小编Cyb*_*oai的帖子

Tapping the cursor in a UITextView brings up a UIMenuController. Tapping Select causes the relevant text to be selected and another UIMenuController with new options to be displayed. Tapping anywhere else in the text view causes the "second" UIMenuController to hide.

I have a custom UIMenuItem that, when tapped, selects the current line of text in a UITextView and then displays the UIMenuController again for subsequent actions, however the "second" UIMenuController does not hide when tapping anywhere else in the …

在OS X 10.9.1上的Xcode 5.0.2中:

uint64_t data = 0x6ffa9e58938d7f5d;
NSData *nsdataObj = [NSData dataWithBytes:&data length:8];
NSLog(@"%@", nsdataObj);

输出:

<5d7f8d93 589efa6f>

数据如何/为何会被逆转？