PlaceholderImageView, placeholderimage

PlaceholderImageView, placeholderimage

PlaceholderImageView

 

Description

1. PlaceHolderImageView Based on SDWebImage

2. Given the urlString of an image and a placeholderImage, the image loading effect can be elegantly displayed.

 

Effect

 

Source code

PlaceholderImageView.h/.m

//// PlaceholderImageView. h // SDWebImageViewPlaceHorder /// Created by YouXianMing on 16/9/14. // Copyright©2016 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 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 YouXianMing. all rights reserved. // # import "ImageCell. h "@ implementation ImageCell-(instancetype) identifier :( optional) 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 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 progress: @ "ImageCell"]; cell. placeholderImageView. urlString = _ pictures [indexPath. row]; return cell;} @ end