说明
1. PlaceHolderImageView基于SDWebImage编写
2. 给定一个图片的urlString,以及一个placeholderImage就可以优雅的显示图片加载效果
效果
源码
PlaceholderImageView.h/.m
//// PlaceholderImageView.h// SDWebImageViewPlaceHorder//// Created by YouXianMing on 16/9/14.// Copyright ©
2016年 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年 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年 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年 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
以上所述是小编给大家介绍的ioS程序开发之使用PlaceholderImageView实现优雅的图片加载效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
