由于内存问题而终止的 iOS 应用程序

Posted 2023-03-05

【中文标题】由于内存问题而终止的 iOS 应用程序

【英文标题】：Terminated iOS app due to memory issue

【发布时间】：2017-11-08 05:46:10

【问题描述】：

在我的应用程序中，我收到错误消息（来自调试器的消息：由于内存问题而终止）并且应用程序崩溃。我通过 Xcode 仪器中的泄漏检查了我的应用程序，但没有发现问题。请帮助我找到解决方案，为什么会发生这种情况？

下面的代码显示内存警告..

代码 1

if (![[[pollOptionArray objectAtIndex:[indexPath row]]valueForKey:@"option_color"] isKindOfClass:[NSNull class]])

        NSArray* foo = [[[pollOptionArray objectAtIndex:[indexPath row]]valueForKey:@"option_color"] componentsSeparatedByString: @"#"];


        if([[foo objectAtIndex:1]isEqualToString:@"FFFFFF"]||[[foo objectAtIndex:1]isEqualToString:@"ffffff"])

            [titleLabel setBackgroundColor:[self colorWithHexString:@"000000"]];

        else

            [titleLabel setBackgroundColor:[self colorWithHexString:[foo objectAtIndex:1]]];

        


        if([[foo objectAtIndex:1]isEqualToString:@"FFFF00"]||[[foo objectAtIndex:1]isEqualToString:@"ffff00"])

            [titleLabel setTextColor:[self colorWithHexString:@"000000"]];

        

        //[titleLabel setBackgroundColor:[self colorWithHexString:[foo objectAtIndex:1]]];


        if(votedPoll && [votedPoll valueForKey:@"option_id"] && [[votedPoll valueForKey:@"option_id"] isEqualToString:[[pollOptionArray objectAtIndex:[indexPath row]]valueForKey:@"option_id"]])

            titleLabel.shadowColor = [UIColor blueColor];
            //titleLabel.layer.shadowColor = [[self colorWithHexString:[foo objectAtIndex:1]] CGColor];
            titleLabel.layer.shadowRadius = 3.0f;
            titleLabel.layer.shadowOpacity = 2;
            titleLabel.layer.shadowOffset = CGSizeZero;
            titleLabel.layer.masksToBounds = NO;

            //Blur the image
            UIGraphicsBeginImageContext(CGSizeMake(titleLabel.bounds.size.width, titleLabel.bounds.size.height));
            [titleLabel.layer renderInContext:UIGraphicsGetCurrentContext()];
            UIImage *viewImg = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            //Blur the image

            CIImage *blurImg = [CIImage imageWithCGImage:viewImg.CGImage];

            CGAffineTransform transform = CGAffineTransformIdentity;
            CIFilter *clampFilter = [CIFilter filterWithName:@"CIAffineClamp"];
            [clampFilter setValue:blurImg forKey:@"inputImage"];
            [clampFilter setValue:[NSValue valueWithBytes:&transform objCType:@encode(CGAffineTransform)] forKey:@"inputTransform"];

            CIFilter *gaussianBlurFilter = [CIFilter filterWithName: @"CIGaussianBlur"];
            [gaussianBlurFilter setValue:clampFilter.outputImage forKey: @"inputImage"];
            //[gaussianBlurFilter setValue:[NSNumber numberWithFloat:0.8f] forKey:@"inputRadius"];

            [gaussianBlurFilter setValue:[NSNumber numberWithFloat:2.0f] forKey:@"inputRadius"];


            CIImage *guesImg=gaussianBlurFilter.outputImage;
            CIContext *context = [CIContext contextWithOptions:nil];

            CGImageRef cgImg = [context createCGImage:guesImg fromRect:CGRectMake(0,0,70,40)];
            UIImage *outputImg = [UIImage imageWithCGImage:cgImg];

            //Add UIImageView to current view.

            UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(titleLabel.frame.origin.x-10, titleLabel.frame.origin.y,titleLabel.frame.size.width, titleLabel.frame.size.height)];


            //imgView.image = [UIImage imageNamed: @"arrow.png"];

            [imgView setTag:1109];

            imgView.image = outputImg;
            [imgView setTag:1108];

            gaussianBlurFilter = nil;
            outputImg = nil;
            blurImg = nil;

            viewImg = nil;
            [titleLabel addSubview:imgView];
            UIGraphicsEndImageContext();

            cell.userInteractionEnabled = NO;


        else

            blurImage.backgroundColor = [UIColor clearColor];
        
    

代码 2

if (![[NSString stringWithFormat:@"%@",theModal.noPercentage] isEqualToString:@""] ||[theModal.noPercentage isEqual: [NSNull null]]) self.lblNoPercentage.text = [NSString stringWithFormat:@"%@%@ %@",[NSString stringWithFormat:@"%@",theModal.noPercentage],@"%",[NSString stringWithFormat:@"%@", theModal.btn2Name] ];

    if([theModal.btn2Color isEqualToString:@"FFFFFF"]||[theModal.btn2Color isEqualToString:@"ffffff"])

        [self.lblNoPercentage setTextColor:[self colorWithHexString:@"000000"]];

    
    else

        [self.lblNoPercentage setTextColor:[self colorWithHexString:theModal.btn2Color]];

    


