iOS内存泄漏，因为应用程序文档中存储了更多图像 -（UIImage*）getImageFromURL:（NSString*）文件URL{ UIImage*结果； NSData*data=[NSData data WITHCONTENTSOFURL:[NSURL URLWithString:fileURL]]； 结果=[UIImage imageWithData:data]； 返回结果； } -（BOOL）saveImage:（UIImage*）带文件名的图像：（NSString*）图像名 { NSString*directoryPath=[NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，YES）对象索引：0]； NSString*扩展名=@“jpg”； if（[[extension lowercaseString]isEqualToString:@“png”]） { [UIImagePNGRPresentation（image）WriteFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@“%@.%@”，imageName，@“png”]]选项：NSAtomicWrite错误：nil]； } else if（[[extension lowercaseString]IsequalString:@“jpg”]| |[[extension lowercaseString]IsequalString:@“jpeg”]） { [UIImageJPEGresentation（image，1.0）writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@“%@.%@”，imageName，@“jpg”]]选项：NSAtomicWrite错误：nil]； } 其他的 { NSLog（@“图像保存失败\n无法识别张力：（@），使用（PNG/JPG）”，扩展名）； 返回FALSE； } 返回TRUE； } 对于（int i=0；i

减小图像的压缩大小以包含更多的图像。使用0.5作为压缩值，而不是1.0

  -(UIImage *) getImageFromURL:(NSString *)fileURL {

            UIImage * result;

            NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL]];
            result = [UIImage imageWithData:data];

            return result;
        }


    -(BOOL) saveImage:(UIImage *)image withFileName:(NSString *)imageName 
    {


        NSString * directoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

        NSString * extension = @"jpg";

        if ([[extension lowercaseString] isEqualToString:@"png"])
        {
            [UIImagePNGRepresentation(image) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"png"]] options:NSAtomicWrite error:nil];
        }

        else if ([[extension lowercaseString] isEqualToString:@"jpg"] || [[extension lowercaseString] isEqualToString:@"jpeg"])
        {
            [UIImageJPEGRepresentation(image, 1.0) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"jpg"]] options:NSAtomicWrite error:nil];
        }

        else
        {
            NSLog(@"Image Save Failed\nExtension: (%@) is not recognized, use (PNG/JPG)", extension);
            return FALSE;
        }

        return TRUE;
    }


for(int i =0; i<[imageNameArray count]; i++)
{
    UIImage *imageFromURL = [self getImageFromURL:imgURL];
    res = [self saveImage:imageFromURL withFileName:imgName];

}

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不要在主线程中循环，而是使用不同的线程或使用块来写入更多图像？UIImageJPEGresentation（图像，0.5）是否会降低图像质量？是的，但在iphone屏幕上不明显-@Prabhu

[UIImageJPEGRepresentation(image, 0.5) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"jpg"]] options:NSAtomicWrite error:nil];