Question

@implementation MyClass

-(id) init
{
    NSString *path0 = [ [NSBundle mainBundle] pathForResource:@"myfile" ofType:@"m4a" ];
    mSound = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:path0] error:NULL]; 
    mSound.delegate = self;  
}

-(void) release 
{

    mSound.delegate = nil;  //<- this line causes MyClass release function to be called recursively
   [ mSound release ];      //<- removing the line above makes this line do the same, i.e. calls myclass release recursively  
}

似乎释放AvAudioPlayer也释放了委托对象，我试图在将其分配给委托时手动调用retain，但它没有帮助。

即使我做了类似的事情：

-(id) init
{
    NSString *path0 = [ [NSBundle mainBundle] pathForResource:@"myfile" ofType:@"m4a" ];
    mSound = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:path0] error:NULL]; 
    mSound.delegate = self; 
    mSound.delegate = nil;  //<- (just for test), causes MyClass release to be invoked,    
}

当我将委托分配给nil时，我会立即释放要从init调用的Myclass

有什么想法吗？

Answer 1

通常，代表不会保留，只能分配。代表应保留在其他地方。除此之外，这可以保持周期不发生。

AvAudioPlayer设置委托给nil释放委托对象？

1 个答案: