Question

任何人都可以告诉我为什么以下代码泄漏？仪器告诉我大约2次泄漏。明显导致泄漏的2条线是：

Person *pers = [[Person alloc] init];

和

NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithContentsOfFile:path];

整体如下：

PersonViewController *personenDatenController = [[PersonViewController alloc]
          initWithStyle:UITableViewStyleGrouped];

personenDatenController.view.backgroundColor = [UIColor clearColor];

 Person *pers = [[Person alloc] init];

 NSString *path = [[self class] pathForDocumentWithName:@"Person.plist"];
 BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:path];
 if (!fileExists) {
  NSLog(@"file does not exist yet");
  NSString *content = @"";
  NSData *fileContents = [content dataUsingEncoding:NSUTF8StringEncoding];
  [[NSFileManager defaultManager] createFileAtPath:path
            contents:fileContents
             attributes:nil];

 }

 NSMutableDictionary *dict = [[NSMutableDictionary alloc] 
         initWithContentsOfFile:path];
 [pers setVorName:[dict valueForKey:@"vorName"]];
 [pers setNachName:[dict valueForKey:@"nachName"]];
 [pers setStrassenName:[dict valueForKey:@"strassenName"]];
 [pers setHausNummer:[dict valueForKey:@"hausNummer"]];
 [pers setPlz:[dict valueForKey:@"plz"]];
 [pers setStadt:[dict valueForKey:@"stadt"]];
 [pers setHandyNummer:(NSInteger*)[dict valueForKey:@"handyNummer"]];
 [pers setEmail:[dict valueForKey:@"email"]];
 [pers setSteuerSatz:[[dict valueForKey:@"steuerSatz"] floatValue]];
 [dict release];


    [personenDatenController setPerson:pers];

    [navigationController pushViewController:personenDatenController animated:YES];

 [personenDatenController release];

    [pers release];

变量“path”来自以下静态方法：

+ (NSString *)pathForDocumentWithName:(NSString *)documentName
{
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *tempPath = [documentsDirectory stringByAppendingPathComponent:documentName];

    return tempPath;
}

提前感谢您的帮助！

亲切的问候

菲尔

Answer 1

假设setPerson调用保留在pers上。你的PersonViewController是否dealloc，在该person对象上调用release？如果是这样，在那里放置一个断点（或NSLog）并找出该人的retainCount。如果不是0，你还可以保留它吗？

Answer 2

谢谢你们的回复。 PersonViewController确实保留了person对象，但我在dealloc中为person对象设置了一个release。零售额还可以。我将Person对象的初始化移动到PersonViewController，现在一切都很好。这对我来说似乎很奇怪。

谢谢

此致

Instruments Leaks在初始化对象时讲述了内存泄漏

2 个答案: