目标c - 内存使用量不断增加 - Iphone App

Question

我有一个使用NSTimer的递归循环，它每两秒运行一次并调用一个调用setupPhpCall函数的函数：

有3个NSTimers运行并始终点击setupPhpCall函数， 这可能是内存泄漏发生的地方吗？

-(NSString*)setupPhpCall:(NSString*)requestString :(NSString*)sciptPage{

NSData *myRequestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];

// Create your request string with parameter name as defined in PHP file
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: [NSString stringWithFormat: @"http://www.xxxx.co.uk/%@", sciptPage]]];
// set Request Type
[request setHTTPMethod: @"POST"];
// Set content-type
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
// Set Request Body
[request setHTTPBody: myRequestData];
// Now send a request and get Response

NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[NSError alloc] init];

NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse:&urlResponse error: &error];
// Log Response
NSString *response = [[NSString alloc] initWithBytes:[returnData bytes] length:[returnData length] encoding:NSUTF8StringEncoding];
NSLog(@"%@",response);

return response;

}

这是使用NSTimer调用的递归方法：

-(void)recurseForumActivity:(NSTimer *)timer{

    dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);

    dispatch_async(concurrentQueue, ^{


        NSString *myRequestString = [NSString stringWithFormat:@"lastDate=%@&threadTitle=%@&threadCountry=%@&threadCategory=%@&threadSubCategory=%@&getData=0",lastDateForumActivity,searchThreadTitle, searchThreadCountry, searchThreadCategory, searchThreadSubCategory];
        NSString *response = [self setupPhpCall:myRequestString :@"xxx.php"];

        dispatch_async(dispatch_get_main_queue(), ^{

            if(response.length > 0 && ![response isEqualToString:@"[]"]){

                labelNewForumThreads.text = [NSString stringWithFormat:@"%@ new threads...", response];







                if(imageviewForumAlert == NULL){
                    UIImage *image = [UIImage imageNamed:@"alert.png"];

                    imageviewForumAlert = [UIImageView new];
                    [viewNav1 addSubview:imageviewForumAlert];
                    imageviewForumAlert.translatesAutoresizingMaskIntoConstraints = NO;
                    imageviewForumAlert.image = image;

                    NSDictionary *viewsDictionary = @{@"imageviewForumAlert":imageviewForumAlert};
                    NSArray *constraint_H = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-19-[imageviewForumAlert(12)]-19-|"
                                                                                    options:0
                                                                                    metrics:nil
                                                                                      views:viewsDictionary];

                    NSArray *constraint_V = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-19-[imageviewForumAlert(12)]-19-|"
                                                                                    options:0
                                                                                    metrics:nil
                                                                                      views:viewsDictionary];



                    [self.view addConstraints:constraint_H];
                    [self.view addConstraints:constraint_V];



                }else{
                    imageviewForumAlert.hidden = NO;

                }
                /**NSDictionary *dic = [response JSONValue];
                if((NSNull*)dic != [NSNull null]){

                    labelNewForumThreads.text = [NSString stringWithFormat:@"%d new threads...", dic.count];

                }**/

            }else{

                imageviewForumAlert.hidden = YES;


                labelNewForumThreads.text = [NSString stringWithFormat:@"%d new threads...", 0];
            }
            /**else{
                labelNewForumThreads.text = [NSString stringWithFormat:@"%d new threads...", 0];
            }**/

        });

    });



}

修改

在我离开应用程序运行超过一小时后，在控制台中出现此错误：

Communications error: <OS_xpc_error: <error: 0x361c0614> { count = 1, contents =
"XPCErrorDescription" => <string: 0x361c086c> { length = 22, contents = "Connection interrupted" }
}>

我有运行aswel的分配工具

这是应用崩溃时分配工具的屏幕截图

修改

修改

我也注意到在启动乐器分配工具时我的内存使用率会快速上升，为什么会这样？