我正在开发一个 TextToSpeech
应用程序。我在 UITextField
中写了一段,然后按下了 Speak 按钮。声音根据 UITextField
中写入的文本播放。
但是,当应用程序处于后台模式时,音频将停止播放。如何在后台模式下继续播放声音?类似于音频播放器如何在后台播放歌曲。
我将以下代码用于文本到语音:
#import "ViewController.h"
#import "Google_TTS_BySham.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()
@property (nonatomic,strong)Google_TTS_BySham *google_TTS_BySham;
@property (nonatomic,strong)IBOutlet UITextField *txtString;
@end
@implementation ViewController
#pragma mark - View Life Cycle
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - Button Tapped event
- (IBAction)btnSpeakTapped:(id)sender{
NSString *str = [NSString stringWithFormat:@"%@",_txtString.text];
self.google_TTS_BySham = [[Google_TTS_BySham alloc] init];
[self.google_TTS_BySham speak:str];
}
最佳答案
在info.plist
文件中添加如下代码...
应用程序不在后台运行:否
所需的后台模式:应用使用 AirPlay 播放音频或流式传输音频/视频
然后在AppDelegate.m
文件中添加如下代码
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
[[AVAudioSession sharedInstance] setDelegate:self];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
UInt32 size = sizeof(CFStringRef);
CFStringRef route;
AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &size, &route);
NSLog(@"route = %@", route);
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)theEvent {
if (theEvent.type == UIEventTypeRemoteControl) {
switch(theEvent.subtype) {
case UIEventSubtypeRemoteControlPlay:
[[NSNotificationCenter defaultCenter] postNotificationName:@"TogglePlayPause" object:nil];
break;
case UIEventSubtypeRemoteControlPause:
[[NSNotificationCenter defaultCenter] postNotificationName:@"TogglePlayPause" object:nil];
break;
case UIEventSubtypeRemoteControlStop:
break;
case UIEventSubtypeRemoteControlTogglePlayPause:
[[NSNotificationCenter defaultCenter] postNotificationName:@"TogglePlayPause" object:nil];
break;
default:
return;
}
}
}
关于ios - 应用程序处于后台模式时的文本转语音功能?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28317036/