Rupert  Beatty

Rupert Beatty

1667310793

An Easy Way to Use Pull To Refresh and infinite Scrolling in Swift

ESPullToRefresh is an easy-to-use component that give pull-to-refresh and infinite-scrolling implemention for developers. By extension to UIScrollView, you can easily add pull-to-refresh and infinite-scrolling for any subclass of UIScrollView. If you want to customize its UI style, you just need conform the specified protocol.

中文介绍

Requirements

  • Xcode 8 or later
  • iOS 8.0 or later
  • ARC
  • Swift 5.0 or later

Features

  • Support UIScrollView and its subclasses UICollectionView UITableView UITextView
  • Pull-Down to refresh and Pull-Up to load more
  • Support customize your own style(s)

Demo

Download and run the ESPullToRefreshExample project in Xcode to see ESPullToRefresh in action.

Installation

CocoaPods

pod "ESPullToRefresh"

Carthage

github "eggswift/pull-to-refresh"

Manually

git clone https://github.com/eggswift/pull-to-refresh.git
open ESPullToRefresh

Usage

Default style:

example_default.gif

Add ESPullToRefresh to your project

import ESPullToRefresh

Add default pull-to-refresh

self.tableView.es.addPullToRefresh {
    [unowned self] in
    /// Do anything you want...
    /// ...
    /// Stop refresh when your job finished, it will reset refresh footer if completion is true
    self.tableView.es.stopPullToRefresh(completion: true)
    /// Set ignore footer or not
    self.tableView.es.stopPullToRefresh(completion: true, ignoreFooter: false)
}

Add default infinite-scrolling

self.tableView.es.addInfiniteScrolling {
    [unowned self] in
    /// Do anything you want...
    /// ...
    /// If common end
    self.tableView.es.stopLoadingMore()
    /// If no more data
    self.tableView.es.noticeNoMoreData()
}

Customize Style

As effect:

example_meituan.gif

PS: Load effect is from MeiTuan iOS app.

example_wechat.gif

Customize refresh need conform the ESRefreshProtocol and ESRefreshAnimatorProtocol protocol.

Add customize pull-to-refresh

func es.addPullToRefresh(animator animator: protocol<ESRefreshProtocol, ESRefreshAnimatorProtocol>, handler: ESRefreshHandler)

Add customize infinite-scrolling

func es.addInfiniteScrolling(animator animator: protocol<ESRefreshProtocol, ESRefreshAnimatorProtocol>, handler: ESRefreshHandler)

Espried and auto refresh

ESPullToRefresh support for the latest expiration time and the cache refresh time, You need set an refreshIdentifier to your UIScrollView.

scrollView.refreshIdentifier = "Your Identifier" // Set refresh identifier
scrollView.expriedTimeInterval = 20.0 // Set the expiration interval

You can use es.autoPullToRefresh() method, when the time over the last refresh interval expires automatically refreshed.

scrollView.es.autoPullToRefresh()

let expried = scrollView.espried // expired or not

Remove

func es.removeRefreshHeader()
func es.removeRefreshFooter()

Sponsor

You can support the project by checking out our sponsor page. It takes only one click:

git-adThis advert was placed by GitAds

Download Details:

Author: Eggswift
Source Code: https://github.com/eggswift/pull-to-refresh 
License: MIT license

#swift #webview #infinite #collectionview 

What is GEEK

Buddha Community

An Easy Way to Use Pull To Refresh and infinite Scrolling in Swift
Chloe  Butler

Chloe Butler

1667425440

Pdf2gerb: Perl Script Converts PDF Files to Gerber format

pdf2gerb

Perl script converts PDF files to Gerber format

Pdf2Gerb generates Gerber 274X photoplotting and Excellon drill files from PDFs of a PCB. Up to three PDFs are used: the top copper layer, the bottom copper layer (for 2-sided PCBs), and an optional silk screen layer. The PDFs can be created directly from any PDF drawing software, or a PDF print driver can be used to capture the Print output if the drawing software does not directly support output to PDF.

The general workflow is as follows:

  1. Design the PCB using your favorite CAD or drawing software.
  2. Print the top and bottom copper and top silk screen layers to a PDF file.
  3. Run Pdf2Gerb on the PDFs to create Gerber and Excellon files.
  4. Use a Gerber viewer to double-check the output against the original PCB design.
  5. Make adjustments as needed.
  6. Submit the files to a PCB manufacturer.

