ios - AVAudioPlayer 不播放声音 IOS

Question

早上好

我有以下 iphone 应用程序，它使用 googleTTS 将字符串转换为音频，但实际上无法播放下载的数据。谁能帮我弄清楚为什么我听不到任何声音。

viewcontroller.h

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import "RJGoogleTTS.h"


@interface ViewController : UIViewController <CLLocationManagerDelegate>

@property (weak, nonatomic) IBOutlet UILabel *userLabel;
@property (strong, nonatomic) CLLocationManager *locationManager;
@property (strong, nonatomic) CLGeocoder *geoCoder;

@property (strong, nonatomic) RJGoogleTTS *googleTTS;

- (IBAction)geoCodeLocation:(id)sender;

- (IBAction)rjGoogleButton:(id)sender;
@end

viewcontroller.m

- (IBAction)rjGoogleButton:(id)sender {

    googleTTS = [[RJGoogleTTS alloc]init];

    [googleTTS convertTextToSpeech:@"How are you today user?"];

}

rjgoogletts.h

#import <Foundation/Foundation.h>

@protocol RJGoogleTTSDelegate <NSObject>

@required
- (void)receivedAudio:(NSMutableData *)data;
- (void)sentAudioRequest;

@end

@interface RJGoogleTTS : NSObject {
    id <RJGoogleTTSDelegate> delegate;
    NSMutableData *downloadedData;
}

@property (nonatomic, retain) id <RJGoogleTTSDelegate> delegate;
@property (nonatomic, retain) NSMutableData *downloadedData;

- (void)convertTextToSpeech:(NSString *)searchString;

@end

rjgoogletts.m

#import "RJGoogleTTS.h"
#import <AVFoundation/AVFoundation.h>

@implementation RJGoogleTTS
@synthesize delegate, downloadedData;

- (id)init
{
    self = [super init];
    if (self) {
        // Initialization code here.
    }

    return self;
}

- (void)convertTextToSpeech:(NSString *)searchString {

    //NSString *search = [NSString stringWithFormat:@"http://translate.google.com/translate_tts?q=%@", searchString];
    NSString *search = [NSString stringWithFormat:@"http://translate.google.com/translate_tts?tl=en&q=%@", searchString];

    search = [search stringByReplacingOccurrencesOfString:@" " withString:@"%20"];
    NSLog(@"Search: %@", search);
    self.downloadedData = [[NSMutableData alloc] initWithLength:0];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:search]];
    [request setValue:@"Mozilla/5.0" forHTTPHeaderField:@"User-Agent"];
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
    //[delegate sentAudioRequest];




}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    NSLog(@"did you receive response user");
    [self.downloadedData setLength:0];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    NSLog(@"did you receive data user");
    [self.downloadedData appendData:data];



}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    NSLog(@"Failure");
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

    NSLog(@"it worked user!!!");
    [delegate receivedAudio:self.downloadedData];
    NSLog(@"here are the bytes downloaded, %d", [self.downloadedData length]);


    NSString *txt = [[NSString alloc] initWithData:downloadedData encoding: NSASCIIStringEncoding];
    NSLog(@"%@hello",txt);

    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc]initWithData:self.downloadedData error:nil];
    [audioPlayer prepareToPlay];
    [audioPlayer play];

}

@end

Answer 1

您在使用 ARC 吗？如果是这样，您将需要保留音频，这样它就不会自动设置为 nil，将以下属性添加到 rjgoogleetts 的头文件中，瞧!@property (nonatomic, strong) AVAudioPlayer *audioPlayer;希望这可以帮助。吉姆