邓映山 YingshanDeng

YingshanDeng / font-metrics.js

Created February 2, 2018 03:04

字体测量

	function fontMetrics (family, size) {
	this._family = family \|\| (family = "Monaco, 'Courier New', Courier, monospace")
	this._size = parseInt(size, 10) \|\| (size = 12)

	// Preparing container
	var line = document.createElement('div')
	var body = document.body
	line.style.position = 'absolute'
	line.style.whiteSpace = 'nowrap'
	line.style.font = size + 'px ' + family

YingshanDeng / hdpi-canvas-polyfill.js

Created February 2, 2018 02:32

hidp-canvas-polyfill

	function hdpiCanvasPolyfill (canvas) {
	var dpr = Math.max(1, window.devicePixelRatio \|\| 1)
	var logicalWidth = canvas.width
	var logicalHeight = canvas.height

	canvas.width = dpr * logicalWidth
	canvas.height = dpr * logicalHeight
	canvas.style.width = `${logicalWidth}px`
	canvas.style.height = `${logicalHeight}px`

YingshanDeng / simple-promise.js

Last active September 6, 2017 13:08

Implement Promise without The Promise Resolution Procedure

	'use strict'

	// The Promise States constants
	const PENDING = 0
	const FULFILLED = 1
	const REJECTED = 2

	export default class Promise {
	// The constructor function
	constructor (executor) {

YingshanDeng / CSS3 Media Queries Template

Created March 21, 2017 01:47

CSS3 Media Queries template

	/*
	* Author: http://stuffandnonsense.co.uk/blog/about/hardboiled_css3_media_queries/
	*/

	/* Smartphones (portrait and landscape) ----------- */
	@media only screen
	and (min-device-width : 320px)
	and (max-device-width : 480px) {
	/* Styles */
	}

YingshanDeng / object-observe.html

Last active March 3, 2017 13:34

YingshanDeng / iOS-UIImage-FixOrientation

Created May 22, 2015 11:38

调整图片方向

	-(UIImage )fixOrientation:(UIImage )aImage
	{
	if (aImage == nil)
	{
	return nil;
	}
	CGImageRef imgRef = aImage.CGImage;
	CGFloat width = CGImageGetWidth(imgRef);
	CGFloat height = CGImageGetHeight(imgRef);
	CGAffineTransform transform = CGAffineTransformIdentity;

YingshanDeng / iOS-CPU

Created May 22, 2015 11:35

获取 CPU 使用率

	#import <mach/mach.h>
	// 获取 CPU 使用率
	float cpu_usage()
	{
	kern_return_t kr;
	task_info_data_t tinfo;
	mach_msg_type_number_t task_info_count;

	task_info_count = TASK_INFO_MAX;
	kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)tinfo, &task_info_count);

YingshanDeng / iOS-FindTopVC

Last active August 29, 2015 14:21

Find the current top view controller for your iOS application

	- (UIViewController *)topViewController{
	return [self topViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
	}

	- (UIViewController )topViewController:(UIViewController )rootViewController
	{
	if (rootViewController.presentedViewController == nil) {
	return rootViewController;
	}