Please note that Pdf2Gerb does NOT perform DRC (Design Rule Checks), as these will vary according to individual PCB manufacturer conventions and capabilities. Also note that Pdf2Gerb is not perfect, so the output files must always be checked before submitting them. As of version 1.6, Pdf2Gerb supports most PCB elements, such as round and square pads, round holes, traces, SMD pads, ground planes, no-fill areas, and panelization. However, because it interprets the graphical output of a Print function, there are limitations in what it can recognize (or there may be bugs).

See docs/Pdf2Gerb.pdf for install/setup, config, usage, and other info.


pdf2gerb_cfg.pm

#Pdf2Gerb config settings:
#Put this file in same folder/directory as pdf2gerb.pl itself (global settings),
#or copy to another folder/directory with PDFs if you want PCB-specific settings.
#There is only one user of this file, so we don't need a custom package or namespace.
#NOTE: all constants defined in here will be added to main namespace.
#package pdf2gerb_cfg;

use strict; #trap undef vars (easier debug)
use warnings; #other useful info (easier debug)


##############################################################################################
#configurable settings:
#change values here instead of in main pfg2gerb.pl file

use constant WANT_COLORS => ($^O !~ m/Win/); #ANSI colors no worky on Windows? this must be set < first DebugPrint() call

#just a little warning; set realistic expectations:
#DebugPrint("${\(CYAN)}Pdf2Gerb.pl ${\(VERSION)}, $^O O/S\n${\(YELLOW)}${\(BOLD)}${\(ITALIC)}This is EXPERIMENTAL software.  \nGerber files MAY CONTAIN ERRORS.  Please CHECK them before fabrication!${\(RESET)}", 0); #if WANT_DEBUG

use constant METRIC => FALSE; #set to TRUE for metric units (only affect final numbers in output files, not internal arithmetic)
use constant APERTURE_LIMIT => 0; #34; #max #apertures to use; generate warnings if too many apertures are used (0 to not check)
use constant DRILL_FMT => '2.4'; #'2.3'; #'2.4' is the default for PCB fab; change to '2.3' for CNC

use constant WANT_DEBUG => 0; #10; #level of debug wanted; higher == more, lower == less, 0 == none
use constant GERBER_DEBUG => 0; #level of debug to include in Gerber file; DON'T USE FOR FABRICATION
use constant WANT_STREAMS => FALSE; #TRUE; #save decompressed streams to files (for debug)
use constant WANT_ALLINPUT => FALSE; #TRUE; #save entire input stream (for debug ONLY)

#DebugPrint(sprintf("${\(CYAN)}DEBUG: stdout %d, gerber %d, want streams? %d, all input? %d, O/S: $^O, Perl: $]${\(RESET)}\n", WANT_DEBUG, GERBER_DEBUG, WANT_STREAMS, WANT_ALLINPUT), 1);
#DebugPrint(sprintf("max int = %d, min int = %d\n", MAXINT, MININT), 1); 

#define standard trace and pad sizes to reduce scaling or PDF rendering errors:
#This avoids weird aperture settings and replaces them with more standardized values.
#(I'm not sure how photoplotters handle strange sizes).
#Fewer choices here gives more accurate mapping in the final Gerber files.
#units are in inches
use constant TOOL_SIZES => #add more as desired
(
#round or square pads (> 0) and drills (< 0):
    .010, -.001,  #tiny pads for SMD; dummy drill size (too small for practical use, but needed so StandardTool will use this entry)
    .031, -.014,  #used for vias
    .041, -.020,  #smallest non-filled plated hole
    .051, -.025,
    .056, -.029,  #useful for IC pins
    .070, -.033,
    .075, -.040,  #heavier leads
#    .090, -.043,  #NOTE: 600 dpi is not high enough resolution to reliably distinguish between .043" and .046", so choose 1 of the 2 here
    .100, -.046,
    .115, -.052,
    .130, -.061,
    .140, -.067,
    .150, -.079,
    .175, -.088,
    .190, -.093,
    .200, -.100,
    .220, -.110,
    .160, -.125,  #useful for mounting holes
#some additional pad sizes without holes (repeat a previous hole size if you just want the pad size):
    .090, -.040,  #want a .090 pad option, but use dummy hole size
    .065, -.040, #.065 x .065 rect pad
    .035, -.040, #.035 x .065 rect pad
#traces:
    .001,  #too thin for real traces; use only for board outlines
    .006,  #minimum real trace width; mainly used for text
    .008,  #mainly used for mid-sized text, not traces
    .010,  #minimum recommended trace width for low-current signals
    .012,
    .015,  #moderate low-voltage current
    .020,  #heavier trace for power, ground (even if a lighter one is adequate)
    .025,
    .030,  #heavy-current traces; be careful with these ones!
    .040,
    .050,
    .060,
    .080,
    .100,
    .120,
);
#Areas larger than the values below will be filled with parallel lines:
#This cuts down on the number of aperture sizes used.
#Set to 0 to always use an aperture or drill, regardless of size.
use constant { MAX_APERTURE => max((TOOL_SIZES)) + .004, MAX_DRILL => -min((TOOL_SIZES)) + .004 }; #max aperture and drill sizes (plus a little tolerance)
#DebugPrint(sprintf("using %d standard tool sizes: %s, max aper %.3f, max drill %.3f\n", scalar((TOOL_SIZES)), join(", ", (TOOL_SIZES)), MAX_APERTURE, MAX_DRILL), 1);

