objective-c – 在10.6下使用Scripting Bridge调用Finder时返回值不正确(但是没有错误)

概述我一直在浏览StackOverflow和其他地方的大量与Scripting Bridge相关的线程,并且似乎无法弄清楚为什么一个 Cocoa代码块使得对Scripting Bridge调用Finder不再正常工作10.6以下. (类似版本的代码似乎在10.5下工作正常,我不知道导致行为改变的原因.) 基本上,我正在尝试访问Finder窗口的一些显示选项.我有以下代码块作为我的测试用例.我将它指向一 我一直在浏览StackOverflow和其他地方的大量与Scripting BrIDge相关的线程,并且似乎无法弄清楚为什么一个 Cocoa代码块使得对Scripting BrIDge调用Finder不再正常工作10.6以下. (类似版本的代码似乎在10.5下工作正常,我不知道导致行为改变的原因.)

基本上,我正在尝试访问Finder窗口的一些显示选项.我有以下代码块作为我的测试用例.我将它指向一个显示为图标的文件夹,当我运行代码时,没有任何错误块跳闸,但我总是在最后得到一个无意义的响应(iconSize = 0).

// Set up the Scripting BrIDge    FinderApplication *finder = [SBApplication applicationWithBundleIDentifIEr:@"com.apple.finder"];    // Get an HFS-style reference to a specifIEd folder    // (folderPath is an Nsstring * containing a POSIX-style path to a folder)    NSURL *folderURL = [NSURL fileURLWithPath:folderPath];    Nsstring *folderPathHFS = (Nsstring *)CFURLcopyfileSystemPath((CFURLRef)folderURL,kcfURLHFSPathStyle);    // Get the Finder-native folder reference    FinderFolder* folder = [[finder folders] objectAtLocation:folderPathHFS];    if (folder == nil) {        NSLog(@"folder error: %@",[[folder lastError] localizedDescription]);        return;    }    // Get the Finder-native container window associated with the folder    [folder openUsing:finder withPropertIEs:nil];    FinderFinderWindow *folderWindow = [[folder containerWindow] get];    if (folderWindow == nil) {        NSLog(@"folderWindow error: %@",[[folderWindow lastError] localizedDescription]);        return;    }    // RetrIEve the vIEw preferences for the folder    FinderIconVIEwOptions *ivo = [folderWindow iconVIEwOptions];    if (ivo == nil) {        NSLog(@"ivo error: %@",[[ivo lastError] localizedDescription]);    }    // Get the current icon size    int iconSize = (int)[ivo iconSize];    // display the icon size in our label    if (iconSize > 0) {        NSLog(@"successfully retrIEved icon size: %d",iconSize);    } else {        NSLog(@"Couldn't retrIEve icon size");    }

即使指向同一文件夹,此代码的纯AppleScript版本也可以正常工作：

tell application "Finder"        set aFolder to the folder "<HFS path to folder in question>"        set aFolderWindow to the container window of aFolder        set aIVO to the icon vIEw options of aFolderWindow        return the icon size of aIVOend tell

我的直觉是,当它通过脚本桥时,某些东西正在被投射或转换得很奇怪,但我完全没有关于要检查什么或在哪里看的想法.我一直尝试打印出类名,因为从Finder中检索对象并将[SBObject * get]调用标记到各种与SB相关的赋值语句的末尾,但无济于事.

有任何想法吗？

UPDATE

好的,所以我已经发现上面的代码中生成错误的位置,虽然我不觉得我更接近解决问题.事实证明,Scripting BrIDge的懒惰评估掩盖了这个问题.如果在检索对FinderWindow的引用后,您插入以下两行代码：

Nsstring * test = [folderWindow name];
NSLog(@“返回值==％@;错误消息==％@”,test,[[folderWindow lastError] localizedDescription]);

然后,Scripting BrIDge尝试实际执行名称检索,失败,并返回一个稍微更具建设性的错误消息：

返回值==(null);错误消息== *** 作无法完成. (Osstatus错误-1700.)

这很棒(进步？！),但仍然没有让我更接近解决问题.该错误消息似乎表明在某个地方存在AE强制问题,但我不确定如何继续解决它.生成的Finder.h文件(以及Finder的AppleScript字典)都非常清楚我应该返回对FinderWindow对象的引用这一事实,并且打开folderWindow对象似乎验证一切正常,直到名称呼叫.

