我正在尝试访问 REST api 以查看用户是否有效。我知道 connectionDidFinishLoading
运行,但我不确定如何检查响应 (xml)。请指教。
signIn
函数开始运作
- (IBAction)signIn:(id)sender;
{
[emailError setHidden:YES];
if([emailAddressTxt text] && [passwordTxt text]) {
// send user/pass to server for validation
if([self NSStringIsValidEmail:[emailAddressTxt text]]) {
NSString *post = [NSString stringWithFormat:@"Email=%@&Password=%@", emailAddressTxt.text, passwordTxt.text];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"http://www.mySite.com/validate.php"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:postData];
[NSURLConnection connectionWithRequest:request delegate:self];
}
} else {
// give error dialogue
[emailError setText:@"User not found"];
[emailError setHidden:NO];
}
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
//[signInData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)d {
//[signInData appendData:d];
// updated to:
signInData = (NSMutableData *)d;
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
// Fail..
[emailError setText:@"Connection Error"];
[emailError setHidden:NO];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *responseText = [[NSString alloc] initWithData:signInData encoding:NSUTF8StringEncoding];
NSLog(@"%@", @"check");
NSLog(@"%@", responseText);
}
// an example response would be:
// <string xmlns="http://thedomain.com/">invalid login</string>
最佳答案
一般解析XML
你会用 NSXMLParser
,但字符串响应很简单,如“<string xmlns="http://thedomain.com/">invalid login</string>
”,我假设有效登录看起来像这样:“<string xmlns="http://thedomain.com/">valid login</string>
”
如果是这种情况,您只需查找包含字符串 @"valid login"
的响应即可。但不包含 @"invalid login"
if (([responseText rangeOfString:@"invalid login"].location == NSNotFound) && ([responseText rangeOfString:@"valid login"].location != NSNotFound)){
// Congrats valid
}
如果(甚至更好)成功的响应是“<string xmlns="http://thedomain.com/">successful login</string>
”,那么 if 语句将变得更容易理解。
if ([responseText rangeOfString:@"successful login"].location != NSNotFound){
// Congrats valid
}
关于ios - xml 后加载 xml 响应,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8991630/