#NOTE: Compare the PDF to the original CAD file to check the accuracy of the PDF rendering and parsing!
#for example, the CAD software I used generated the following circles for holes:
#CAD hole size:   parsed PDF diameter:      error:
#  .014                .016                +.002
#  .020                .02267              +.00267
#  .025                .026                +.001
#  .029                .03167              +.00267
#  .033                .036                +.003
#  .040                .04267              +.00267
#This was usually ~ .002" - .003" too big compared to the hole as displayed in the CAD software.
#To compensate for PDF rendering errors (either during CAD Print function or PDF parsing logic), adjust the values below as needed.
#units are pixels; for example, a value of 2.4 at 600 dpi = .0004 inch, 2 at 600 dpi = .0033"
use constant
{
    HOLE_ADJUST => -0.004 * 600, #-2.6, #holes seemed to be slightly oversized (by .002" - .004"), so shrink them a little
    RNDPAD_ADJUST => -0.003 * 600, #-2, #-2.4, #round pads seemed to be slightly oversized, so shrink them a little
    SQRPAD_ADJUST => +0.001 * 600, #+.5, #square pads are sometimes too small by .00067, so bump them up a little
    RECTPAD_ADJUST => 0, #(pixels) rectangular pads seem to be okay? (not tested much)
    TRACE_ADJUST => 0, #(pixels) traces seemed to be okay?
    REDUCE_TOLERANCE => .001, #(inches) allow this much variation when reducing circles and rects
};

#Also, my CAD's Print function or the PDF print driver I used was a little off for circles, so define some additional adjustment values here:
#Values are added to X/Y coordinates; units are pixels; for example, a value of 1 at 600 dpi would be ~= .002 inch
use constant
{
    CIRCLE_ADJUST_MINX => 0,
    CIRCLE_ADJUST_MINY => -0.001 * 600, #-1, #circles were a little too high, so nudge them a little lower
    CIRCLE_ADJUST_MAXX => +0.001 * 600, #+1, #circles were a little too far to the left, so nudge them a little to the right
    CIRCLE_ADJUST_MAXY => 0,
    SUBST_CIRCLE_CLIPRECT => FALSE, #generate circle and substitute for clip rects (to compensate for the way some CAD software draws circles)
    WANT_CLIPRECT => TRUE, #FALSE, #AI doesn't need clip rect at all? should be on normally?
    RECT_COMPLETION => FALSE, #TRUE, #fill in 4th side of rect when 3 sides found
};

#allow .012 clearance around pads for solder mask:
#This value effectively adjusts pad sizes in the TOOL_SIZES list above (only for solder mask layers).
use constant SOLDER_MARGIN => +.012; #units are inches

#line join/cap styles:
use constant
{
    CAP_NONE => 0, #butt (none); line is exact length
    CAP_ROUND => 1, #round cap/join; line overhangs by a semi-circle at either end
    CAP_SQUARE => 2, #square cap/join; line overhangs by a half square on either end
    CAP_OVERRIDE => FALSE, #cap style overrides drawing logic
};
    
