使用ARC在Lion 10.7上以编程方式创建和打开NSWindow [英] Programmatically create and open an NSWindow with ARC on Lion 10.7

问题描述

在google上搜索2小时后，我不知道如何分配和打开一个没有nib的新NSWindow。

After 2 hours of searching on google and so, i can't figure out how to allocate and open a new NSWindow without nib.

NSRect frame = NSMakeRect(100, 100, 200, 200);
NSUInteger styleMask =    NSBorderlessWindowMask;
NSRect rect = [NSWindow contentRectForFrameRect:frame styleMask:styleMask];
NSWindow * window =  [[NSWindow alloc] initWithContentRect:rect styleMask:styleMask backing: NSBackingStoreBuffered    defer:false];
[window setBackgroundColor:[NSColor blueColor]];
[window makeKeyAndOrderFront: window];

上面的代码来自此线程如何以编程方式创建Cocoa窗口？
我会疯了：（

The code above is taken from this thread How do I create a Cocoa window programmatically? I am going crazy :(

推荐答案

如果你使用ARC，除非你有一个强大的窗口引用，它将被引用它的最后一个语句后立即释放。

If you're using ARC, then unless you have a strong reference to the window, it will be released immediately after the last statement that references it.

ARC改变了你需要考虑对象的方式，从一个retain / release模型到一个所有权模型如果没有你的 code>变量，它会消失。

ARC changes the way you need to think about objects, from a retain/release model to an ownership model. If nothing owns your window variable, it will go away.

有几种方法来获取窗口的所有权。可以将窗口设置为实例变量或您的类中的属性使用 strong 关键字，或者您可以使用 __ strong

There are several ways to take ownership of the window. You can set the window as either an instance variable or as a property in your class using the strong keyword, or you can use the __strong qualifier when you declare the variable in your code.

有关ARC的更多信息，请参见 LLVM编译器网站。

There is a lot more information about ARC at the LLVM compiler site.

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