iOS網絡請求總結、GET、POST、同步、異步代碼塊、異步代理、第三方AFNetWorking2.0使用

首先需要明白，

GET跟POST 差別：

GET請求，将參數直接寫在通路路徑上。操作簡單，不過容易被外界看到，安全性不高，位址最多255位元組； POST請求，将參數放到body裡面。POST請求操作相對複雜，需要将參數和位址分開，不過安全性高，參數放在body裡面，不易被捕獲

同步跟異步差別：

同步請求可以從網際網路請求資料，一旦發送同步請求，程式将停止使用者互動，直至伺服器傳回資料完成，才可以進行下一步操作，

異步請求不會阻塞主線程，而會建立一個新的線程來操作，使用者發出異步請求後，依然可以對UI進行操作，程式可以繼續運作

以下分别介紹幾種方式的使用：

1.GET 同步請求

//建立請求路徑

NSString *strURL = [NSStringstringWithFormat:@"http://192.168.10.252/upload/mapi/index.php?act=register&r_type=1&email=%@&password=%@&user_name=%@",@"[email protected]",@"123456",@"zhangsan"];

//通過url建立網絡請求

NSURLRequest *request = [NSURLRequestrequestWithURL:[NSURLURLWithString:strURL]];

NSError *error =nil;

//同步方式連接配接伺服器

NSData *data = [NSURLConnectionsendSynchronousRequest:request returningResponse:nilerror:&error];

//json 解析傳回資料

NSDictionary *dic = [NSJSONSerializationJSONObjectWithData:data options:kNilOptionserror:nil];

NSLog(@"%@",[dicobjectForKey:@"info"]);

2.post 同步請求

//通過url建立網絡請求

NSString *strURL = [NSStringstringWithFormat:@"http://192.168.10.252/upload/mapi/index.php?"];

//通過url建立網絡請求

NSMutableURLRequest *request = [NSMutableURLRequestrequestWithURL:[NSURLURLWithString:strURL]];

//設定請求方式也POST（預設是GET）

[request setHTTPMethod:@"POST"];

//設定請求參數

NSString *body = [NSStringstringWithFormat:@"act=%@&r_type=%d&email=%@&password=%@&user_name=%@",@"register",1,@"[email protected]",@"123456",@"lisi"];

//需要NSUTF8StringEncoding轉碼

[request setHTTPBody:[bodydataUsingEncoding:NSUTF8StringEncoding]];

//同步方式連接配接伺服器

NSData *data = [NSURLConnectionsendSynchronousRequest:request returningResponse:nilerror:nil];

//json 解析傳回資料

NSDictionary *dic = [NSJSONSerializationJSONObjectWithData:data options:kNilOptionserror:nil];

NSLog(@"%@",[dicobjectForKey:@"info"]);

3.GET 異步代碼塊請求

NSString *strURL = [NSString stringWithFormat:@"http://192.168.10.252/upload/mapi/index.php?act=register&r_type=1&email=%@&password=%@&user_name=%@",@"[email protected]",@"123456",@"zhangsan"];

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:strURL]];

NSError *error = nil;

NSLog(@"111==%@",[NSThread currentThread]);

//建立異步代碼方式

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue new] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

NSLog(@"222==%@",[NSThread currentThread]);

//網絡請求結束

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];

NSLog(@"%@",[dic objectForKey:@"info"]);

//回到主線程，去重新整理界面

// self performSelectorOnMainThread:<#(SEL)#> withObject:<#(id)#> waitUntilDone:<#(BOOL)#>

dispatch_async(dispatch_get_main_queue(), ^{

//回主線程要做的事情

});

}];

4.POST 異步代碼塊請求

NSString *strURL = [NSStringstringWithFormat:@"http://192.168.10.252/upload/mapi/index.php?"];

NSMutableURLRequest *request = [NSMutableURLRequestrequestWithURL:[NSURLURLWithString:strURL]];

[request setHTTPMethod:@"POST"];

[request setTimeoutInterval:10];

NSString *body = [NSStringstringWithFormat:@"act=%@&r_type=%d&email=%@&password=%@&user_name=%@",@"register",1,@"[email protected]",@"123456",@"lisi"];

[request setHTTPBody:[bodydataUsingEncoding:NSUTF8StringEncoding]];

[NSURLConnectionsendAsynchronousRequest:request queue:[NSOperationQueuemainQueue] completionHandler:^(NSURLResponse *response,NSData *data, NSError *connectionError) {

NSDictionary *dic = [NSJSONSerializationJSONObjectWithData:data options:kNilOptionserror:nil];

NSLog(@"%@",[dicobjectForKey:@"info"]);

}];

5. 異步代理請求

用代理需要導入協定：NSURLConnectionDataDelegate

@interface ViewController ()<NSURLConnectionDataDelegate>

NSString *strURL = [NSString stringWithFormat:@"http://192.168.10.252/upload/mapi/index.php?"];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:strURL]];

[request setHTTPMethod:@"POST"];

NSString *body = [NSString stringWithFormat:@"act=%@&r_type=%d&email=%@&password=%@&user_name=%@",@"register",1,@"[email protected]",@"123456",@"lisi"];

[request setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];

//使用代理的方式做網絡請求

[NSURLConnection connectionWithRequest:request delegate:self];

#pragma mark -- 網絡請求代理方法實作

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;

{

NSLog(@"網絡請求總資料量,這個隻執行一次");

infoData = [[NSMutableData alloc]init];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

{

NSLog(@"這個方法會執行多次！");

[infoData appendData:data];

}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

{

NSLog(@"網絡請求結束！！！");

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:infoData options:kNilOptions error:nil];

NSLog(@"%@",dict);

NSLog(@"%@",dict[@"info"]);

}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

{

NSLog(@"網絡請求失敗。失敗原因%@",error);

}

5. 使用第三方做網絡請求，AFNetWorking2.0

頭檔案導入：

#import "AFNetworking.h"

AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc]init];

//設定請求逾時

manager.requestSerializer.timeoutInterval = 10;

//請求參數配置

NSDictionary *dict = @{@"act":@"register",@"r_type":@1,@"email":@"[email protected]",@"password":@"111111",@"user_name":@"wangwu1"};

// manager POST:nil parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

// //傳檔案的時候，會使用到這裡

// } success:^(AFHTTPRequestOperation *operation, id responseObject) {

// <#code#>

// } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

// <#code#>

// }

[manager POST:@"http://192.168.10.252/upload/mapi/index.php?" parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {

//網絡請求成功了

NSLog(@"11====%@",responseObject);

NSDictionary *dic = responseObject;

NSLog(@"%@",[dic objectForKey:@"info"]);

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

//網絡請求失敗了。

NSLog(@"error == %@",error);

}];

如有錯誤！歡迎指出。。謝謝！

每天進步一點點，做一個快樂的程式猿！！

iOS網絡請求總結、GET、POST、同步、異步代碼塊、異步代理、第三方AFNetWorking2.0使用