#number of elements in each shape type:
use constant
{
    RECT_SHAPELEN => 6, #x0, y0, x1, y1, count, "rect" (start, end corners)
    LINE_SHAPELEN => 6, #x0, y0, x1, y1, count, "line" (line seg)
    CURVE_SHAPELEN => 10, #xstart, ystart, x0, y0, x1, y1, xend, yend, count, "curve" (bezier 2 points)
    CIRCLE_SHAPELEN => 5, #x, y, 5, count, "circle" (center + radius)
};
#const my %SHAPELEN =
#Readonly my %SHAPELEN =>
our %SHAPELEN =
(
    rect => RECT_SHAPELEN,
    line => LINE_SHAPELEN,
    curve => CURVE_SHAPELEN,
    circle => CIRCLE_SHAPELEN,
);

#panelization:
#This will repeat the entire body the number of times indicated along the X or Y axes (files grow accordingly).
#Display elements that overhang PCB boundary can be squashed or left as-is (typically text or other silk screen markings).
#Set "overhangs" TRUE to allow overhangs, FALSE to truncate them.
#xpad and ypad allow margins to be added around outer edge of panelized PCB.
use constant PANELIZE => {'x' => 1, 'y' => 1, 'xpad' => 0, 'ypad' => 0, 'overhangs' => TRUE}; #number of times to repeat in X and Y directions

# Set this to 1 if you need TurboCAD support.
#$turboCAD = FALSE; #is this still needed as an option?

#CIRCAD pad generation uses an appropriate aperture, then moves it (stroke) "a little" - we use this to find pads and distinguish them from PCB holes. 
use constant PAD_STROKE => 0.3; #0.0005 * 600; #units are pixels
#convert very short traces to pads or holes:
use constant TRACE_MINLEN => .001; #units are inches
#use constant ALWAYS_XY => TRUE; #FALSE; #force XY even if X or Y doesn't change; NOTE: needs to be TRUE for all pads to show in FlatCAM and ViewPlot
use constant REMOVE_POLARITY => FALSE; #TRUE; #set to remove subtractive (negative) polarity; NOTE: must be FALSE for ground planes

#PDF uses "points", each point = 1/72 inch
#combined with a PDF scale factor of .12, this gives 600 dpi resolution (1/72 * .12 = 600 dpi)
use constant INCHES_PER_POINT => 1/72; #0.0138888889; #multiply point-size by this to get inches

# The precision used when computing a bezier curve. Higher numbers are more precise but slower (and generate larger files).
#$bezierPrecision = 100;
use constant BEZIER_PRECISION => 36; #100; #use const; reduced for faster rendering (mainly used for silk screen and thermal pads)

# Ground planes and silk screen or larger copper rectangles or circles are filled line-by-line using this resolution.
use constant FILL_WIDTH => .01; #fill at most 0.01 inch at a time

# The max number of characters to read into memory
use constant MAX_BYTES => 10 * M; #bumped up to 10 MB, use const

use constant DUP_DRILL1 => TRUE; #FALSE; #kludge: ViewPlot doesn't load drill files that are too small so duplicate first tool

my $runtime = time(); #Time::HiRes::gettimeofday(); #measure my execution time

print STDERR "Loaded config settings from '${\(__FILE__)}'.\n";
1; #last value must be truthful to indicate successful load


#############################################################################################
#junk/experiment:

#use Package::Constants;
#use Exporter qw(import); #https://perldoc.perl.org/Exporter.html

#my $caller = "pdf2gerb::";

#sub cfg
#{
#    my $proto = shift;
#    my $class = ref($proto) || $proto;
#    my $settings =
#    {
#        $WANT_DEBUG => 990, #10; #level of debug wanted; higher == more, lower == less, 0 == none
#    };
#    bless($settings, $class);
#    return $settings;
#}

#use constant HELLO => "hi there2"; #"main::HELLO" => "hi there";
#use constant GOODBYE => 14; #"main::GOODBYE" => 12;

#print STDERR "read cfg file\n";

#our @EXPORT_OK = Package::Constants->list(__PACKAGE__); #https://www.perlmonks.org/?node_id=1072691; NOTE: "_OK" skips short/common names

#print STDERR scalar(@EXPORT_OK) . " consts exported:\n";
#foreach(@EXPORT_OK) { print STDERR "$_\n"; }
#my $val = main::thing("xyz");
#print STDERR "caller gave me $val\n";
#foreach my $arg (@ARGV) { print STDERR "arg $arg\n"; }

Download Details:

Author: swannman
Source Code: https://github.com/swannman/pdf2gerb

License: GPL-3.0 license

#perl 

Rupert  Beatty

Rupert Beatty

1667310793

An Easy Way to Use Pull To Refresh and infinite Scrolling in Swift

ESPullToRefresh is an easy-to-use component that give pull-to-refresh and infinite-scrolling implemention for developers. By extension to UIScrollView, you can easily add pull-to-refresh and infinite-scrolling for any subclass of UIScrollView. If you want to customize its UI style, you just need conform the specified protocol.

