TweetFollow Us on Twitter

Jul 99 Tips

Volume Number: 15 (1999)
Issue Number: 7
Column Tag: Tips & Tidbits

July 99 Tips

by Jeff Clites,

Invoking Services Reliably Under Mac OS X Server

Many apps have a need to open an URL in OmniWeb, or a compose window in MailViewer, and this is relatively easy since both applications offer a Service for this. However, in order to have this service reliably performed, it is best to delay the invocation until the next event loop. This can be done rather easily. When your app needs to open an URL (in this case a static one, but you could just as easily pass in a value), call [openUrl:self]. This will cause performOpenUrl: to be scheduled to run after a minimum delay of 0.0. In reality though, it will be executed the next time through the event loop.

When you are using a Macintosh but have to read a file created on a computer with an Intel processor, or when you have to write a file for later use on an Intel machine, this difference is something you have to worry about. You can use the following routines to convert shorts and longs back and forth between the two byte orders.

- openUrl:sender;
	NSString *urlString = "";
	[self performSelector: @selector(performOpenUrl:) 
			withObject: urlString afterDelay: 0.0];
	return self;

- performOpenUrl:(NSString *)urlName;
	NSPasteboard	*pboard;
	NSArray			*urlPboardTypes;
	NSString		*serviceName;

	pboard = [NSPasteboard 
	urlPboardTypes = [NSArray 
			arrayWithObjects:NSStringPboardType, nil];
	[pboard declareTypes:urlPboardTypes owner:nil];
	[pboard setString:urlName forType:NSStringPboardType];

	if((serviceName = [[NSUserDefaults standardUserDefaults] 
			stringForKey:@"URLService"]) == nil)
		serviceName = @"OmniWeb/Open URL";
	NSPerformService(serviceName, pboard);
	return self;

You'll notice above that we first attempt to read URLService from the defaults database; this would allow us to change the default browser in our preferences. You can cause MailViewer to open an empty compose window using a similar technique, substituting @selector(mailto:) for @selector(performOpenUrl:) in the above call to performSelector:withObject:afterDelay:

- mailto:sender;
	NSPasteboard	*pboard;
	NSArray		*urlPboardTypes;
	NSString	*serviceName = @"MailViewer/Mail To";

	pboard = [NSPasteboard 
	urlPboardTypes = [NSArray 
			arrayWithObjects:NSStringPboardType, nil];
	[pboard declareTypes:urlPboardTypes owner:nil];
	[pboard setString:[sender title] 
	NSPerformService(serviceName, pboard);
	return self;

Scott Anguish

Conversion from Intel Byte Order, Again

Last month we presented a pair of routines for converting integers between the two different byte orderings expected by Motorola and Intel processors. That code should work under any architecture, but if you are on a Mac there is a much more efficient way to implement this using the byte reversing instructions built into every PowerPC processor:

inline unsigned long IntelToMotorolaLong (unsigned long *original)
	return (__lwbrx(original, 0));

inline unsigned short IntelToMotorolaShort (unsigned short *original)
	return (__lhbrx(original, 0));

Eric Lengyel


Community Search:
MacTech Search:

Software Updates via MacUpdate

World of Tanks Generals guide - Tips and...
World of Tanks Generals is a brand new card game by the developer behind the World of Tanks shooter franchise. It plays like a cross between chess and your typical card game. You have to keep in consideration where you place your tanks on the board... | Read more »
TruckSimulation 16 guide: How to succeed...
Remember those strangely enjoyable truck missions in Grand Theft Auto V whereit was a disturbing amount of fun to deliver cargo? TruckSimulation 16 is reminiscent of that, and has you play the role of a truck driver who has to deliver various... | Read more »
The best GIF making apps
Animated GIFs have exploded in popularity recently which is likely thanks to a combination of Tumblr, our shorter attention spans, and the simple fact they’re a lot of fun. [Read more] | Read more »
The best remote desktop apps for iOS
We've been sifting through the App Store to find the best ways to do computer tasks on a tablet. That gave us a thought - what if we could just do computer tasks from our tablets? Here's a list of the best remote desktop apps to help you use your... | Read more »
Warhammer 40,000: Freeblade guide - How...
Warhammer 40,000: Freebladejust launched in the App Store and it lets you live your childhood dream of blowing up and slashing a bunch of enemies as a massive, hulking Space Marine. It's not easy being a Space Marine though - and particularly if... | Read more »
Gopogo guide - How to bounce like the be...
Nitrome just launched a new game and, as to be expected, it's a lot of addictive fun. It's called Gopogo, and it challenges you to hoparound a bunch of platforms, avoiding enemies and picking up shiny stuff. It's not easy though - just like the... | Read more »
Sago Mini Superhero (Education)
Sago Mini Superhero 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: KAPOW! Jack the rabbit bursts into the sky as the Sago Mini Superhero! Fly with Jack as he lifts impossible weights,... | Read more »
Star Wars: Galaxy of Heroes guide - How...
Star Wars: Galaxy of Heroes is all about collecting heroes, powering them up, and using them together to defeat your foes. It's pretty straightforward stuff for the most part, but increasing your characters' stats can be a bit confusing because it... | Read more »
The best cooking apps (just in time for...
It’s that time of year again, where you’ll be gathering around the dinner table with your family and a huge feast in front of you. [Read more] | Read more »
Square Rave guide - How to grab those te...
Square Rave is an awesome little music-oriented puzzle game that smacks of games like Lumines, but with its own unique sense of gameplay. To help wrap your head around the game, keep the following tips and tricks in mind. [Read more] | Read more »

