我想通过使用委托来停止从另一个视图播放我的音乐。我已经有了那个设置，我知道有这个选项......
- (void)viewWillDisappear:(BOOL)animated{
[player stop]; ///(my players name here and command to stop the player)
}
但是我不想使用该功能，因为我一直在播放音乐。我已经添加了代码以确保我的播放器不会重叠。但是当我确实想停止我的音乐时，我想以不同的方式这样做。我在'[player stop];'调用委托时尝试了该功能，但它不起作用。
任何人都可以帮忙吗？先谢谢了...
编辑
这是我的选项 PAGE.H 文件的代码：
@protocol onHandlerDelegate <NSObject>
- (void)off:(BOOL)success;
- (void)on:(BOOL)success;
-(void)volumeValueChange:(UISlider *)sender;
@end
#import <UIKit/UIKit.h>
@interface OptionsPage : UIViewController{
IBOutlet UISlider *VolumeSlider;
NSTimer *VolumeTimer;
IBOutlet UISwitch *onoroffmusic;
}
-(IBAction) UIBarButtonItem:(id)sender;
-(IBAction) SwitchMusic:(id)sender;
-(IBAction)changevolume:(id)sender;
@property (nonatomic, retain) UISwitch *onoroffmusic;
@property (nonatomic, strong) id<onHandlerDelegate> delegatePpty1;
@end
这是我的选项页面 .M 文件：
#import "OptionsPage.h"
#import "ViewController.h"
@interface OptionsPage ()
@end
@implementation OptionsPage
@synthesize onoroffmusic;
@synthesize delegatePpty1;
- (IBAction)changevolume:(id)sender{
int volume = VolumeSlider.value;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:[NSNumber numberWithInt:volume] forKey:@"volume"];
[defaults synchronize];
[[self delegatePpty1]volumeValueChange:(VolumeSlider)];
}
-(IBAction) SwitchMusic:(id)sender{
if (onoroffmusic.on) {
[[self delegatePpty1] on:YES];
printf("done");
onoroffmusic.on = YES;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults removeObjectForKey:@"off"];
[defaults setObject:[NSNumber numberWithBool:YES] forKey:@"on"];
[defaults synchronize];
}
else {
/// do nothing
[[self delegatePpty1] off:YES];
printf("off");
onoroffmusic.on = NO;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults removeObjectForKey:@"on"];
[defaults setObject:[NSNumber numberWithBool:YES] forKey:@"off"];
[defaults synchronize];
ViewController *home = [[ViewController alloc] initWithNibName:nil bundle:nil];
[home.player stop];
}
}
-(IBAction) UIBarButtonItem:(id)sender{
ViewController *Backbutton = [[ViewController alloc] initWithNibName:nil bundle:nil];
[self presentViewController:Backbutton animated:YES completion:nil];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad{
VolumeSlider.value = 0.3;
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSObject * object = [prefs valueForKey:@"volume"];
if(object == nil){
VolumeSlider.value = 0.3;
}
else{
VolumeSlider.value = [[[NSUserDefaults standardUserDefaults] objectForKey:@"volume"] intValue];
}
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
NSUserDefaults *defaults2 = [NSUserDefaults standardUserDefaults];
BOOL restoredBoolValue2 = [[defaults2 objectForKey:@"off"] boolValue];
BOOL restoredBoolValue1 = [[defaults2 objectForKey:@"on"] boolValue];
if (restoredBoolValue2) {
////donothing
onoroffmusic.on = FALSE;
}
if (restoredBoolValue1) {
////donothing
onoroffmusic.on = TRUE;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
在这两个文件中，我声明了一个委托和我的开关。现在只是在我的视图控制器中接收该委托：
我的 VIEWCONNTROLLER .H 文件：
#import "OptionsPage.h"
@interface ViewController : UIViewController <onHandlerDelegate>{
AVAudioPlayer *player;
}
@property (nonatomic, retain) AVAudioPlayer *player;
@end
这是我的 .M 文件：
首先我
@synthesize player;
然后使用以下命令检查我的代表是否已被调用：
-(void)volumeValueChange:(UISlider *)sender
{
if (sender.value > 0.3) {
player.volume = sender.value;
}
else{
player.volume = 0.3;
}
}
-(void)on:(BOOL)success{
NSLog(@"Delegate Method Called");
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:[NSNumber numberWithBool:YES] forKey:@"mykey1"];
[self play];
[player play];
}
-(void)off:(BOOL)success{
NSLog(@"Delegate Method Called");
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults removeObjectForKey:@"mykey1"];
[defaults setObject:[NSNumber numberWithBool:YES] forKey:@"mykey"];
[player stop];
player = nil;
[defaults removeObjectForKey:@"music"];
}
然后我使用这个加载boolmy 的值：nsuserdefults
- (void)viewDidLoad
{
if ([[NSUserDefaults standardUserDefaults] stringForKey:@"mykey"] == nil ) {
if ([[NSUserDefaults standardUserDefaults] stringForKey:@"music"] == nil) {
[self play];
}
}
}
NSUserDefaults *defaults2 = [NSUserDefaults standardUserDefaults];
BOOL restoredBoolValue2 = [[defaults2 objectForKey:@"mykey"] boolValue];
if (restoredBoolValue2) {
////donothing
[player stop];
}
BOOL restoredBoolValue1 = [[defaults2 objectForKey:@"mykey1"] boolValue];
if (restoredBoolValue1){
[self play];
}
我有我的游戏void功能
-(void)play{
if ([[NSUserDefaults standardUserDefaults] stringForKey:@"music"] == nil) {
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/Music.mp3", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
player.numberOfLoops = -1;
[player play];
player.volume = 0.3;
player.currentTime = 0.0;
[[NSUserDefaults standardUserDefaults] setObject:@"-" forKey:@"music"];
}
else {
[player stop];
}
}
最后在我的应用程序 delegate.m 文件中我：
- (void)applicationDidEnterBackground:(UIApplication *)application
{
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
[[NSUserDefaults standardUserDefaults] setObject:nil forKey:@"music"];
}