大约有 26,000 项符合查询结果（耗时：0.0350秒） [XML]
Convert between UIImage and Base64 string
...
Swift 5
Encoding
func convertImageToBase64String (img: UIImage) -> String {
return img.jpegData(compressionQuality: 1)?.base64EncodedString() ?? ""
}
Decoding
func convertBase64StringToImage (imageBase64String:String) -> UIImage {
let imageData = Data.init(bas...
CSS :after not adding content to certain elements
...
img and input are both replaced elements.
A replaced element is any element whose appearance and dimensions are
defined by an external resource. Examples include images (<img> tags),
plugins (<object> tags...
How to develop or migrate apps for iPhone 5 screen resolution?
...
It's worth noting that [UIImage imageNamed:@"background.png"] will still only load either "background.png" or "background@2x.png", it will not load "background-568h@2x.png" if it exists.
– tvon
Sep 13 '12 at 20:34
...
How do I save a UIImage to a file?
...ents folder of your app. You use NSFileManager to do that.
You use UIImagePNGRepresentation to convert your image to NSData and save that to disk.
// Create path.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAt...
Fast way to get image dimensions (not filesize)
...the height and width of an image in pixels. It should handle at least JPG, PNG and TIFF, but the more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obviously reads the images as a whole f...
Setting an image for a UIButton in code
...
Objective-C
UIImage *btnImage = [UIImage imageNamed:@"image.png"];
[btnTwo setImage:btnImage forState:UIControlStateNormal];
Swift 5.1
let btnImage = UIImage(named: "image")
btnTwo.setImage(btnImage , for: .normal)
...
What does the 'standalone' directive mean in XML?
...ereafter used for validation only.
As an example, consider the humble <img> tag. If you look at the XHTML 1.0 DTD, you see a markup declaration telling the parser that <img> tags must be EMPTY and possess src and alt attributes. When a browser is going through an XHTML 1.0 document and ...
What are the best practices for JavaScript error handling?
...in which he proposed something like this:
function log(sev,msg) {
var img = new Image();
img.src = "log.php?sev=" +
encodeURIComponent(sev) +
"&msg=" + encodeURIComponent(msg);
}
// usage
log(1, "Something bad happened.")
// Auto-log uncaught JS errors
window.onerror =...
How can I create a “Please Wait, Loading…” animation using jQuery?
...background: rgba( 255, 255, 255, .8 )
url('http://i.stack.imgur.com/FhHRx.gif')
50% 50%
no-repeat;
}
/* When the body has the loading class, we turn
the scrollbar off with overflow:hidden */
body.loading .modal {
overflow: hidden;
}
/* A...
string sanitizer for filename
...name:
' onerror= 'alert(document.cookie).jpg
becomes an XSS hole:
<img src='<? echo $image ?>' />
// output:
<img src=' ' onerror= 'alert(document.cookie)' />
Because of that, the popular CMS software Wordpress removes them, but they covered all relevant chars only after som...