我正在尝试做一个使用数据库的应用程序(实际上是在我的本地主机中),我尝试了ASIHTTPRequest,但在iOS 5上遇到了很多问题(我在那里学会了如何使用ASIHTTPRequest表单:http://www.raywenderlich.com/2965/how-to-write-an-ios-app-that-uses-a-web-service
现在我正在尝试使用苹果提供的应用程序接口: NSURLRequest / NSURLConnection等...
我阅读了Apple在线指南,并编写了以下第一个代码:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL
URLWithString:@"http://localhost:8888/testNSURL/index.php"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setValue:@"Hello world !" forKey:@"myVariable"];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if (theConnection) {
receiveData = [NSMutableData data];
}
}我添加了API所需的委托
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
- (void)connection:(NSURLConnection *)connection
- (void)connectionDidFinishLoading:(NSURLConnection *)connection这是我的php代码:
<?php
if(isset($_REQUEST["myVariable"])) {
echo $_REQUEST["myVariable"];
}
else echo '$_REQUEST["myVariable"] not found';
?>那么到底出了什么问题呢?当我启动应用程序时,它将立即崩溃,并显示以下输出:
**
**> 2012-04-09 22:52:16.630 NSURLconnextion[819:f803] *** Terminating app
> due to uncaught exception 'NSUnknownKeyException', reason:
> '[<NSURLRequest 0x6b32bd0> setValue:forUndefinedKey:]: this class is
> not key value coding-compliant for the key myVariable.'
> *** First throw call stack: (0x13c8022 0x1559cd6 0x13c7ee1 0x9c0022 0x931f6b 0x931edb 0x2d20 0xd9a1e 0x38401 0x38670 0x38836 0x3f72a
> 0x10596 0x11274 0x20183 0x20c38 0x14634 0x12b2ef5 0x139c195 0x1300ff2
> 0x12ff8da 0x12fed84 0x12fec9b 0x10c65 0x12626 0x29dd 0x2945) terminate
> called throwing an exception****
我猜,这意味着这一行出了问题:
[request setValue:@"Hello world !" forKey:@"myVariable"];如果我注释这一行,它实际上是有效的。
我的问题是:如何使用NSURLRequest和NSURLConnexion将数据发送到PHP?
谢谢你的帮助。
顺便说一句,我对服务器,PHP等知识了解很少。
发布于 2012-04-10 05:42:06
试试这个:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL
URLWithString:@"http://localhost:8888/testNSURL/index.php"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setHTTPMethod:@"POST"];
NSString *postString = @"myVariable=Hello world !";
[request setHTTPBody:[postString dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if (theConnection) {
receiveData = [NSMutableData data];
}发布于 2013-07-29 17:51:51
试试下面的代码,它是使用web服务(Json)的一种简单方法。
NSURL *url = [NSURL URLWithString:@"yourURL"];
NSMutableURLRequest *urlReq=[NSMutableURLRequest requestWithURL:url];
NSURLResponse *response;
NSError *error = nil;
NSData *receivedData = [NSURLConnection sendSynchronousRequest:urlReq
returningResponse:&response
error:&error];
if(error!=nil)
{
NSLog(@"web service error:%@",error);
}
else
{
if(receivedData !=nil)
{
NSError *Jerror = nil;
NSDictionary* json =[NSJSONSerialization
JSONObjectWithData:receivedData
options:kNilOptions
error:&Jerror];
if(Jerror!=nil)
{
NSLog(@"json error:%@",Jerror);
}
}
}希望这能有所帮助。
https://stackoverflow.com/questions/10080216
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