问题引出
最近公司做一个项目，为了安全要求所有的图片资源采用Ftp协议的方式访问。iOS项目图片缓存自然选择了SDWebImage， 可是它如何加载Ftp协议的图片呢？是不是一时间蒙住了？其实很简单。
解决办法
只需要将用户名与密码封装到图片url里即可。
NSString path = @"ftp://username:password@192.168.1.1/img/1.png";
[self.imgView sd_setImageWithURL:[NSURL URLWithString:path]];示例项目
开启mac下 ftp服务器
sudo -s launchctl load -w /System/Library/LaunchDaemons/ftp.plist sudo -s launchctl unload -w /System/Library/LaunchDaemons/ftp.plist 在用户路径下建立一个img文件夹 放了三张图片
建立一个示例iOS工程
cocopod 安装SDWebImage 当前最新版本是 3.8. 地址是 https://github.com/rs/SDWebImage
pod init 后 打开 podfile 添加一行
# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'target 'FtpImageDemo' do# Uncomment the next line if you're using Swift or would like to use dynamic frameworks# use_frameworks!# Pods for FtpImageDemopod 'SDWebImage', '~>3.8'target 'FtpImageDemoTests' doinherit! :search_paths# Pods for testingendtarget 'FtpImageDemoUITests' doinherit! :search_paths# Pods for testingendend
SDWebImge安装成功
storyboard的控制器中 放入三个ImageView 连好线，写如下代码
#import "ViewController.h"
#import <SDWebImage/UIImageView+WebCache.h>@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *imgView1;
@property (weak, nonatomic) IBOutlet UIImageView *imgView2;
@property (weak, nonatomic) IBOutlet UIImageView *imgView3;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];[self configViews];}- (void)configViews
{NSString *path1 = @"ftp://ruglcc:123456@192.168.1.100/img/1.jpg";NSString *path2 = @"ftp://ruglcc:123456@192.168.1.100/img/2.jpg";NSString *path3 = @"ftp://ruglcc:123456@192.168.1.100/img/3.jpg";[self.imgView1 sd_setImageWithURL:[NSURL URLWithString:path1]];[self.imgView2 sd_setImageWithURL:[NSURL URLWithString:path2]];[self.imgView3 sd_setImageWithURL:[NSURL URLWithString:path3]];
}
编译运行，有图有真相
