写这篇文章前赞一下环信的效率！在环信imgeek社区反馈图片转发问题，立马就收到环信SDK负责人回复，截至文章发表，图片转发的问题已经完全修复。
以下为反馈全文：
最近接手了一个集成即时通讯功能的项目，用的是环信的SDK。用环信的接口可以快速实现即时通讯的很多功能。并且对官方demo稍加改动基本能够满足项目需求。真机测试时，发现图片的转发，每次都是转发失败。原因是ContactListSelectViewController这个控制器里无法正确获取到想转发的图片的缓存地址。
修改如下图：
ContactListSelectViewController.m
代码拷走直接用
- (BOOL)messageViewController:(EaseMessageViewController *)viewController
didLongPressRowAtIndexPath:(NSIndexPath *)indexPath
{
id object = [self.dataArray objectAtIndex:indexPath.row];
if (![object isKindOfClass:[NSString class]]) {
EaseMessageCell *cell = (EaseMessageCell *)[self.tableView cellForRowAtIndexPath:indexPath];
//////////////////////////解决转发问题的代码///////////////////////////////
EMImageMessageBody *imageBody = (EMImageMessageBody*)[cell.model.message body];
EMMessageBodyType ty = cell.model.bodyType;
if (ty == EMMessageBodyTypeImage) {
NSString *str = cell.model.message == nil ? cell.model.thumbnailFileURLPath : [imageBody localPath]; [[NSUserDefaults standardUserDefaults] setValue:str forKey:@"imgTosand"];
}
/////////////////////////解决转发问题的代码//////////////////////// [cell becomeFirstResponder];
self.menuIndexPath = indexPath; [self showMenuViewController:cell.bubbleView andIndexPath:indexPath messageType:cell.model.bodyType];
}
return YES;
}ContactListSelectViewController是取数据，那么存数据要在ChatViewController控制器做存数据的操作。消息类型写死为EMChatTypeChat，是因为，不论是从单聊界面转发，还是从群聊界面转发，都只能转发给个人，所以这里写死，目前没有问题。
如下图：ChatViewController.m
代码拷走直接用
#pragma mark - EMUserListViewControllerDelegate
- (void)userListViewController:(EaseUsersListViewController *)userListViewController
didSelectUserModel:(id<IUserModel>)userModel
{
if (!self.messageModel) {
return;
}
if (self.messageModel.bodyType == EMMessageBodyTypeText) {
EMMessage *message = [EaseSDKHelper sendTextMessage:self.messageModel.text to:userModel.buddy messageType:EMChatTypeChat messageExt:self.messageModel.message.ext];
__weak typeof(self) weakself = self; [[EMClient sharedClient].chatManager sendMessage:message progress:nil completion:^(EMMessage *aMessage, EMError *aError) {
if (!aError) {
// NSMutableArray *array = [NSMutableArray arrayWithArray:[self.navigationController viewControllers]];
UIViewController *chatController = nil;
#ifdef REDPACKET_AVALABLE
chatController = [[RedPacketChatViewController alloc] initWithConversationChatter:userModel.buddy conversationType:EMConversationTypeChat];
#else
chatController = [[ChatViewController alloc]
initWithConversationChatter:userModel.buddy conversationType:EMConversationTypeChat];
#endif
chatController.title = userModel.nickname.length != 0 ? [userModel.nickname copy] : [userModel.buddy copy];
// if ([array count] >= 3) {
// [array removeLastObject];
// [array removeLastObject];
// }
// [array addObject:chatController];
// [weakself.navigationController setViewControllers:array animated:YES]; [weakself.navigationController popViewControllerAnimated:YES];
} else { [self showHudInView:self.view hint:Localized(@"transpondFail")];
}
}];
} else if (self.messageModel.bodyType == EMMessageBodyTypeImage) { [self showHudInView:self.view hint:Localized(@"transponding")];
__weak typeof(self) weakSelf = self;
NSString *localPath = [(EMImageMessageBody *)self.messageModel.message.body thumbnailLocalPath];
//////////////////////////解决转发问题的代码////////////////////////////
localPath = [[NSUserDefaults standardUserDefaults] valueForKey:@"imgTosand"];
//////////////////////////解决转发问题的代码//////////////////////////
UIImage *image = [UIImage imageWithContentsOfFile:localPath];
void (^block)() = ^(EMMessage *message){
EMImageMessageBody *imgBody = (EMImageMessageBody *)message.body;
NSString *from = [[EMClient sharedClient] currentUsername];
EMImageMessageBody *newBody = [[EMImageMessageBody alloc] initWithData:nil thumbnailData:[NSData dataWithContentsOfFile:imgBody.thumbnailLocalPath]];
newBody.thumbnailLocalPath = imgBody.thumbnailLocalPath;
newBody.thumbnailRemotePath = imgBody.thumbnailRemotePath;
newBody.remotePath = imgBody.remotePath;
EMMessage *newMsg = [[EMMessage alloc] initWithConversationID:userModel.buddy from:from to:userModel.buddy body:newBody ext:message.ext];
// newMsg.chatType = message.chatType;//此为环信代码
newMsg.chatType = EMChatTypeChat;//这里是我加的 [[EMClient sharedClient].chatManager sendMessage:newMsg progress:nil completion:^(EMMessage *message, EMError *error) {
if (error) { [weakSelf showHudInView:self.view hint:Localized(@"transpondFail")]; [weakSelf performSelector:@selector(backAction) withObject:nil afterDelay:1];
return ;
} [(EMImageMessageBody *)message.body setLocalPath:imgBody.localPath]; [[EMClient sharedClient].chatManager updateMessage:message completion:nil];
// NSMutableArray *array = [NSMutableArray arrayWithArray:[weakSelf.navigationController viewControllers]];
#ifdef REDPACKET_AVALABLE
RedPacketChatViewController *chatController = [[RedPacketChatViewController alloc] initWithConversationChatter:userModel.buddy conversationType:EMConversationTypeChat];
#else
ChatViewController *chatController = [[ChatViewController alloc] initWithConversationChatter:userModel.buddy conversationType:EMConversationTypeChat];
#endif
chatController.title = userModel.nickname.length != 0 ? userModel.nickname : userModel.buddy;
// if ([array count] >= 3) {
// [array removeLastObject];
// [array removeLastObject];
// }
// [array addObject:chatController];
// [weakSelf.navigationController setViewControllers:array animated:YES]; [weakSelf.navigationController popViewControllerAnimated:YES];//转发完跳回去
}];
};
if (!image) { [[EMClient sharedClient].chatManager downloadMessageThumbnail:self.messageModel.message progress:nil completion:^(EMMessage *message, EMError *error) {
if (error) { [weakSelf showHudInView:self.view hint:Localized(@"transpondFail")]; [weakSelf performSelector:@selector(backAction) withObject:nil afterDelay:1];
return ;
}
block(message);
}];
} else {
block(self.messageModel.message);
}
}
}上面一定要判断一下消息体类型，只有消息体为图片类型（EMMessageBodyTypeImage）才需要保存图片本地。如果不做判断的话，点击气泡马上崩掉。
通过我的方法可以解决图片转发的问题，但并不是最好的解决办法，推荐大家在做的时候参考环信官方的实现！
