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分析器时我为每条线路收到内存泄漏警告。

- (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"];
    }
}

使用完整代码进行更新：

@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

经过大量的搔痒......

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'。

静态分析器知道这个约定并抱怨你的copyEntirePreviousNoteButtonClicked方法没有返回一个保留的对象。

解决方案不是为包含“copy”一词的方法命名，除非你真的是这个意思。坚持Objective C方法命名约定。更改方法的名称，问题就会消失。

UISwitch的静态分析仪内存泄漏警告

1 个答案: