企业网站设计的特点,网站建设要咨询哪些内容,哈尔滨网站制作多少钱,抖音分销系统开发iOS7以后发布了NSURLSession用来替换NSURLConnection#xff0c;NSURLSession使用方式有以下两种#xff1a; 1.block方式 #xff08;1#xff09;创建的步骤 获取单例会话对象 创建URL对象 隐含创建request 创建NSURLSessionDataTask // 1.获取会话对象
NSURLSess…iOS7以后发布了NSURLSession用来替换NSURLConnectionNSURLSession使用方式有以下两种 1.block方式 1创建的步骤 获取单例会话对象 创建URL对象 隐含创建request 创建NSURLSessionDataTask // 1.获取会话对象
NSURLSession *session [NSURLSession sharedSession];
//另外一种生成默认的GET请求的方法
NSURL *url [NSURL URLWithString:http://localhost:8080/MJServer/video];NSURLSessionDataTask *task [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {NSDictionary *dict [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];NSLog(%, dict);(2)使用NSURLSessionDataTask 创建session 创建URL 创建URLRequest 创建NSURLSessionDataTask
// 2.创建的一URL地址
NSURL *url [NSURL URLWithString:http://192.168.15.172:8080/MJServer/login];
// 3.创建一个请求对象
NSMutableURLRequest * request [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod POST;
request.HTTPBody [username123pwd123 dataUsingEncoding:NSUTF8StringEncoding];NSURLSessionDataTask *task [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {NSDictionary *dict [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];NSLog(%, dict);
}];[task resume];(3)使用NSURLSessionDownloadTask
// 1.得到session对象 NSURLSession *session [NSURLSession sharedSession]; // 2.创建URL对象
NSURL *url [NSURL URLWithString:http://localhost:8080/MJServer/resources/test.mp4];NSURLSessionDownloadTask *task [session downloadTaskWithURL:url completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {//NSString *caches [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];NSString *filePath [caches stringByAppendingPathComponent:response.suggestedFilename];NSFileManager *fileManager [NSFileManager defaultManager];[fileManager moveItemAtPath:location.path toPath:filePath error:nil];}];2.代理方式
(void)downLoadTask2 { NSURLSessionConfiguration *cfg [NSURLSessionConfiguration defaultSessionConfiguration]; // 使用配置对象获取会话对象 NSURLSession *session [NSURLSession sessionWithConfiguration:cfg delegate:self delegateQueue:[NSOperationQueue mainQueue]]; // 创建一个URL NSURL *url [NSURL URLWithString:”http://localhost:8080/MJServer/resources/test.mp4“]; NSURLSessionDownloadTask *task [session downloadTaskWithURL:url]; [task resume];
} - (void)URLSession:(NSURLSession )session downloadTask:(NSURLSessionDownloadTask )downloadTask didFinishDownloadingToURL:(NSURL *)location { NSString *caches [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]; NSString *filePath [caches stringByAppendingPathComponent:downloadTask.response.suggestedFilename]; NSFileManager *fileManager [NSFileManager defaultManager]; [fileManager moveItemAtPath:location.path toPath:filePath error:nil]; }
(void)URLSession:(NSURLSession )session downloadTask:(NSURLSessionDownloadTask )downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite { double progress (double)totalBytesWritten / totalBytesExpectedToWrite; NSLog(”已经下载了%f”, progress);
}
