大约有 2,700 项符合查询结果（耗时：0.0214秒） [XML]
How to load images dynamically (or lazily) when users scrolls them into view
...visible viewport region ( upon view source, the page shows X number of <img> tags but they are not fetched from the server straight away ). What is this technique called, how does it work and in how many browsers does it work. And is there a jQuery plugin that can achieve this behavior with mi...
Android image caching
...on instance handled in ImagesCache class.
cache.initializeCache();
String img = "your_image_url_here";
Bitmap bm = cache.getImageFromWarehouse(img);
if(bm != null)
{
imv.setImageBitmap(bm);
}
else
{
imv.setImageBitmap(null);
DownloadImageTask imgTask = new DownloadImageTask(cache, imv, 300...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...们 发布日志 服务条款 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 ...
How to convert the background to transparent? [closed]
... OR enter URL of the file (below the image)
http://i.stack.imgur.com/2gQWg.png
Edit menu/Transparent (last one)
Click on the red area
Behold :) below is your image, it's just white triangle with transparency...
[dragging the image around in your browser for visibility,
the gray background and the bo...
Calling pylab.savefig without display in ipython
...d matplotlib.pylab in this regard. But, when I call pylab.savefig("test.png") the current figure get's displayed in addition to being saved in test.png . When automating the creation of a large set of plot files, this is often undesirable. Or in the situation that an intermediate file for exter...
How to capture UIView to UIImage without loss of quality on retina display
...[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
And in Swift 4:
func image(with view: UIView) -> UIImage? {
UIGraphicsBeginImageContextWithOptions(view.bounds....
How to find the array index with a value?
... {value: 400},
{value: 500}
];
var index = imageList.map(function (img) { return img.value; }).indexOf(200);
console.log(index);
In modern browsers you can use findIndex:
var imageList = [
{value: 100},
{value: 200},
{value: 300},
{value: 400},
{value: 50...
Is it possible to ping a server from Javascript?
...his.callback = callback
this.ip = ip;
var _that = this;
this.img = new Image();
this.img.onload = function() {_that.good();};
this.img.onerror = function() {_that.good();};
this.start = new Date().getTime();
this.img.src = "http://" + ip;
this.timer = setTimeout(f...
How to export plots from matplotlib with transparent background?
...function with the keyword argument transparent=True to save the image as a png file.
In [30]: x = np.linspace(0,6,31)
In [31]: y = np.exp(-0.5*x) * np.sin(x)
In [32]: plot(x, y, 'bo-')
Out[32]: [<matplotlib.lines.Line2D at 0x3f29750>]
In [33]: savefig('demo.png', transparent=Tr...
Example images for code and mark-up Q&As [closed]
...that defines the URLs and makes them easy to access.
Details: 32x32 pixel PNG (4 colors x 5 shapes) with partial transparency (along the edges).
Categories: png icons
Sprite Sheets
Chess Pieces as originally seen on this answ...