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 aIVO
end 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==操作无法完成. (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
-objectAtLocation:期待NSURL而不是HFS风格的路径：
“Discussion
This method is a
generalization ofobjectAtIndex:for
applications where the “index” is not
simply an integer. For example,Finder
can specify objects using aNSURL
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.”
- (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).
// Set up the Scripting Bridge
FinderApplication *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 reference
FinderFolder* 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 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");
}
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;
}