IOS program Development using Placeholderimageview to achieve elegant picture loading effect _ios

Description

1. Placeholderimageview based on Sdwebimage

2. Given a picture of the urlstring, and a placeholderimage can be elegant display picture loading effect

Effect

Source

Placeholderimageview.h/.m

//PlaceholderImageView.h
//Sdwebimageviewplacehorder////
Created by
youxianming on 16/9/14.
COPYRIGHT©2016 year youxianming. All rights reserved.
#import <UIKit/UIKit.h>
@interface placeholderimageview:uiview
/**
* picture ' s URL string .
* *
@property (nonatomic, strong) NSString *urlstring;
/**
* The placeholder ' s image.
* *
@property (nonatomic, strong) UIImage *placeholderimage;
/**
* Default is Uiviewcontentmodescaleaspectfill.
* *
@property (nonatomic) Uiviewcontentmode Placeholderimagecontentmode;
/**
* Default is Uiviewcontentmodescaleaspectfill.
* *
@property (nonatomic) Uiviewcontentmode Contentimagecontentmode;
@end

Imagecell.h/.m

//ImageCell.h
//Sdwebimageviewplacehorder////
Created by
youxianming on 16/9/14.
COPYRIGHT©2016 year youxianming. All rights reserved.
#import <UIKit/UIKit.h>
#import "PlaceholderImageView.h"
@interface Imagecell: UITableViewCell
@property (nonatomic, strong) Placeholderimageview *placeholderimageview;
@end////
imagecell.m
//Sdwebimageviewplacehorder////
Created by youxianming on
16/9/14.
//copyright©2016 year youxianming. All rights reserved.
//

#import "ImageCell.h"

@implementation Imagecell
-(Instancetype) Initwithstyle: (Uitableviewcellstyle) style Reuseidentifier: (nsstring *) Reuseidentifier {
if (self = [super Initwithstyle:style Reuseidentifier:reuseidentifier]) {
Self.selectionstyle = Uitableviewcellselectionstylenone;
Self.placeholderimageview = [[Placeholderimageview alloc] Initwithframe:cgrectmake (0, 0, 150.F, 150.F)];
Self.placeholderImageView.placeholderImage = [UIImage imagenamed:@ "1"];
[Self AddSubview:self.placeholderImageView];
}
return self;
}
@end

Viewcontroller.m

VIEWCONTROLLER.M//Sdwebimageviewplacehorder////Created by youxianming on 16/9/14. COPYRIGHT©2016 year youxianming.
All rights reserved. #import "ViewController.h" #import "uiimageview+webcache.h" #import "PlaceholderImageView.h" #import "ImageCell.h" @ Interface Viewcontroller () <uitableviewdelegate, uitableviewdatasource> @property (nonatomic, Strong)
UITableView *tableview;
@property (nonatomic, strong) Nsarray *pictures; @end @implementation Viewcontroller-(void) viewdidload {[Super viewdidload]; self.pictures = @[@ "https:// Pic.cnblogs.com/avatar/607542/20151017230728.png ", @" Https://pic.cnblogs.com/face/607741/20140226202001.png ", @" Https://pic.cnblogs.com/face/815231/20150923160245.png ", @" https://pic.cnblogs.com/face/993558/20160729092113. PNG ", @" Https://pic.cnblogs.com/face/894202/20160217151952.png ", @" https://pic.cnblogs.com/face/968459/ 20160709111712.png ", @" Https://pic.cnblogs.com/face/145865/20160210174306.png ", @" https://pic.cnblogs.com/face/ 796658/20151026090914.png ", @" Https://pic.cnblogs.com/face/933887/20160629214007.png ", @" https://pic.cnblogs.com/face/ 125303/20130313094252.png ", @" Https://pic.cnblogs.com/face/976232/20160730173456.png ", @" https://pic.cnblogs.com /face/969708/20160602120239.png ", @" Https://pic.cnblogs.com/face/954541/20160705113740.png ", @" https://
Pic.cnblogs.com/face/799942/20150818204115.png "];
Placeholderimageview *pimageview = [[Placeholderimageview alloc] Initwithframe:cgrectmake (0, 0, 150.F, 150.F)];
[Self.view Addsubview:pimageview];
pimageview.urlstring = @ "Https://pic.cnblogs.com/avatar/607542/20151017230728.png";
Self.tableview = [[UITableView alloc] initWithFrame:self.view.bounds];
Self.tableView.delegate = self;
Self.tableView.dataSource = self;
Self.tableView.rowHeight = 150.F;
[Self.view AddSubview:self.tableView];
[Self.tableview Registerclass:[imagecell class] forcellreuseidentifier:@ "Imagecell"]; }-(Nsinteger) TableView: (UITableView *) TableView numberofrowsinsection: (nsinteger) Section {RetuRN _pictures.count; }-(UITableViewCell *) TableView: (UITableView *) TableView Cellforrowatindexpath: (Nsindexpath *) IndexPath {ImageCell *
cell = [TableView dequeuereusablecellwithidentifier:@ "Imagecell"];
cell.placeholderImageView.urlString = _pictures[indexpath.row];
return cell;  } @end

The above is a small series to introduce the development of iOS program using Placeholderimageview to achieve elegant picture loading effect, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!