我正在尝试根据Vala documentation监视〜/ .local目录,我可以正确地监视主目录。但我无法监视〜/ .local。
public void initFileMonitor(){
try {
string homePath = Environment.get_home_dir();
string filePath = homePath + "/.local";
File file = File.new_for_path(filePath);
FileMonitor monitor = file.monitor_directory(FileMonitorFlags.NONE, null);
print ("\nMonitoring: %s\n", file.get_path ());
monitor.changed.connect ((src, dest, event) => {
if (dest != null) {
print ("%s: %s, %s\n", event.to_string (), src.get_path (), dest.get_path ());
} else {
print ("%s: %s\n", event.to_string (), src.get_path ());
}
});
} catch (Error err) {
print ("Error: %s\n", err.message);
}
}
Monitoring: /home/srdr/.local
答案 0 :(得分:2)
由于文件监视器存储在本地变量中,因此就像在函数调用结束时销毁其他变量(或用GObject术语确定/销毁)一样
为确保其寿命足够长,您应该将其设置为类的一个字段,然后FileMonitor实例由该类的实例“拥有”,而不是每次调用特定方法
可运行的演示(valac demo.vala --pkg gio-2.0
)
class FileMonitorDemo {
private FileMonitor monitor;
public void initFileMonitor() {
var path = Path.build_filename(Environment.get_home_dir(), ".local");
var file = File.new_for_path(path);
try {
monitor = file.monitor_directory(NONE);
message ("Monitoring: %s", file.get_path ());
monitor.changed.connect ((src, dest, event) => {
if (dest != null) {
print ("%s: %s, %s\n", event.to_string (), src.get_path (), dest.get_path ());
} else {
print ("%s: %s\n", event.to_string (), src.get_path ());
}
});
} catch (Error err) {
critical ("Error: %s\n", err.message);
}
}
}
void main () {
var filemon = new FileMonitorDemo();
filemon.initFileMonitor();
new MainLoop ().run ();
}
答案 1 :(得分:0)
您需要通过创建主循环并让其等待事件来实际运行监视器:
new MainLoop ().run ();