UISwitch 的静态分析器内存泄漏警告

Question

我有以下代码，其中每个对象都是 UISwitch IBOutlet 属性。我不确定为什么在使用 xcode 分析器时每行都会收到内存泄漏警告。

- (IBAction)copyEntirePreviousNoteButtonClicked:(id)sender
{
    self.myUISwitch1.on = TRUE;
    self.myUISwitch2.on = TRUE;
}

- (IBAction)updateButtonClicked:(id)sender
{
    NSMutableDictionary *copyOptions = [[[NSMutableDictionary alloc] init] autorelease];

    if (self.myUISwitch1.on) {
        [copyOptions setValue:@"ON" forKey:@"myUISwitch1"];
    }

    if (self.myUISwitch2.on) {
        [copyOptions setValue:@"ON" forKey:@"myUISwitch2"];
    }
}

使用完整代码更新：

@property (nonatomic, retain) IBOutlet UISwitch *copy_hp_cchpi;
@property (nonatomic, retain) IBOutlet UISwitch *copy_hp_history;

- (IBAction)copyEntirePreviousNoteButtonClicked:(id)sender
{
    self.copy_hp_cchpi.on = YES;
    self.copy_hp_history.on = TRUE;
}

- (IBAction)updateButtonClicked:(id)sender
{
    NSMutableDictionary *copyOptions = [[[NSMutableDictionary alloc] init] autorelease];

    if (self.copy_hp_cchpi.on) {
        [copyOptions setValue:@"ON" forKey:@"copy_hp_cc_history_present_illness"];
    }

    if (self.copy_hp_history.on) {
        [copyOptions setValue:@"ON" forKey:@"copy_hp_med_fam_social_history"];
    }

    int rcode = [MyAPIDataSource copyPreviewAppointmentClinicalInfo:[MyAPIDataSource getCurrentAppointmentId] copyOptions:copyOptions];

    if (rcode) 
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to copy last appointment information.  Please try again." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];        
    } 
    else 
    {
        //Send Notifications to other screens that clinical info was copied from last appointment to current one.
        [[NSNotificationCenter defaultCenter] postNotificationName:@"LastAppointmentLoadedHandler" object:self];

        [self dismissModalViewControllerAnimated:YES];
    }
}

Answer 1

经过一番绞尽脑汁之后...

按照惯例，任何包含“copy”一词的 Objective C 方法都应该返回一个保留的对象。这同样适用于方法前缀“init”和“new”。

静态分析器知道此约定，并抱怨您的 copyEntirePreviousNoteButtonClicked 方法不返回保留的对象。

解决方案是不要在方法命名中包含“复制”一词，除非您确实这么想。坚持 Objective C 方法命名约定。更改方法的名称，问题就会消失。