在应用程序中使用声音[关闭]

Question

我正在开发一个小应用程序，在这个应用程序中，必须有一个可以说一些话的声音。

我可以使用某些程序使用的语音，例如“Google Translate”、“Vozme”或类似的吗？如果没有，我该怎么做？

Answer 1

AVSpeechSynthesizer Class Reference 在 iOS7 中可用。文档非常好。请务必将 AVFoundation 框架链接到您的项目。

这是一个工作示例，当轻按 UIButton 时，它会说出从 UITextField 输入的文本 - （假设 UIViewController 子类名为 YOURViewController)

在.h中

#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>

@interface YOURViewController : UIViewController <AVSpeechSynthesizerDelegate, UITextFieldDelegate> {
    IBOutlet UITextField *textFieldInput;// connect to a UITextField in IB
}

- (IBAction)speakTheText:(id)sender;// connect to a UIButton in IB

@end

在.m中

#import "YOURViewController.h"

@interface YOURViewController ()

@end

@implementation YOURViewController

- (IBAction)speakTheText:(id)sender {
    // create string of text to talk
    NSString *talkText = textFieldInput.text;
    // convert string
    AVSpeechUtterance *speechUtterance = [self convertTextToSpeak:talkText];
    // speak it...!
    [self speak:speechUtterance];
}

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (AVSpeechUtterance*)convertTextToSpeak:(NSString*)textToSpeak {
    AVSpeechUtterance *speechUtterance = [[AVSpeechUtterance alloc] initWithString:textToSpeak];
    speechUtterance.rate = 0.2; // default = 0.5 ; min = 0.0 ; max = 1.0
    speechUtterance.pitchMultiplier = 1.0; // default = 1.0 ; range of 0.5 - 2.0
    speechUtterance.voice = [self customiseVoice];
    return speechUtterance;
}

- (AVSpeechSynthesisVoice*)customiseVoice {
    NSArray *arrayVoices = [AVSpeechSynthesisVoice speechVoices];
    NSUInteger numVoices = [arrayVoices count];
    AVSpeechSynthesisVoice *voice = nil;

    for (int k = 0; k < numVoices; k++) {
        AVSpeechSynthesisVoice *availCustomVoice = [arrayVoices objectAtIndex:k];
        if ([availCustomVoice.language  isEqual: @"en-GB"]) {
            voice = [arrayVoices objectAtIndex:k];
        }
// This logs the codes for different nationality voices available
// Note that the index that they appear differs from 32bit and 64bit architectures
        NSLog(@"#%d %@", k, availCustomVoice.language);
    }
    return voice;
}

- (void)speak:(AVSpeechUtterance*)speechUtterance {
    AVSpeechSynthesizer *speechSynthesizer = [[AVSpeechSynthesizer alloc] init];
    speechSynthesizer.delegate = self;// all methods are optional
    [speechSynthesizer speakUtterance:speechUtterance];
}

@end