xcode 使用 Objective C 将 POST 发送到 Web 服务器
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Sending POST to a web server using Objective C
提问by Ben T.
I have a pretty basic internal iOS app that I want to send a POST to a web-server. You basically have a bunch of buttons, and depending on what button you press, it sends a pre-defined "message" to the web-server.
我有一个非常基本的内部 iOS 应用程序，我想将 POST 发送到网络服务器。您基本上有一堆按钮，根据您按下的按钮，它会向网络服务器发送一条预定义的“消息”。
Once the buttons are pressed it takes them to another view and says Thanks for selecting the button that you pressed. I also want a pre-defined message to be sent to a web-server, formatted and then emailed to a static email address.
按下按钮后，它会将它们带到另一个视图并说感谢您选择您按下的按钮。我还希望将预定义的消息发送到网络服务器，进行格式化，然后通过电子邮件发送到静态电子邮件地址。
This is what I have so far.. I'm just trying to figure out the best way to send the POST. Is the way I have setup the best way to do it? Or is there smarter way to do this?
到目前为止，这就是我所拥有的。我只是想找出发送 POST 的最佳方式。我的设置方式是最好的方式吗？或者有更聪明的方法来做到这一点？
Sorry if it's messy and un-organized.. I'm very new to iOS development.
对不起，如果它是凌乱和无组织的。我对 iOS 开发很陌生。
@interface DrinkViewController () {
NSString *buttonlabel;
NSString *urlEncodeUsingEncoding;
}
@end
@implementation DrinkViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
-(IBAction)selectButton:(id)sender{
NSLog(@"Button Pressed:%d",((UIButton *)sender).tag);
NSString *dvalue;
switch (((UIButton *)sender).tag) {
case 1:
dvalue = @"Button 1";
break;
case 2:
dvalue = @"Button 2";
break;
case 3:
dvalue = @"Button 3";
break;
case 4:
dvalue = @"Button 4";
break;
case 5:
dvalue = @"Button 5";
break;
case 6:
dvalue = @"Button 6";
break;
case 7:
dvalue = @"Button 7";
break;
}
buttonlabel = dvalue;
[self performSegueWithIdentifier:@"selectionTransition" sender:sender];
NSData *postData = [buttonlabel dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSMutableURLRequest *request = [NSMutableURLRequest alloc];
[request setURL:[NSURL URLWithString:@"http://www.abc.com/form.php"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
NSLog(@"POST: %@ sent to %@", buttonlabel, request);
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"selectionTransition"]) {
NSLog(@"%@", buttonlabel);
// Get destination view
DetailViewController *vc = [segue destinationViewController];
// Pass the information to your destination view
[vc setLabelValue:buttonlabel];
}
}
@end
回答by J2theC
Here's what you need to use: NSURLRequest, NSURLConnection, NSURLResponse, NSURL. You might use another library, but i would recommend you to try to understand how these classes work (since you are new to this).
以下是您需要使用的：NSURLRequest、NSURLConnection、NSURLResponse、NSURL。您可能会使用另一个库，但我建议您尝试了解这些类的工作原理（因为您是新手）。
Here's how it works: You use the server url, create a NSURLRequest, assign the proper HTTP method(POST, GET, etc) and other necessary request headers, then you would call on NSURLConnection to get the response and the server data.
这是它的工作原理：您使用服务器 url，创建一个 NSURLRequest，分配正确的 HTTP 方法（POST、GET 等）和其他必要的请求标头，然后您将调用 NSURLConnection 以获取响应和服务器数据。
回答by Thawe
I am by far no expert, but I do make network calls in my code. I chose MKNetworkKitto replace my sorry network code.
我目前还不是专家，但我确实在我的代码中进行了网络调用。我选择了MKNetworkKit来替换我抱歉的网络代码。
Here is an example of how you may use it in your project:
以下是如何在项目中使用它的示例：
- (void)myFunctionToSendDataToTheServer
{
/*
* So here is a basic idea of how you could quickly use MKNetworkKit.
* the [op addData:postData forKey:@"postDataKey"]; call is where you're
* add that post data to the request body.
*/
NSString *someVariableYouWantPosted;
NSData *postData = [someVariableYouWantPosted dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"abc.com"];
MKNetworkOperation *op = [engine operationWithPath:@"/form.php"];
[op addData:postData forKey:@"postDataKey"];
/*
* If you're not familiar with blocks then this "onCompletion^" might look weird.
* Inside of the curly braces will get called when the request is done.
*/
[op onCompletion:^(MKNetworkOperation *completedOperation) {
NSLog(@"Successful response from server: %@", [completedOperation responseString]);
/*
* There are also some nice helper methods for extracting the response data in a different form
* [completedOperation responseJSON];
* [completedOperation responseImage];
* [completedOperation responseData];
*/
} onError:^(NSError *error) {
if ([error code] == kCFURLErrorNotConnectedToInternet) {
/*
* Maybe retry?
* This network kit also comes with a "freezable" property on the MKNetworkOperation.
* If you set that to YES then you don't need to worry about internet connectivity,
* the kit will try to send later when it reconnects.
*/
}
else {
/*
* You'll have your work cut out for you here. Sourcing the problem can be difficult.
* Simply an alert message or loggin the NSError to find out where you went wrong.
*/
}
}];
/*
* Don't forget to call "enqueueOperation:".
* This actually gets the request going and sends it off to the server.
*/
[engine enqueueOperation:op];
}
Let me know if you have any other questions regarding this topic or if I wasn't clear.
如果您对此主题有任何其他问题，或者我不清楚，请告诉我。
回答by ezekielDFM
My suggestion would be to use a 3rd party library. It will simplify the process for your considerably and save you a lot of time. I usually use the AFNetworking library.
我的建议是使用 3rd 方库。它将大大简化您的流程并为您节省大量时间。我通常使用 AFNetworking 库。
https://github.com/AFNetworking/AFNetworking
https://github.com/AFNetworking/AFNetworking
There is a POST example here:
这里有一个 POST 示例：
http://www.6foot3foot.com/developer-journal/afnetworking-php
http://www.6foot3foot.com/developer-journal/afnetworking-php
