How to relaunch finder application

Question

I am using following applescript to relaunch finder application.

osascript -e \"tell application \\\"Finder\\\"\" -e \"delay 1\" -e \"try\" -e         


        

Answer 1

This is the wrong way to go about things if you are using Cocoa. You should always use native APIs where possible, whereas you are attempting to call a shell script that itself builds and runs an AppleScript. Your AppleScript waits for one second before attempting a relaunch, which is an arbitrary value. You should actually be waiting for Finder to quit.

Instead, you should use the NSRunningApplication class to manage this, by using Key-Value Observing to monitor the instance's terminated property, so that you can relaunch the app when it terminates:

//assume "finder" is an ivar of type NSRunningApplication
//it has to be a strong reference or it will be released before the observation method
//is called

- (void)relaunchFinder
{
    NSArray* apps = [NSRunningApplication runningApplicationsWithBundleIdentifier:@"com.apple.finder"];
    if([apps count])
    {
        finder = [apps objectAtIndex:0];
        [finder addObserver:self forKeyPath:@"isTerminated" options:0 context:@"QuitFinder"];
        [finder terminate];
    }

}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if (context == @"QuitFinder")
    {
        if([keyPath isEqualToString:@"isTerminated"])
        {
            [[NSWorkspace sharedWorkspace] launchAppWithBundleIdentifier:@"com.apple.finder" options:NSWorkspaceLaunchDefault additionalEventParamDescriptor:NULL launchIdentifier:NULL];
            [object removeObserver:self forKeyPath:@"isTerminated"];
        }
    } else {
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}