Get icon for another application in Objective-C

Question

How do I get the icon from another application using Objective-C?

I have tried this so far, however it just returns null:

NSURL *path = [NSURL URLWithString:@"/Applications/Calculator.app"];

NSLog(@"%@", path);

NSImage *image = (__bridge NSImage *)(QLThumbnailImageCreate(kCFAllocatorDefault, (__bridge CFURLRef)(path), CGSizeMake(100, 100), (__bridge CFDictionaryRef)(@{(NSString *)kQLThumbnailOptionIconModeKey: @NO})));

NSLog(@"%@", image);

Answer 1

You can use NSWorkspace, e.g.

NSImage *image = [[NSWorkspace sharedWorkspace] iconForFile:path];

If you want to use the app bundleId instead of knowing its path, you can do this first

path = [[NSWorkspace sharedWorkspace] absolutePathForAppBundleWithIdentifier:bundleIdentifier];

Answer 2

I think you're looking for [[NSWorkspace sharedWorkspace] iconForFile:pathToFile]

https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSWorkspace_Class/Reference/Reference.html#//apple_ref/doc/uid/20000391-iconForFile_