Question

在macOS 10.13中运行我的macOS应用程序，我看到打印到控制台：

Scheduling the NSURLDownload loader is no longer supported.

这是什么意思？

Answer 1

Sparkle Updater似乎是我找到的实例中的罪魁祸首。我猜Sparkle开发团队将会参与其中，希望我们在Sparkle更新后不会再看到这条消息了。

Answer 2

它似乎意味着您刚刚创建了一个已弃用的类NSURLDownload的实例。

要显示此信息，请在Xcode中创建一个新的Cocoa命令行工具项目，并使用以下代码替换main.m中的代码：

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSURL* url = [[NSURL alloc] initWithString:@"https://example.com"];
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url                                                                        
                                                               cachePolicy:NSURLRequestReloadIgnoringCacheData
                                                           timeoutInterval:30.0];
        NSLog(@"Will print strange sentence to console") ;
        [[NSURLDownload alloc] initWithRequest:request
                                      delegate:nil];
        NSLog(@"Did print strange sentence to console") ;
    }
    return 0;
}

构建并运行。我在控制台中获得了以下结果（删除了时间戳）：

Will print strange sentence to console:
Scheduling the NSURLDownload loader is no longer supported.
Did print strange sentence to console

我会说＆＃34;修复＆＃34;是用NSURLSession替换已弃用的NSURLDownload。

Answer 3

您可以直接在Sparkle的源代码中更正它。通过使用以下内容替换NSURLDownload来更新第82行的SUAppcast.m文件：

NSURLSessionDownloadTask *downloadTask = [[NSURLSession sharedSession] downloadTaskWithRequest:request completionHandler:^(NSURL *location, __unused NSURLResponse *response, NSError *error) {

    if (location) {
        NSString *destinationFilename = NSTemporaryDirectory();
        if (destinationFilename) {
            // The file will not persist if not moved, Sparkle will remove it later. 
            destinationFilename = [destinationFilename stringByAppendingPathComponent:@"Appcast.xml"];

            NSFileManager *fileManager = [NSFileManager defaultManager];
            NSError *anError = nil;
            NSString *fromPath = [location path];
            if ([fileManager fileExistsAtPath:destinationFilename])
                [fileManager removeItemAtPath:destinationFilename error:&anError];
            BOOL fileCopied = [fileManager moveItemAtPath:fromPath toPath:destinationFilename error:&anError];
            if (fileCopied == NO) {
                [self reportError:anError];
            } else {
                self.downloadFilename = destinationFilename;

                dispatch_async(dispatch_get_main_queue(), ^{
                    [self downloadDidFinish:[[NSURLDownload alloc] init]];
                });
            }
        }
    } else {
            [self reportError:error];
    }
 }];

[downloadTask resume];

macOS 10.13：＆＃34;不再支持调度NSURLDownload加载程序。＆＃34;

3 个答案: