好的,我遇到了一个内存管理问题,它将我推上了一堵墙。有一次,我发誓这没有问题,但现在它泄漏内存到处都是,我找不出原因。难以忍受OS X的内存泄漏应用程序
首先我开始一个NSTask,然后在任务运行时运行一个循环。
NSTask *encodingTask = [[NSTask alloc] init];
NSFileHandle *taskStdout = [NSFileHandle fileHandleForWritingAtPath:encodingOutput];
[encodingTask setStandardOutput:taskStdout];
[encodingTask setStandardError:taskStdout];
NSString argString = [NSString stingWithString: @"some arguments"];
[encodingTask setArguments:taskArgs];
[encodingTask setLaunchPath:somePath];
[encodingTask launch];
while ([encodingTask isRunning]){
sleep(1);
[self encodeProgressTimer];
}
的encodeProgessTimer方法抓住从标准输出的最后一行,并把在菜单栏:
- (void)encodeProgressTimer
{
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"menuProgress"]) {
// Read the last line
NSString *fileData = [NSString stringWithContentsOfFile:encodingOutput encoding:NSASCIIStringEncoding error:nil];
NSArray *lines = [fileData componentsSeparatedByString:@"\r"];
NSString *lastLine = [lines objectAtIndex:[lines count] - 1];
NSString *percent;
NSString *eta;
BOOL dataFound = NO;
if ([lastLine length] == 71) {
dataFound = YES;
percentRange = (NSRange) {23,5};
etaRange = (NSRange) {61,9};
percent = [lastLine substringWithRange:percentRange];
eta = [lastLine substringWithRange:etaRange];
}
else if ([lastLine length] == 72) {
dataFound = YES;
percentRange = (NSRange) {23,5};
etaRange = (NSRange) {62,9};
percent = [lastLine substringWithRange:percentRange];
eta = [lastLine substringWithRange:etaRange];
}
else if ([lastLine length] == 70) {
dataFound = YES;
percentRange = (NSRange) {23,5};
etaRange = (NSRange) {60,9};
percent = [lastLine substringWithRange:percentRange];
eta = [lastLine substringWithRange:etaRange];
}
if (dataFound) {
NSMutableString *bottomStr = [[NSMutableString alloc]
initWithFormat:@"Encoding: %@%% - ETA %@", percent, eta];
[appDelegate setMenuTop:topString andBottom:bottomStr];
[bottomStr release];
}
}
}
这是我的理解是什么,我没有具体分配和初始化应该在方法完成时自动释放,但事实并非如此。当被调用时,内存使用量每秒呈指数增长。如果我看看我的记忆分配,那么活着的CFstings的数量将通过屋顶。如果我打开encodeProgressTimer,我的问题就会消失。我尝试添加一个自动释放池来编码使内存使用非常稳定的ProgressTimer,但是在运行20分钟左右后,我得到一个EXC_BAD_ACCESS。打开僵尸原来是成:
*** -[NSConcreteAttributedString _drawCenteredVerticallyInRect:scrollable:]: message sent to deallocated instance 0x2bc756e0
其实我去通过,并改变每个变量声明为它分配/初始化配对,并手动将其释放,但它还是不解决问题。在这一点上,我很难过。
而且为了完整起见,[的appDelegate setMenuTop:andBottom:]方法是这样的:
-(void) setMenuTop: (NSString *) top andBottom: (NSString *) bottom
{
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"menuProgress"]) {
[statusItem setImage:nil];
NSMutableParagraphStyle *lineHeight = [[NSMutableParagraphStyle alloc] init];
[lineHeight setMaximumLineHeight:10.5];
[lineHeight setLineBreakMode:NSLineBreakByTruncatingMiddle];
OperationQueue *opQueue = [OperationQueue sharedQueue];
NSString *sBuffer = [[NSMutableString alloc] initWithFormat: @"%@ (%i More)\n%@", top, [opQueue queueCount] - 1, bottom];
attributes = [[NSDictionary alloc] initWithObjectsAndKeys:[NSFont menuFontOfSize:9], NSFontAttributeName, lineHeight, NSParagraphStyleAttributeName, nil];
if (statusTitle)
[statusTitle release];
statusTitle = [[NSAttributedString alloc] initWithString: sBuffer attributes: attributes];
[statusItem setAttributedTitle: statusTitle];
[lineHeight release];
[sBuffer release];
[attributes release];
}
}
这就是它!当我把NSAutoReleasePool放入并且仍然崩溃时,我认为它仍然是一个内存管理问题。原来我还需要在主线程中运行状态栏更新。现在一切似乎都顺利运行,非常感谢! – Kris