Ios 如何通过编程将噪波从另一个ViewController中的UITableView分配给按钮？

我有一组声音填充了一个TableView。当用户选择其中一个时，我希望将该声音分配给另一个视图控制器中的按钮。该视图控制器当前正在使用分配给按钮的“默认”声音。最好的方法是什么

编辑我已编辑以显示所做的更改，但似乎仍然不起作用。有什么想法吗

pickSound.m

@interface pickSound ()

@end

@implementation pickSound

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.titleObjectsArray = @[@"Horn", @"Dog Barking", @"Whistle", @"Funny Noises",];

    self.soundObjectsArray = @[@"horn.wav", @"bark1.wav", @"whistle.wav", @"funny.wav",];
    // Do any additional setup after loading the view.
}

-(void)viewDidAppear: (BOOL)animated{

    [self.navigationController setNavigationBarHidden:NO animated:YES];
    [super viewWillAppear:YES];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    // Return the number of rows in the section.
    return [self.titleObjectsArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier =@"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    UIButton *previewSound = [[UIButton alloc]init];
    UIImage *btnImage = [UIImage imageNamed:@"PlayButtonPNG.png"];
    [previewSound setImage:btnImage forState:UIControlStateNormal];
    cell.textLabel.text = [self.titleObjectsArray objectAtIndex:indexPath.row];

    return cell;
}

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

if(indexPath.row ==0)
{
    sound = @"Horn";
}

}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([segue.identifier isEqual:@"pickedSound"]) {
        ViewController *cameraVC = (ViewController *)segue.destinationViewController;
        cameraVC.soundId = sound;
    }
}

- (IBAction)playSound:(id)sender {
    if ([selectedSound isEqualToString:@"Horn"]) {
        NSURL *makeNoiseURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@"horn" ofType:@".wav"]];
        AudioServicesCreateSystemSoundID((__bridge CFURLRef)makeNoiseURL, &SoudId);
        AudioServicesPlaySystemSound(SoudId);

    } else if ([selectedSound isEqualToString:@"Dog Barking"]) {
        NSURL *makeNoiseURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@"bark1" ofType:@".wav"]];
        AudioServicesCreateSystemSoundID((__bridge CFURLRef)makeNoiseURL, &SoudId);
        AudioServicesPlaySystemSound(SoudId);
    }


}

ViewController.m（播放声音的按钮所在位置）

#导入“ViewController.h”
#导入“pictureViewController.h”
#进口
@界面视图控制器（）
@结束
@合成声音；
@实现视图控制器
-（无效）viewDidLoad
{
[超级视图下载]；
//加载视图后，通常从nib执行任何其他设置。
self.soundId=soundId；
if（[soundId isEqualToString:@“horn”]）{
NSURL*makeNoiseURL=[NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@.wav“]类型的“horn”；
AudioServicesCreateSystemSoundID（（uu桥CFURLRef）makeNoiseURL和SoudID）；
}否则{
NSURL*makeNoiseURL=[NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@.wav“]类型的“horn”；
AudioServicesCreateSystemSoundID（（uu桥CFURLRef）makeNoiseURL和SoudID）；
}
}
-（iAction）makeNoise:（id）发送方{
AudioServicesPlaySystemSound（SoudID）；
}

在ViewController类中创建一个NSString属性，并在TableView中进行选择时进行设置。从viewDidLoad中删除硬编码的资源加载，并将此属性用作资源名称。

我找到了它。我创建了一个NSString，它被指定了所选行的值。使用prepareforsegue将该字符串传递给第二个VC。使用if语句根据NSString sound为按钮指定要播放的声音

**皮克桑德**

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    self.selectedIndexPath = [self.titleObjectsArray objectAtIndex:indexPath.row];

    if ([self.selectedIndexPath isEqual:@"Horn"]) {
        sound = @"Horn";
    } else if ([self.selectedIndexPath isEqual: @"Dog Barking"]) {
        sound = @"Dog Barking";
    }

    [self performSegueWithIdentifier:@"newVC" sender:self];
}

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    DestinationVC *controller = segue.destinationViewController;
    controller.selectedSound = sound;
}

viewcontroller.m

@interface pickSound ()

@end

@implementation pickSound

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.titleObjectsArray = @[@"Horn", @"Dog Barking", @"Whistle", @"Funny Noises",];

    self.soundObjectsArray = @[@"horn.wav", @"bark1.wav", @"whistle.wav", @"funny.wav",];
    // Do any additional setup after loading the view.
}

-(void)viewDidAppear: (BOOL)animated{

    [self.navigationController setNavigationBarHidden:NO animated:YES];
    [super viewWillAppear:YES];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    // Return the number of rows in the section.
    return [self.titleObjectsArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier =@"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    UIButton *previewSound = [[UIButton alloc]init];
    UIImage *btnImage = [UIImage imageNamed:@"PlayButtonPNG.png"];
    [previewSound setImage:btnImage forState:UIControlStateNormal];
    cell.textLabel.text = [self.titleObjectsArray objectAtIndex:indexPath.row];

    return cell;
}

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

if(indexPath.row ==0)
{
    sound = @"Horn";
}

}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([segue.identifier isEqual:@"pickedSound"]) {
        ViewController *cameraVC = (ViewController *)segue.destinationViewController;
        cameraVC.soundId = sound;
    }
}

- (IBAction)playSound:(id)sender {
    if ([selectedSound isEqualToString:@"Horn"]) {
        NSURL *makeNoiseURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@"horn" ofType:@".wav"]];
        AudioServicesCreateSystemSoundID((__bridge CFURLRef)makeNoiseURL, &SoudId);
        AudioServicesPlaySystemSound(SoudId);

    } else if ([selectedSound isEqualToString:@"Dog Barking"]) {
        NSURL *makeNoiseURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@"bark1" ofType:@".wav"]];
        AudioServicesCreateSystemSoundID((__bridge CFURLRef)makeNoiseURL, &SoudId);
        AudioServicesPlaySystemSound(SoudId);
    }


}

---

我想我明白你在说什么，但由于某种原因，我做这件事时无法播放声音。见上面编辑的文章。有什么想法吗？在你的prepareForSegue方法中，设置一个断点，看看你是否在声音变量中得到了正确的值。在ViewController类中，不需要这行代码“self.soundID=soundID”，因为您已经从源类中设置了此属性。放置一个断点并检查数据是否正确。我看到您只为第一行硬编码了它（索引0）。确保你在正确的一排。