中文介绍

Requirements

  • Xcode 8 or later
  • iOS 8.0 or later
  • ARC
  • Swift 5.0 or later

Features

  • Support UIScrollView and its subclasses UICollectionView UITableView UITextView
  • Pull-Down to refresh and Pull-Up to load more
  • Support customize your own style(s)

Demo

Download and run the ESPullToRefreshExample project in Xcode to see ESPullToRefresh in action.

Installation

CocoaPods

pod "ESPullToRefresh"

Carthage

github "eggswift/pull-to-refresh"

Manually

git clone https://github.com/eggswift/pull-to-refresh.git
open ESPullToRefresh

Usage

Default style:

example_default.gif

Add ESPullToRefresh to your project

import ESPullToRefresh

Add default pull-to-refresh

self.tableView.es.addPullToRefresh {
    [unowned self] in
    /// Do anything you want...
    /// ...
    /// Stop refresh when your job finished, it will reset refresh footer if completion is true
    self.tableView.es.stopPullToRefresh(completion: true)
    /// Set ignore footer or not
    self.tableView.es.stopPullToRefresh(completion: true, ignoreFooter: false)
}

Add default infinite-scrolling

self.tableView.es.addInfiniteScrolling {
    [unowned self] in
    /// Do anything you want...
    /// ...
    /// If common end
    self.tableView.es.stopLoadingMore()
    /// If no more data
    self.tableView.es.noticeNoMoreData()
}

Customize Style

As effect:

example_meituan.gif

PS: Load effect is from MeiTuan iOS app.

example_wechat.gif

Customize refresh need conform the ESRefreshProtocol and ESRefreshAnimatorProtocol protocol.

Add customize pull-to-refresh

func es.addPullToRefresh(animator animator: protocol<ESRefreshProtocol, ESRefreshAnimatorProtocol>, handler: ESRefreshHandler)

Add customize infinite-scrolling

func es.addInfiniteScrolling(animator animator: protocol<ESRefreshProtocol, ESRefreshAnimatorProtocol>, handler: ESRefreshHandler)

Espried and auto refresh

ESPullToRefresh support for the latest expiration time and the cache refresh time, You need set an refreshIdentifier to your UIScrollView.

scrollView.refreshIdentifier = "Your Identifier" // Set refresh identifier
scrollView.expriedTimeInterval = 20.0 // Set the expiration interval

You can use es.autoPullToRefresh() method, when the time over the last refresh interval expires automatically refreshed.

scrollView.es.autoPullToRefresh()

let expried = scrollView.espried // expired or not

Remove

func es.removeRefreshHeader()
func es.removeRefreshFooter()

Sponsor

You can support the project by checking out our sponsor page. It takes only one click:

git-adThis advert was placed by GitAds

Download Details:

Author: Eggswift
Source Code: https://github.com/eggswift/pull-to-refresh 
License: MIT license

#swift #webview #infinite #collectionview 

Houston  Sipes

Houston Sipes

1600430400

10 Free Online Resources To Learn Swift Language

Swift is a fast and efficient general-purpose programming language that provides real-time feedback and can be seamlessly incorporated into existing Objective-C code. This is why developers are able to write safer, more reliable code while saving time. It aims to be the best language that can be used for various purposes ranging from systems programming to mobile as well as desktop apps and scaling up to cloud services.

Below here, we list down the 10 best online resources to learn Swift language.

(The list is in no particular order)

#developers corner #free online resources to learn swift language #learn swift #learn swift free #learn swift online free #resources to learn swift #swift language #swift programming

Top Swift Development Companies | Top Swift Developers - TopDevelopers.co

A thoroughly researched list of top Swift developers with ratings & reviews to help find the best Swift development companies around the world.

#swift development service providers #best swift development companies #top swift development companies #swift development solutions #top swift developers #swift

Hire Dedicated Swift Developers

Want to create a native iOS application for your Startup?

Hire Dedicated Swift Developers for end-to-end services like development, migration, upgrade, testing, and support & maintenance. Trust HourlyDeveloper.io our Swift development team for iOS device apps that are high on performance and security.

Consult with experts:- https://bit.ly/2C5M6cz

#hire dedicated swift developers #swift developers #swift development company #swift development services #swift development #swift