本文用來(lái)對(duì) iOS 網(wǎng)絡(luò)中 HTTP 請(qǐng)求相關(guān)內(nèi)容進(jìn)行總結(jié)涯塔。
一 茅信、HTTP 請(qǐng)求
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1 NSURLConnectiong
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(1)同步GET請(qǐng)求
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// 1.創(chuàng)建請(qǐng)求路徑(url)
NSURL *url = [NSURL URLWithString:@""];
// 2.通過(guò)請(qǐng)求路徑(url)創(chuàng)建請(qǐng)求對(duì)象(request)
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 3.向服務(wù)器發(fā)送同步請(qǐng)求(data)
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
// sendSynchronousRequest阻塞式的方法翎蹈，等待服務(wù)器返回?cái)?shù)據(jù)
// 4.解析服務(wù)器返回的數(shù)據(jù)(解析成字符串)
NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
* ###(2)異步GET請(qǐng)求
// 1.創(chuàng)建請(qǐng)求路徑(url)
NSURL *url = [NSURL URLWithString:@""];
// 2.通過(guò)請(qǐng)求路徑(url)創(chuàng)建請(qǐng)求對(duì)象(request)
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 3.向服務(wù)器發(fā)送異步請(qǐng)求
[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
// 請(qǐng)求完畢會(huì)來(lái)到這個(gè)block
// 4.解析服務(wù)器返回的數(shù)據(jù)（解析成字符串）
NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"%@", string);
}];
* ### (3)通過(guò)代理發(fā)送異步請(qǐng)求
// 1.創(chuàng)建請(qǐng)求路徑(url)
NSURL *url = [NSURL URLWithString:@""];
// 2.通過(guò)請(qǐng)求路徑(url)創(chuàng)建請(qǐng)求對(duì)象(request)
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 3.通過(guò)代理創(chuàng)建連接對(duì)象
[NSURLConnection connectionWithRequest:request delegate:self];
// [[NSURLConnection alloc] initWithRequest:request delegate:self];
// NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO];
// startImmediately:是否立即發(fā)送請(qǐng)求
// 開(kāi)始發(fā)送請(qǐng)求
// [conn start];
// 取消發(fā)送請(qǐng)求
// [conn cancel];
代理需要實(shí)現(xiàn)的方法：
#pragma mark - <NSURLConnectionDataDelegate>
// 接收到服務(wù)器的響應(yīng)
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
// 接收到服務(wù)器的數(shù)據(jù)（如果數(shù)據(jù)量比較大透且，這個(gè)方法會(huì)被調(diào)用多次）
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data; // 不斷拼接服務(wù)器返回的數(shù)據(jù)
// 服務(wù)器的數(shù)據(jù)成功接收完畢
-(void)connectionDidFinishLoading:(NSURLConnection *)connection;
// 請(qǐng)求失敗（比如請(qǐng)求超時(shí)）
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error;
* ### (4)同步POST請(qǐng)求
// 1.創(chuàng)建請(qǐng)求路徑(url)
NSURL *url = [NSURL URLWithString:@""];
// 2.通過(guò)請(qǐng)求路徑(url)創(chuàng)建請(qǐng)求對(duì)象(request)
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
// 更改請(qǐng)求方法
request.HTTPMethod = @"POST";
// 設(shè)置請(qǐng)求體
request.HTTPBody = [@"" dataUsingEncoding:NSUTF8StringEncoding];
// 設(shè)置超時(shí)(5秒后超時(shí))
request.timeoutInterval = 5;
// 設(shè)置請(qǐng)求頭(非必要羽氮，看情況)
// [request setValue:@"iOS 9.0" forHTTPHeaderField:@"User-Agent"];
// 3.向服務(wù)器發(fā)送同步請(qǐng)求
[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
* ### (5)異步POST請(qǐng)求
NSURL *url = [NSURL URLWithString:@""];
// 2.通過(guò)請(qǐng)求路徑(url)創(chuàng)建請(qǐng)求對(duì)象(request)
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
// 更改請(qǐng)求方法
request.HTTPMethod = @"POST";
// 設(shè)置請(qǐng)求體
request.HTTPBody = [@"" dataUsingEncoding:NSUTF8StringEncoding];
// 設(shè)置超時(shí)(5秒后超時(shí))
request.timeoutInterval = 5;
// 設(shè)置請(qǐng)求頭
// [request setValue:@"iOS 9.0" forHTTPHeaderField:@"User-Agent"];
// 3.向服務(wù)器發(fā)送異步請(qǐng)求
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (connectionError) { // 比如請(qǐng)求超時(shí)
NSLog(@"----請(qǐng)求失敗");
} else {
