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。我开始以为是我集成时有疏漏，逐行检查代码。发现并不是我的问题。从app store下载的官方demo同样是转发失败！！坑我啊！！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。
个人感觉虽然能解决图片转发的问题，但并不是最好的解决办法，虽然对环信demo的代码改动最少。有更好的办法，欢迎在评论区交流。
(若转载，请告知本人并附上原文链接，谢谢)
