@end

Messaging.m

#import "Messaging.h"@implementation Messaging@synthesize sendingStatus = _sendingStatus;@synthesize modal = _modal;- (ID)initWithModal:(ID)modal{    self = [super init];    self.modal = modal;    return self;}- (voID)emailinvitation:(Nsstring *)eventDate eventAt:(Nsstring *)eventLocation withImage:(UIImage *)imageAttachment{    MFMailComposeVIEwController *mailer = [[MFMailComposeVIEwController alloc] init];    if ([MFMailComposeVIEwController canSendMail]){              mailer.mailComposeDelegate = self;        [mailer setSubject:@"Event Invitation"];        [mailer setMessageBody:@"message body"] isHTML:NO];        if(imageAttachment != nil){            NSData *imageData = UIImagePNGRepresentation(imageAttachment);            [mailer addAttachmentData:imageData mimeType:@"image/png" filename:@"imagefilename"];        }        [self.modal presentModalVIEwController:mailer animated:YES];        return;    }    [self deviceDoNotSupportMessaging];        }- (voID)mailComposeController:(MFMailComposeVIEwController*)controller dIDFinishWithResult:(MFMailComposeResult)result error:(NSError*)error{    NSLog(@"called");    switch (result)    {        case MFMailComposeResultCancelled:            self.sendingStatus = @"Mail sending cancelled.";            break;        case MFMailComposeResultSaved:            self.sendingStatus = @"Mail saved.";            break;        case MFMailComposeResultSent:            self.sendingStatus = @"Mail sent.";            break;        case MFMailComposeResultFailed:            self.sendingStatus = @"Mail sending Failed.";            break;        default:            self.sendingStatus = @"Mail not sent.";            break;    }    [controller dismissModalVIEwControllerAnimated:YES];}

BTW,NSLog(@“叫”);在.m中实际上并未调用…
有人可以有任何建议吗？感谢：D

解决方法 我想知道为什么当你的指针被dealloc’d时你没有得到错误.我使用你的代码并在实例化Message类时立即得到了这个错误：

Messaging *mail = [[Messaging alloc]initWithModal:self];

所以我改变了一件事,我在我的通话类中发送了一个Strong Property：

@property (strong,nonatomic) Messaging *mail;

然后这样称呼它：

mail = [[Messaging alloc]initWithModal:self];                [mail emailinvitation:@"Eventz Date" eventAt:@"Eventz Location" withImage:nil];                NSLog(@"Called the emailinvitation");

调用了日志语句,我甚至确保MailComposer得到了正确的响应：

- (voID)mailComposeController:(MFMailComposeVIEwController*)controller dIDFinishWithResult:(MFMailComposeResult)result error:(NSError*)error{    NSLog(@"called");    switch (result)    {        case MFMailComposeResultCancelled:            self.sendingStatus = @"Mail sending cancelled.";            NSLog(@"Mail Cancelled");            break;        case MFMailComposeResultSaved:            self.sendingStatus = @"Mail saved.";            NSLog(@"Mail Saved");            break;        case MFMailComposeResultSent:            self.sendingStatus = @"Mail sent.";            NSLog(@"Mail Sent");            break;        case MFMailComposeResultFailed:            self.sendingStatus = @"Mail sending Failed.";            NSLog(@"Mail Failed");            break;        default:            self.sendingStatus = @"Mail not sent.";            NSLog(@"Mail Not Sent");            break;    }    [controller dismissModalVIEwControllerAnimated:YES];}

它确实如此.

顺便说一句 – 我喜欢你这样做的方式.这是OOP应该完成的方式.

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