Price Scanner via

Sunday roundup of Holiday weekend Mac sales:...
Take up to $500 off MSRP on the price of a new Mac at B&H Photo today as part of their Black Friday/Holiday weekend sale. Shipping is free, and B&H charges NY tax only. These prices are... Read more
Holiday weekend: Apple Watch on sale for $50-...
B&H Photo has the Apple Watch on sale today for $50-$100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - Apple Watch Sport: $50 off - Apple Watch: $50-$100 off Read more
Holiday weekend: iPad Air 2s on sale for up t...
B&H Photo has iPad Air 2s on sale for up to $80 off MSRP including free shipping plus NY sales tax only: - 16GB iPad Air 2 WiFi: $459 $40 off - 64GB iPad Air 2 WiFi: $569 $30 off - 128GB iPad Air... Read more
Holiday weekend Mac sales roundup: B&H Ph...
B&H Photo continues to have all new Macs on sale for up to $500 off MSRP as part of their Black Friday/Holiday weekend sale. Shipping is free, and B&H charges NY tax only: - 15″ 2.2GHz Retina... Read more
iMobie Releases its Ace iOS Cleaner PhoneClea...
iMobie Inc. has announced the new update of PhoneClean 4, its iOS cleaner designed to reclaim wasted space on iPhone/iPad for use and keep the device fast. Alongside, iMobie hosts a 3-day giveaway of... Read more
U.S. Cellular Offering iPad Pro
U.S. Cellular today announced that it is offering the new iPad Pro with Wi-Fi + Cellular, featuring a 12.9-inch Retina display with 5.6 million pixels — the most ever in an iOS device. U.S. Cellular... Read more
Newegg Canada Unveils Black Friday Deals for...
Newegg Canada is offering more than 1,000 deep discounts to Canadian customers this Black Friday, available now through Cyber Monday, with new deals posted throughout the week. “Black Friday is... Read more
Black Friday: Macs on sale for up to $500 off...
BLACK FRIDAY B&H Photo has all new Macs on sale for up to $500 off MSRP as part of their early Black Friday sale including free shipping plus NY sales tax only: - 15″ 2.2GHz Retina MacBook Pro: $... Read more
Black Friday: Up to $125 off iPad Air 2s at B...
BLACK FRIDAY Walmart has the 16GB iPad Air 2 WiFi on sale for $100 off MSRP on their online store. Choose free shipping or free local store pickup (if available): - 16GB iPad Air 2 WiFi: $399, save $... Read more
Black Friday: iPad mini 4s on sale for $100 o...
BLACK FRIDAY Best Buy has iPad mini 4s on sale for $100 off MSRP on their online store for Black Friday. Choose free shipping or free local store pickup (if available): - 16GB iPad mini 4 WiFi: $299.... Read more

Jobs Board

Specialist *Apple* /Mac Desktop - University...
…technical support, expertise and user training for a variety of Apple /Macintosh hardware, software and devices.Researches, analyzes and resolves complex Apple Read more
*Apple* Site Security Manager - Apple (Unite...
# Apple Site Security Manager Job Number: 42975010 Culver City, Califo ia, United States Posted: Oct. 2, 2015 Weekly Hours: 40.00 **Job Summary** The Apple Site Read more
WiSE *Apple* Pay Quality Engineer - Apple (...
# WiSE Apple Pay Quality Engineer Job Number: 44313381 Santa Clara Valley, Califo ia, United States Posted: Nov. 13, 2015 Weekly Hours: 40.00 **Job Summary** Join our Read more
Holiday Retail Associate with *Apple* Knowl...
…and assertive.Someone who can troubleshoot iOS devices (iPhone and iPad) and Apple Mail issues.Someone who can offer solutions.Someone who can work weekends.Someone with Read more
*Apple* Systems Engineer (Mclean, VA and NYC...
Summary:Assist in providing strategic direction and technical leadership within the Apple portfolio, including desktops, laptops, and printing environment. This person Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.