本算法实现了微信的语音连播功能：即自动读取本条之后的未读语音消息；连播一般都是一条播放完成，在接着播放下一条。
- (void)clickCellVoice:(VMessageEntity *)model
{
__weak VChatsViewController *weakSelf = self;
if ([self.keyBoardView isFirstResponder])
{
[self tapAnywhereToDismissKeyboard:nil];
}
if (model)
{
model.readStatus = VMessageHaveRead;
VChatVoiceBaseCell *voiceCell = nil;
for (UITableViewCell *cell in [_tableView visibleCells]) {
if ([cell isKindOfClass:[VChatVoiceBaseCell class]]) {
VChatVoiceBaseCell *tempVoiceCell =(VChatVoiceBaseCell *)cell;
if ( tempVoiceCell.message.messageId == model.messageId) {
voiceCell = (VChatVoiceBaseCell *)cell;
break;
}
}
}
if (voiceCell)
{
if (![[VAudioPalyerManager sharedManager] isPlaying]) {
[voiceCell.playIcon startAnimating];
model.voiceMessage.isPlaying = YES;
[[VAudioPalyerManager sharedManager] playWithfile:model.voiceMessage.voicemd5 finishPlaying:^(NSString *fileName,BOOL isFinished) {
[voiceCell.playIcon stopAnimating];
model.voiceMessage.isPlaying = NO;
if (isFinished) {
if (model.messageStatus == VMessageStatusNone)
{
[weakSelf playNextUnReadVoiceWithMessageEntity:model];
}
}
}];
}else if([[VAudioPalyerManager sharedManager]isPlaying] &&![model.voiceMessage.voicemd5 isEqualToString:[[VAudioPalyerManager sharedManager] currentFileName]]) //如果正在播放，且与当前的文件名不同，停止播放当前的播放效果，播放另外一条。
{
[[VAudioPalyerManager sharedManager] stop];
[voiceCell.playIcon startAnimating];
model.voiceMessage.isPlaying = YES;
[[VAudioPalyerManager sharedManager] playWithfile:model.voiceMessage.voicemd5 finishPlaying:^(NSString *fileName, BOOL isFinish) {
[voiceCell.playIcon stopAnimating];
model.voiceMessage.isPlaying = NO;
if (isFinish) {
if (model.messageStatus == VMessageStatusNone)
{
[weakSelf playNextUnReadVoiceWithMessageEntity:model];
}
}
}];
}else if([[VAudioPalyerManager sharedManager]isPlaying] && [model.voiceMessage.voicemd5 isEqualToString:[[VAudioPalyerManager sharedManager] currentFileName]]) // 处理当前正在播放的语音，停止当前的语音播放
{
[[VAudioPalyerManager sharedManager] stop];
model.voiceMessage.isPlaying = NO;
if([voiceCell.playIcon isAnimating])
{
[voiceCell.playIcon stopAnimating];
}
}
}
}
}
//递归查找下一条未读语音消息
- (void)playNextUnReadVoiceWithMessageEntity:(VMessageEntity *)model
{
//找到message在chatArray里面的位置
__weak VChatsViewController *weakSelf = self;
if (model) {
NSIndexPath *index = [NSIndexPath indexPathForRow:[self.messageArray indexOfObject:model] inSection:0];
if (index)
{
for (NSInteger i = index.row+1; i < self.messageArray.count; i++) {
id tempObj = self.messageArray[i];
if ([tempObj isKindOfClass:[VMessageEntity class]])
{
VMessageEntity *messageEntity = (VMessageEntity *)tempObj;
if (messageEntity.messageType == VMessageTypeVoice && messageEntity.messageStatus == VMessageStatusNone)
{//判断是语音消息
if (messageEntity.readStatus == VMessageNoRead)
{
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
//取到下一条的cell
VChatVoiceReceiveCell *voiceBaseCell = nil;
for (UITableView *cell in [_tableView visibleCells]) {
if ([cell isKindOfClass:[VChatVoiceReceiveCell class]]) {
VChatVoiceReceiveCell *tempBaseCell = (VChatVoiceReceiveCell *)cell;
if (tempBaseCell.message.messageId == messageEntity.messageId) {
voiceBaseCell = (VChatVoiceReceiveCell *)cell;//找到cell
}
}
}
//找到cell，更新UI
[voiceBaseCell.playIcon startAnimating];
//更新数据库消息的未读状态,去掉未读标记
[voiceBaseCell receiveVoiceCellBeClick];
//更新数据库
[[VMessageManager sharedManager] updateReadStatusWithClientMessageId:messageEntity.clientMessageId readStatus:VMessageHaveRead userId:messageEntity.sendUserId];
messageEntity.readStatus = VMessageHaveRead;
[weakSelf.messageArray replaceObjectAtIndex:i withObject:messageEntity];
//进行播放
messageEntity.voiceMessage.isPlaying = YES;
[[VAudioPalyerManager sharedManager] playWithfile:messageEntity.voiceMessage.voicemd5 finishPlaying:^(NSString *fileName, BOOL isFinish) {
[voiceBaseCell.playIcon stopAnimating];
messageEntity.voiceMessage.isPlaying = NO;
if (isFinish) {
if (model.messageStatus == VMessageStatusNone)
{
//isFinish == yes 则完整播放,再次调用这个方法
[weakSelf playNextUnReadVoiceWithMessageEntity:model];
}
}
}];
});
break;
}
}
}else{
NSLog(@"不是消息类型");
}
}
}
}
}