ios 中 sdwebimage 怎么显示 重定向 url图片?
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悬赏园豆：5
[待解决问题]
ios 中 sdwebimage 怎么显示 重定向 url,这个url是淘宝的头像,浏览器输入后,url会变,得到头像,在ios中怎么使用??
url: http://wwc.taobaocdn.com/avatar/getAvatar.do?userNick=\\U56de\\U8f66\\U95f4&width=80&height=80&type=sns
重定向后 url: http://gw.alicdn.com/tps/i3/TB1yeWeIFXXXXX5XFXXuAZJYXXX-210-210.png_80x80.jpg
应该怎么处理?
所有回答(1)
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这个问题有两个解决办法我先说简单的
由于APP图片重定向的图片或许很多可以封装一个请求体
请看代码
.h和.m文件如下
1 #import <UIKit/UIKit.h> 2 3 typedef void(^ChongDingXiangBlock)(NSURL *url, NSError *error); 4 typedef void(^ErrorBlock)(NSError *error); 5 @interface ChongDingXiangViewController : UIViewController 6 7 + (void)initWithPath:(NSString *)urlStr completion:(ChongDingXiangBlock)completion error:(ErrorBlock)errorBlock; 8 @end
#import "ChongDingXiangViewController.h" @interface ChongDingXiangViewController () @end @implementation ChongDingXiangViewController + (void)initWithPath:(NSString *)urlStr completion:(ChongDingXiangBlock)completion error:(ErrorBlock)errorBlock{ NSString* urlString = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]]; NSURL *url = [NSURL URLWithString:urlString]; NSMutableURLRequest *quest = [NSMutableURLRequest requestWithURL:url]; quest.HTTPMethod = @"GET";//设置get请求 NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration]; sessionConfig.requestCachePolicy = NSURLRequestReloadIgnoringLocalCacheData; // NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig delegate:self delegateQueue:[NSOperationQueue currentQueue]]; NSURLSession *session = [NSURLSession sharedSession]; NSURLSessionDataTask *task = [session dataTaskWithRequest:quest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) { NSHTTPURLResponse *res = (NSHTTPURLResponse *)response; NSLog(@"location2 code: %ld",res.statusCode); NSLog(@"location2重定向之后的地址是: %@",res.URL); if (!data) { errorBlock(error); }else{ completion(res.URL,error); } }]; [task resume]; } @end
接着在要显示的图片的控制器中引用头文件并调用即可.
// 设置默认头像 [ChongDingXiangViewController initWithPath:@"http://wwc.taobaocdn.com/avatar/getAvatar.do?userNick=\\U56de\\U8f66\\U95f4&width=80&height=80&type=sns" completion:^(NSURL *url, NSError *error) { dispatch_async(dispatch_get_main_queue(), ^{ [_userImage sd_setImageWithURL:url]; }); } error:^(NSError *error) { }];
第二种方法是使用NSURLSession代理方法. 个人觉得第一种方便些!
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig delegate:self delegateQueue:[NSOperationQueue currentQueue]];
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task willPerformHTTPRedirection:(NSHTTPURLResponse *)response newRequest:(NSURLRequest *)request completionHandler:(void (^)(NSURLRequest * __nullable))completionHandler{ NSDictionary *dic = response.allHeaderFields; NSLog(@"location code: %ld",response.statusCode); NSLog(@"location: %@",response.allHeaderFields); NSLog(@"重定向之后的地址是-%@",dic[@"Location"]); dispatch_async(dispatch_get_main_queue(), ^{ [_userImage sd_setImageWithURL:dic[@"Location"]]; }); completionHandler(request); // completionHandler(nil); //这个如果为nil则表示拦截跳转。 }