我有一个视图控制器是NSStreamDelegate,当视频从导航控制器弹出而某些内容正在流式传输时出现问题,我得到一个“EXC_BAD_ACCESS”错误。我试图关闭流,但它似乎并没有阻止它,如果有一个流正在进行。处理这个问题的正确方法是什么?如果某些事情正在流传,你能否延缓观点的发作?NSStream在阅读时发布,“EXC_BAD_ACCESS”iPhone SDK
#import "CameraViewer.h"
@implementation CameraViewer
@synthesize camService;
@synthesize currentDownload;
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil theService:(NSNetService *)cameraService {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
// Custom initialization
[self setCamService:cameraService];
}
return self;
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
[self downloadAgain];
}
- (void)viewWillDisappear:(BOOL)animated{
NSLog(@"view is going away");
NSInputStream *istream;
[camService getInputStream:&istream outputStream:nil];
[istream close];
NSLog(@"view is gone");
[super viewWillDisappear:animated];
}
- (void)downloadAgain{
NSInputStream *istream;
[camService getInputStream:&istream outputStream:nil];
[istream retain];
[istream setDelegate:self];
[istream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[istream open];
}
#pragma mark NSStream delegate method
- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)event {
switch(event) {
case NSStreamEventHasBytesAvailable:
NSLog(@"Reading Stream");
if (![self currentDownload]) {
[self setCurrentDownload:[[NSMutableData alloc] initWithCapacity:409600]];
}
uint8_t readBuffer[4096];
int amountRead = 0;
NSInputStream * is = (NSInputStream *)aStream;
amountRead = [is read:readBuffer maxLength:4096];
[[self currentDownload] appendBytes:readBuffer length:amountRead];
//NSLog(@"case 1");
break;
case NSStreamEventEndEncountered:
[(NSInputStream *)aStream close];
UIImage *newImage = [[UIImage alloc] initWithData:[self currentDownload]];
[self setCurrentDownload:nil];
if(newImage != nil){
[imageView setImage:newImage];
}
[newImage release];
[self performSelector:@selector(downloadAgain) withObject:nil afterDelay:0.25];
break;
default:
break;
}
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[[self camService] release];
[[self currentDownload] release];
[super dealloc];
}
@end
发布您的代码。 – 2010-10-18 19:08:11
我发布了代码。 – Matt 2010-10-19 00:50:47