NSURLSession请求封装加HUD加载框-优快云博客

本文介绍了一种使用单例模式封装网络请求的方法，并通过Objective-C实现了一个具体的例子。该方法利用了NSURLSession进行网络请求，并结合SVProgressHUD显示加载进度。


在.h里面的方法 定义单例类

typedef void(^SuccessBlock) (id block);
typedef void(^FailureBlock) (id block);

@interface NetRequest : NSObject <NSURLSessionDelegate>

+ (instancetype)shareInstance;
- (void)requestWithURL:(NSString *)url params:(NSDictionary *)params successBlock:(SuccessBlock)success failure:(FailureBlock)failure;

#import <SVProgressHUD.h> // 第三方加载条控件

static NetRequest *reuqest;


@implementation NetRequest
{
    SuccessBlock sucblock;
    FailureBlock faiBlock;
    NSMutableData *_allData;
}
+ (instancetype)shareInstance
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        reuqest = [[NetRequest alloc] init];
    });
    return reuqest;
}

+ (instancetype)allocWithZone:(struct _NSZone *)zone
{
    if (!reuqest) {
        reuqest = [super allocWithZone:zone];
    }
    return reuqest;
}

- (id)copy
{
    return reuqest;
}

- (void)requestWithURL:(NSString *)url params:(NSDictionary *)params successBlock:(SuccessBlock)success failure:(FailureBlock)failure
{
    NSURLRequest *myRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:15];
    
    
    NSURLSessionDownloadTask *downLoad =[[NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]] downloadTaskWithRequest:myRequest];
    
    // 开始请求
    [SVProgressHUD  showWithStatus:@"正在加载..."]; //提示加载
    [downLoad resume];
    
    
    sucblock = success;
    faiBlock = failure;
    
}


// 请求完成
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask
didFinishDownloadingToURL:(NSURL *)location
{
    NSData *data = [NSData dataWithContentsOfURL:location];
    id reuslt = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    sucblock(reuslt);
    [SVProgressHUD dismiss];
}
// 网络请求进度
- (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 ( @" 下载进度 ---%f"
           , progress);
    [SVProgressHUD showProgress:progress];
    
}

然后再viewcontroller里面就可以写

// 请求
    NSString *string = [NSString stringWithFormat:@"http://……………………………………];
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:string]];
    
    // 配置
    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    
    // 任务
    NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
        NSLog(@"%@", result); }

一般我们都会封装一个AFN的网络请求可以满足我们基本上的任何需要但是偶尔我们也是要用一些

NSURLSession  如果特殊情况 封装好了以后可以拿过来用了

转载于:https://www.cnblogs.com/wangxiaoqi/p/6440398.html