    //[self.lblNoPercentage setTextColor:[self colorWithHexString:theModal.btn2Color]];
    CGRect frame = self.btn4label.frame;
    frame.origin.x= 228;
    frame.origin.y= 74;
    frame.size.width= 100;

    [self.btn4label setFrame: frame];

代码 3

-(void)drawAnnotations

arrayIndex = 0;
NSArray *pointsArray = [self.mapVIEW overlays];
[self.mapVIEW removeOverlays:pointsArray];


for(int i = 0; i<pollListArr.count ; i++)


 MKPointAnnotation *annotation  = [[MKPointAnnotation alloc] init];
    PollListHomeModal *themodal = [pollListArr objectAtIndex:i ];
    annotation.coordinate = CLLocationCoordinate2DMake([themodal.poll_latitude doubleValue], [themodal.poll_longitude doubleValue]);
    [self.mapVIEW addAnnotation:annotation];
    annotation = nil;

【问题讨论】：

需要找出哪个代码产生了泄漏。您能否在您认为最可疑代码的地方分享您的代码。

您的应用程序可以分配比系统可以处理的更多的内存，而不会产生泄漏。您必须减少应用程序的内存使用量。

@HwanghoKim 用代码编辑了问题。

@Palle 请告诉我如何减少内存使用量。

【参考方案1】：

你需要为 CGImageRef 发布并且需要用@autoreleasepool 覆盖这个

我加了

@autoreleasepool

和

CGImageRelease(cgImg);
cgImg = nil;
guesImg = nil;

我解决了这个问题。请尝试并分享您的结果。

if(votedPoll && [votedPoll valueForKey:@"option_id"] && [[votedPoll valueForKey:@"option_id"] isEqualToString:[[pollOptionArray objectAtIndex:[indexPath row]]valueForKey:@"option_id"]])

    @autoreleasepool 
        titleLabel.shadowColor = [UIColor blueColor];
        //titleLabel.layer.shadowColor = [[self colorWithHexString:[foo objectAtIndex:1]] CGColor];
        titleLabel.layer.shadowRadius = 3.0f;
        titleLabel.layer.shadowOpacity = 2;
        titleLabel.layer.shadowOffset = CGSizeZero;
        titleLabel.layer.masksToBounds = NO;

        //Blur the image
        UIGraphicsBeginImageContext(CGSizeMake(titleLabel.bounds.size.width, titleLabel.bounds.size.height));
        [titleLabel.layer renderInContext:UIGraphicsGetCurrentContext()];
        UIImage *viewImg = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        //Blur the image

        CIImage *blurImg = [CIImage imageWithCGImage:viewImg.CGImage];

        CGAffineTransform transform = CGAffineTransformIdentity;
        CIFilter *clampFilter = [CIFilter filterWithName:@"CIAffineClamp"];
        [clampFilter setValue:blurImg forKey:@"inputImage"];
        [clampFilter setValue:[NSValue valueWithBytes:&transform objCType:@encode(CGAffineTransform)] forKey:@"inputTransform"];

        CIFilter *gaussianBlurFilter = [CIFilter filterWithName: @"CIGaussianBlur"];
        [gaussianBlurFilter setValue:clampFilter.outputImage forKey: @"inputImage"];
        //[gaussianBlurFilter setValue:[NSNumber numberWithFloat:0.8f] forKey:@"inputRadius"];

        [gaussianBlurFilter setValue:[NSNumber numberWithFloat:2.0f] forKey:@"inputRadius"];


        CIImage *guesImg=gaussianBlurFilter.outputImage;
        CIContext *context = [CIContext contextWithOptions:nil];

        CGImageRef cgImg = [context createCGImage:guesImg fromRect:CGRectMake(0,0,70,40)];
        UIImage *outputImg = [UIImage imageWithCGImage:cgImg];

        //Add UIImageView to current view.

        UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(titleLabel.frame.origin.x-10, titleLabel.frame.origin.y,titleLabel.frame.size.width, titleLabel.frame.size.height)];


        //imgView.image = [UIImage imageNamed: @"arrow.png"];

        [imgView setTag:1109];

        imgView.image = outputImg;
        [imgView setTag:1108];

        gaussianBlurFilter = nil;
        outputImg = nil;
        blurImg = nil;

        viewImg = nil;
        [titleLabel addSubview:imgView];
        UIGraphicsEndImageContext();

        cell.userInteractionEnabled = NO;

        CGImageRelease(cgImg);
        cgImg = nil;
        guesImg = nil;
    
else

    blurImage.backgroundColor = [UIColor clearColor];

和

arrayIndex = 0;
NSArray *pointsArray = [self.mapVIEW overlays];
[self.mapVIEW removeOverlays:pointsArray];

pointsArray = nil;

for(int i = 0; i<pollListArr.count ; i++)

    @autoreleasepool 
        MKPointAnnotation *annotation  = [[MKPointAnnotation alloc] init];
        PollListHomeModal *themodal = [pollListArr objectAtIndex:i ];
        annotation.coordinate = CLLocationCoordinate2DMake([themodal.poll_latitude doubleValue], [themodal.poll_longitude doubleValue]);
        [self.mapVIEW addAnnotation:annotation];
        annotation = nil;
        themodal = nil;
    

请测试一下。我找不到 2 的任何可疑代码

【讨论】：

感谢金黄浩。但是警告出现在另外 2 个代码中，请您查看一下。