cocoa - NSWorkspace setIcon :forFile:options: crashes

Question

我有时会在 [NSWorkspace setIcon:forFile:options:] API 上遇到崩溃。

感谢任何帮助。这是崩溃堆栈，

0   libsystem_kernel.dylib          0x00007fff85bfbe56 __semwait_signal_nocancel + 10
1   libsystem_c.dylib               0x00007fff8c04818b nanosleep$NOCANCEL + 139
2   libsystem_c.dylib               0x00007fff8bfe7c78 usleep$NOCANCEL + 53
3   libsystem_c.dylib               0x00007fff8bfe7aa6 abort + 187
4   libsystem_c.dylib               0x00007fff8c04684c free + 389
5   com.apple.CoreServices.CarbonCore   0x00007fff8df7aaf7 CSMemDisposePtr + 23
6   com.apple.CoreServices.CarbonCore   0x00007fff8df7aaba CSMemDisposeHandle + 79
7   com.apple.CoreServices.CarbonCore   0x00007fff8df7c355 DisposeHandle + 9
8   com.apple.AppKit                0x00007fff90356598 -[NSWorkspace setIcon:forFile:options:] + 566

这是代码，

static NSImage  *FolderIcon = nil;

if(!FolderIcon) {
        FolderIcon = [[NSImage imageNamed:@"xxx.icns"] retain];
}

if(![[NSWorkspace sharedWorkspace] setIcon: FolderIcon
                                       forFile:Path
                                       options:0]) {
    NSLog(@"error");
}

我使用的是静态图标，所以我不认为悬空指针的可能性，我还检查了如果我们传递不存在的文件路径，那么它返回“NO”。但它并没有崩溃。

这很少能重现。一旦重现就会粘贴错误

Answer 1

您不应一次从多个线程调用 -setIcon:forFile:options:。

来自Documentation :

It is safe to call this method from any of your app’s threads, but you must call it from only one thread at a time.