使用 @protocol 从 UITableViewController 控制音频与主视图控制器？
好的，这是场景：
我正在使用 AVAudioPlayer。
我正在尝试从 UITableView 中选择并播放一首歌曲，该歌曲显示为弹出窗口。
mp3 资源位于我的文档目录中。
我可以填充表格视图，当我选择一行时，播放该特定资产。
我无法做的是在弹出窗口消失后使用主视图控制器上的控件控制音频。 （播放/停止/音量）
我有@protocol，它使弹出窗口成为委托，任何人都可以帮助我了解我的协议中的方法的语法吗？
@protocol SongChooserDelegate
-(void) didTap:(NSData *) 数据； <------------ 我在这里猜测
@end
如果这不起作用-什么可以？
谢谢，任何帮助将不胜感激......这是我为星期五到期的高级论文构建应用程序的最后一步！哎呀。
Ok here's the scenario:
I am using AVAudioPlayer.
I am trying to select and play a song from UITableView which appears as a popover.
The mp3 assets are located in my documents directory.
I can populate the table view and when I select a row, play that specific asset.
What I can not do is control the audio once the popover has disappeared with the controls that are on my main view controller. (play/stop/volume)
I have @protocol which makes the popover a delegate, can any one help me with the syntax of the method that would go in my protocol?
@protocol SongChooserDelegate
-(void) didTap:(NSData *) data; <------------ I'm guessing here
@end
If this won't work - what will?
Thank you, any help would be greatly appreciated.... this is my last step in building my app for my senior thesis due Friday!!!!! eeeek.
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我花了一段时间，但我终于弄清楚了：
如果有人想要解释或所有代码，请告诉我。
//UITableViewController.h
@protocol SongChooserDelegate
-(void) didTap:(NSURL *)songUrl;
@end
//UITableView.m
(void)viewDidLoad
{
[self.playerprepareToPlay];
// 指向文档目录
NSString *path = [NSHomeDirectory()
stringByAppendingPathComponent:@"文档"];
NSError *错误= nil;
NSArray *array = [[NSFileManager defaultManager]
contentOfDirectoryAtPath:路径错误:&错误];
如果（数组==零）{
// 处理错误
}
self.songs = 数组；
[super viewDidLoad];
}
(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UIAlertView *showSelection;
NSString *消息；
消息 = [[NSString alloc] initWithFormat:@"%@",
[歌曲objectAtIndex:indexPath.row]];
showSelection = [[UIAlertView 分配]
initWithTitle:@"跟踪选定的" 消息:消息委托:nil
cancelButtonTitle:@"确定" otherButtonTitles:nil];
[显示选择显示]；
[showSelection发布]；
[消息发布]；
NSString *applicationDocumentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [applicationDocumentsDirectory stringByAppendingPathComponent: [歌曲 objectAtIndex:indexPath.row]];
NSURL *url = [NSURL fileURLWithPath:filePath];
[self.delegate didTap:url];
}
//ViewController.h
@interface ViewController : UIViewController < SongChooserDelegate、AVAudioPlayerDelegate >
//ViewController.m
-(void) didTap:(NSURL *)songUrl{
[播放器prepareToPlay];
}
It took me a while, but I figured this out finally:
If any one wants and explanation or all the code, let me know.
//UITableViewController.h
@protocol SongChooserDelegate
-(void) didTap:(NSURL *)songUrl;
@end
//UITableView.m
(void)viewDidLoad
{
[self.player prepareToPlay];
// Point to Document directory
NSString *path = [NSHomeDirectory()
stringByAppendingPathComponent:@"Documents"];
NSError *error = nil;
NSArray *array = [[NSFileManager defaultManager]
contentsOfDirectoryAtPath:path error:&error];
if (array == nil) {
// Handle the error
}
self.songs = array;
[super viewDidLoad];
}
(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UIAlertView *showSelection;
NSString *message;
message = [[NSString alloc] initWithFormat:@"%@",
[songs objectAtIndex:indexPath.row]];
showSelection = [[UIAlertView alloc]
initWithTitle:@"Track Selected" message:message delegate:nil
cancelButtonTitle:@"OK" otherButtonTitles:nil];
[showSelection show];
[showSelection release];
[message release];
NSString *applicationDocumentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [applicationDocumentsDirectory stringByAppendingPathComponent: [songs objectAtIndex:indexPath.row]];
NSURL *url = [NSURL fileURLWithPath:filePath];
[self.delegate didTap:url];
}
//ViewController.h
@interface ViewController : UIViewController < SongChooserDelegate, AVAudioPlayerDelegate >
//ViewController.m
-(void) didTap:(NSURL *)songUrl{
[player prepareToPlay];
}