の回避方法。

freetypeの最新バージョンをソースからインストールして、 .zshrcあたりに以下を設定

   1  export DYLD_LIBRARY_PATH=/usr/local/lib:$DYLD_LIBRARY_PATH

prefix=/usr/localを想定。

MacOSのバージョンアップが原因で発生するようになったらしい。

The main reason of which I was felt in love with Merb is it uses same context for controller and view. By sharing same context, view_helpers and instance variables become simple. You just use them in controller then you can use them in view by same manner. But as you know, Rails3 doesn't.

The reason Rails3 doesn't is probably for caching. If the view has many outer variables that affects its result, the cache key tends to be very complicated. In the manner of Rails3, we can use both action caching and partial caching easily. Because the all variables used in view are clear and small.

But in these days, I am doubting the use of those caching. Now we don't use browsers that has no capability of JavaScript. In addition, Google treats Ajax pages for indexing well. Haven't you ever seen the URI that has '#!'? That's for it. So now, the most of pages can be provided as static html with dynamic JSON. They are combined by JavaScript. There's few situations that the action caching and the partial caching go well.

In conclusion, I think the context should be shared between view and controller so that we can use view helpers simply.

長いジョブを実行中に UIActivityIndicatorView を表示したい場合。UIActivityIndicatorView は一旦 currentRunLoop に戻らないと表示されないので、以下のようにジョブをくくっても表示されない。

   1  	UIActivityIndicatorView* wAI = [ [ [ UIActivityIndicatorView alloc ] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge ] autorelease ];
   2  	[ [ UIApplication sharedApplication ].keyWindow addSubview:wAI ];
   3  	wAI.center = CGPointMake( 160, 240 );
   4  	[ wAI startAnimating ];
   5  	[ self 長いジョブ ];
   6  	[ wAI removeFromSuperview ];
   7  

表示させるための一つ目のアイディアは以下のように currentRunLoop を一瞬だけ動かす方法。

   1  	[ wAI startAnimating ];
   2  	[ NSRunLoop.currentRunLoop runUntilDate:[ NSDate dateWithTimeIntervalSinceNow:0.0 ] ];
   3  	[ self LongJob ];

２つ目のアイディアはジョブとインディケータを currentRunLoop に戻ったあと動くようにスケジュールすること。

   1  	wAI.startAnimating;
   2  	[ self performSelector:@selector(LongJob) withObject:nil afterDelay:0 ];
   3  	[ wAI performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0 ];
   4  

ネットで別スレッドでやってる例をよく見るが、その必要はない。 単に currentRunLoop が動けばいい。 別スレッドにするとしたら、長いジョブの方。