等待 AVSpeechSynthesiser 完成发音

Question

我正在编写一个应用程序，允许用户在听到他们想要关注的网络 link 时按下按钮。

问题是我正在使用的 for 循环将所有文本添加到话语列表中，并且在继续之前不等待话语完成，这意味着我无法分辨是什么 link他们想跟随。

我有一个 class 叫

Speech

它是 AVSpeechSynthesiser 的代表，并尝试创建我自己的方式来确定话语何时结束：

-(id)init {
self = [super init];
if (self) {
    _synthesiser = [[AVSpeechSynthesizer alloc]init];
    [self setSpeaking:NO];
}
return self; 
}

-(void)outputAsSpeech:(NSString *)text
{
[self setSpeaking:YES];
[[self synthesiser]speakUtterance:[[AVSpeechUtterance alloc]initWithString:text]];
}

-(BOOL)isSpeaking
{
return [self speaking];
}

-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance
{
[self setSpeaking:NO];
}

并且在 class

viewController

-(void)readBookmarks
{
[[self speech]continueSpeech];
[[self speech]outputAsSpeech:@"Bookmarks,"];
for ([self bookmarksPointer]; [self bookmarksPointer] < [[self bookmarks]count]; _bookmarksPointer++) {
    NSDictionary* dictionary = [[self bookmarks]objectAtIndex:[self bookmarksPointer]];
    [[self speech]outputAsSpeech:[dictionary objectForKey:@"title"]];
    while ([[self speech]isSpeaking]) {}
    }
}

我们的想法是应用程序应该等到话语发生后再继续。但是此刻它读出"Bookmarks,"就停止了，它甚至没有读出第一个书签，我也试过把while循环放在for循环的开头。

谁能帮帮我，我将不胜感激。

谢谢

Answer 1

因此，在竭尽全力寻找答案后，我意识到我没有将合成器的委托设置为 'self'。（我讨厌我自己！）

但是，这并没有解决我的问题，出于某种原因，这仍然不起作用。我发现 speechSynthesiser:didFinishSpeakingUtterance: 从未被调用过。

因此，我向 Speech 对象发送了一个我希望它说出的字符串数组，并在该对象中跟踪它们，然后我添加了一个方法 return 文本数组中的位置合成器当前正在说的是：

Speech

-(id)init
{
self = [super init];

if (self) {
    _synthesiser = [[AVSpeechSynthesizer alloc]init];
    [[self synthesiser]setDelegate:self];
    [self setSpeaking:NO];
    }
return self;
}

-(void)outputAsSpeech:(NSArray*)textArray
{
[self setTextToBeSpoken:textArray];
[self setArrayPointer:0];
[[self synthesiser]speakUtterance:[[AVSpeechUtterance alloc]initWithString:[[self textToBeSpoken]objectAtIndex:[self arrayPointer]]]];
}

-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance
{
_arrayPointer++;
if ([self arrayPointer] < [[self textToBeSpoken]count]) {
    [[self synthesiser]speakUtterance:[[AVSpeechUtterance alloc]initWithString:[[self textToBeSpoken]objectAtIndex:[self arrayPointer]]]];
    }
}

-(int)stringBeingSpoken
{
return [self arrayPointer];
}

viewController

-(void)readBookmarks
{
[[self speech]continueSpeech];
NSMutableArray* textToSpeak = [[NSMutableArray alloc]init];
for (int i = 0; i < [[self bookmarks]count]; i++) {
    NSDictionary* dictionary = [[self bookmarks]objectAtIndex:i];
    NSString* textToRead = [dictionary objectForKey:@"title"];
    [textToSpeak addObject:textToRead];
    }
[[self speech]outputAsSpeech:textToSpeak];
}

-(void)currentlyBeingSpoken
{
    NSDictionary* dictionary = [[self bookmarks]objectAtIndex:[[self speech]stringBeingSpoken]];
    NSLog([dictionary objectForKey:@"title"]);
}

等待 AVSpeechSynthesiser 完成发音

Wait for AVSpeechSynthesiser to finish utterance

ios

avspeechsynthesizer