ios - 如何在 block 中使用 NSTextView？

Question

我们知道Apple Transitioning to ARC Release Notes

Which classes don’t support weak references?

You cannot currently create weak references to instances of the following classes:

NSATSTypesetter, NSColorSpace, NSFont, NSMenuView, NSParagraphStyle, NSSimpleHorizontalTypesetter, and NSTextView.

Note: In addition, in OS X v10.7, you cannot create weak references to instances of NSFontManager, NSFontPanel, NSImage, NSTableCellView, NSViewController, NSWindow, and NSWindowController. In addition, in OS X v10.7 no classes in the AV Foundation framework support weak references.

所以问题是如何在 block 中使用 NSTextView？，如果不使用 weak， block 将持有 strong NSTextView 引用。

我担心应用无法释放 NSTextView。

我该怎么办？

Answer 1

试试下面:

NSTextView * __block textView = [[NSTextView alloc] init…];

为此添加 __block 以在 block 中解决问题，为了发布目的，您需要在完成 block 中或根据您的使用情况明确发布它。