大约有 45,000 项符合查询结果（耗时：0.0596秒） [XML]
DateTime.Now vs. DateTime.UtcNow
...ndering what exactly are the principles of how the two properties work. I know the second one is universal and basically doesn't deal with time zones, but can someone explain in detail how they work and which one should be used in what scenario?
...
How to draw a custom UIView that is just a circle - iPhone app
...easiest way of making a circle, but is not necessarily the most efficient. If performance is vital, drawRect will probably yield better results.
– Benjamin Mayo
Jul 5 '11 at 22:28
...
string.Join on a List or other type
...does what you want:
String.Join<T>(String, IEnumerable<T>)
If you can't upgrade, you can achieve the same effect using Select and ToArray.
return string.Join(",", a.Select(x => x.ToString()).ToArray());
...
How can I create a UILabel with strikethrough text?
...
SWIFT 4 UPDATE CODE
let attributeString: NSMutableAttributedString = NSMutableAttributedString(string: "Your Text")
attributeString.addAttribute(NSAttributedString.Key.strikethroughStyle, value: 2, range: NSMakeRange(0, a...
How can I convert my device token (NSData) into an NSString?
I am implementing push notifications. I'd like to save my APNS Token as a String.
29 Answers
...
Disabling user selection in UIWebView
...nu:
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if (action == @selector(copy:) ||
action == @selector(paste:)||
action == @selector(cut:))
{
return _copyCutAndPasteEnabled;
}
return [super canPerformAction:action withSender:sender];
}
...
What's the difference between array_merge and array + array?
A fairly simple question. What's the difference between:
9 Answers
9
...
How can I determine if a variable is 'undefined' or 'null'?
How do I determine if variable is undefined or null ?
30 Answers
30
...
Which letter of the English alphabet takes up most pixels?
... @MestreLion: Which font are you using? Face, size, and any modifiers, such as boldness or italics.
– Earl Jenkins
Sep 4 '13 at 18:15
2
...
Loaded nib but the 'view' outlet was not set
...e's owner icon on the left bar (top one, looks like a yellow outlined box)
If you don't see the right-hand sidebar, click on the third icon above "view" in your toolbar. This will show the right-hand sidebar
In the right-hand sidebar, click on the third tab--the one that looks a bit like a newspaper...