From 739e76308982eeb2d83c20f377e1723dff5b234a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jesu=CC=81s=20A=2E=20A=CC=81lvarez?= <zydeco@namedfork.net>
Date: Fri, 15 Jul 2016 21:00:51 +0200
Subject: [PATCH] don't use QOS_CLASS_* on iOS <8

---
 Mini vMac/UIImage+DiskImageIcon.m | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Mini vMac/UIImage+DiskImageIcon.m b/Mini vMac/UIImage+DiskImageIcon.m
index 8ab3eb3..bacea39 100644
--- a/Mini vMac/UIImage+DiskImageIcon.m	
+++ b/Mini vMac/UIImage+DiskImageIcon.m	
@@ -55,7 +55,8 @@ + (UIImage *)imageWithIconForDiskImage:(NSString *)path {
 
 + (void)loadIconForDiskImageAndNotify:(NSString *)path {
     if ([NSThread isMainThread]) {
-        dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), ^{
+        long queue = NSFoundationVersionNumber >= NSFoundationVersionNumber_iOS_8_0 ? QOS_CLASS_USER_INITIATED : DISPATCH_QUEUE_PRIORITY_LOW;
+        dispatch_async(dispatch_get_global_queue(queue, 0), ^{
             [self loadIconForDiskImageAndNotify:path];
         });
         return;