NSLog(@"------%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
}
}];
* ###(6)NSURLConnection 中文URL處理
NSString *urlStr = @"";
// 將中文URL進(jìn)行轉(zhuǎn)碼
urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:urlStr];
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二、 NSURLSession
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GET請(qǐng)求
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// 第一種GET請(qǐng)求
// 獲得NSURLSession對(duì)象
NSURLSession *session = [NSURLSession sharedSession];
// 創(chuàng)建任務(wù)
NSURLSessionDataTask *task = [session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@""]] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
}];
// 啟動(dòng)任務(wù)
[task resume];
// 第二種GET請(qǐng)求
// 獲得NSURLSession對(duì)象
NSURLSession *session = [NSURLSession sharedSession];
// 創(chuàng)建任務(wù)
NSURLSessionDataTask *task = [session dataTaskWithURL:[NSURL URLWithString:@""] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
}];
// 啟動(dòng)任務(wù)
[task resume];
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POST請(qǐng)求
// 獲得NSURLSession對(duì)象
NSURLSession *session = [NSURLSession sharedSession];
// 創(chuàng)建請(qǐng)求
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@""]];
request.HTTPMethod = @"POST"; // 請(qǐng)求方法
request.HTTPBody = [@"" dataUsingEncoding:NSUTF8StringEncoding]; // 請(qǐng)求體
// 創(chuàng)建任務(wù)
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
}];
// 啟動(dòng)任務(wù)
[task resume];
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通過(guò)代理發(fā)送請(qǐng)求
// 獲得NSURLSession對(duì)象
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc] init]];
// 創(chuàng)建任務(wù)
NSURLSessionDataTask *task = [session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@""]]];
// 啟動(dòng)任務(wù)
[task resume];
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代理需要實(shí)現(xiàn)的方法：
#pragma mark - <NSURLSessionDataDelegate>
// 1.接收到服務(wù)器的響應(yīng)
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
// 允許處理服務(wù)器的響應(yīng)惫恼，才會(huì)繼續(xù)接收服務(wù)器返回的數(shù)據(jù)
completionHandler(NSURLSessionResponseAllow);
// void (^)(NSURLSessionResponseDisposition)
}
// 2.接收到服務(wù)器的數(shù)據(jù)（可能會(huì)被調(diào)用多次）
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
NSLog(@"%s", __func__);
}
// 3.請(qǐng)求成功或者失數笛骸（如果失敗祈纯，error有值）
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"%s", __func__);
}
-
AFNetworking
- GET請(qǐng)求
// 第一種GET請(qǐng)求
AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
NSDictionary *params = @{
@"" : @"",
@"" : @""
};
[mgr GET:@"" parameters:params
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"請(qǐng)求成功---%@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"請(qǐng)求失敗---%@", error);
}];
// 第二種GET請(qǐng)求
// AFHTTPSessionManager內(nèi)部包裝了NSURLSession
AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
NSDictionary *params = @{
@"" : @"",
@"" : @""
};
[mgr GET:@"" parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(@"請(qǐng)求成功---%@", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(@"請(qǐng)求失敗---%@", error);
}];
- POST請(qǐng)求
// AFHTTPRequestOperationManager內(nèi)部包裝了NSURLConnection
AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
NSDictionary *params = @{
@"" : @"",
@"" : @""
};
[mgr POST:@"" parameters:params
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"請(qǐng)求成功---%@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"請(qǐng)求失敗---%@", error);
}];