解决方法 看起来 -objectAtLocation:期待NSURL而不是HFS风格的路径：

“discussion

This method is a
generalization of objectAtIndex: for
applications where the “index” is not
simply an integer. For example,Finder
can specify objects using a NSURL
object as a location. In OSA this is
kNown as “absolute position,” a
generalization of the notion of
“index” in Foundation—it Could be an
integer,but it doesn’t have to be. A
single object may even have a number
of different “absolute position”
values depending on the container.”

我只是尝试使用NSURL的代码,它运行正常.例如,以下代码

- (voID)applicationDIDFinishLaunching:(NSNotification *)aNotification {    MDFinderApplication *finder = [SBApplication             applicationWithBundleIDentifIEr:@"com.apple.finder"];    NSURL *URL = [NSURL fileURLWithPath:[@"~/Desktop" stringByStandardizingPath]];    if (URL) {         MDFinderFolder *folder = [[finder folders] objectAtLocation:URL];         NSLog(@"folder == %@",folder);    }}

产生了以下输出：

folder ==< FinderFolder @ 0x482b00：FinderFolder
应用程序“Finder”的“furl”(“file：// localhost / Users / mdouma46 / Desktop /”)(78829)>

(注意：我在创建Finder.h文件时使用了不同的参数(为了防止像FinderFinderWindow这样令人困惑的名字),所以我的类名略有不同).

因此,如果将代码更改为以下内容,则代码应该可以正常工作：

// Set up the Scripting BrIDgeFinderApplication *finder = [SBApplication       applicationWithBundleIDentifIEr:@"com.apple.finder"];// (folderPath is an Nsstring * containing a POSIX-style path to a folder)NSURL *folderURL = [NSURL fileURLWithPath:folderPath];// Get the Finder-native folder referenceFinderFolder* folder = [[finder folders] objectAtLocation:folderURL];if (folder == nil) {    NSLog(@"folder error: %@",[[folder lastError] localizedDescription]);    return;}// Get the Finder-native container window associated with the folder[folder reveal];FinderFinderWindow *folderWindow = [folder containerWindow];if (folderWindow == nil) {    NSLog(@"folderWindow error: %@",[[folderWindow lastError] localizedDescription]);    return;}// RetrIEve the vIEw preferences for the folder// UPDATED: THE FolLOWING WILL CAUSE AN "unrecognized selector":FinderIconVIEwOptions *ivo = [folderWindow iconVIEwOptions];if (ivo == nil) {    NSLog(@"ivo error: %@",[[ivo lastError] localizedDescription]);}// Get the current icon sizeint iconSize = (int)[ivo iconSize];// display the icon size in our labelif (iconSize > 0) {    NSLog(@"successfully retrIEved icon size: %d",iconSize);} else {    NSLog(@"Couldn't retrIEve icon size");}

更新：
您不应该添加-get调用; get就像普通的AppleScript一样暗示/可选/多余.

尝试获取[folderWindow iconVIEwOptions]时,我收到一条无法识别的选择器错误消息：

– [SBObject iconVIEwOptions]：无法识别的选择器发送到实例0x10018e270

您可以打印FinderWindow的特性：

NSLog(@"propertIEs == %@",[finderWindow propertIEs]);

产生类似的东西：

propertIEs == {bounds = "NSRect: {{173,289},{1241,663}}";closeable = 1;collapsed = 0;columnVIEwOptions = "<SBObject @0x1fc5d010: columnVIEwOptions of     FinderFinderWindow ID 5696 of application \"Finder\" (78829)>";currentVIEw = "<NSAppleEventDescriptor: 'clvw'>";floating = 0;iconVIEwOptions = "<SBObject @0x1fc5d550: iconVIEwOptions of    FinderFinderWindow ID 5696 of application \"Finder\" (78829)>";ID = 5696;index = 2;ListVIEwOptions = "<SBObject @0x1fc5cca0: ListVIEwOptions of     FinderFinderWindow ID 5696 of application \"Finder\" (78829)>";modal = 0;name = Applications;objectClass = "<NSAppleEventDescriptor: 'brow'>";position = "NSPoint: {173,289}";resizable = 1;sIDebarWIDth = 0;statusbarVisible = 1;target = "<FinderFolder @0x1fc5db10: FinderFolder \"Applications\"     of startupdisk of application \"Finder\" (78829)>";Titled = 1;toolbarVisible = 1;visible = 1;zoomable = 1;zoomed = 0;}

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