我给你的代码我有问题调用uipicker的方法，但没有调用请尽快帮助我。 提前谢谢
我给你描述我的项目uipicker deligae方法没有被调用
请帮帮我
在demosecondcontroller.m
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
StateList*objstatelist= [[StateList alloc]init];
[objstatelist callingStatelist];
});
});
StateList.m(nsobject)
-(void)callingStatelist{
@try {
CheckConnection*obj=[[CheckConnection alloc]init];
UrlService*objurlservice= [[UrlService alloc]init];
[objurlservice url];
[obj internet ];
if (obj.conection==true) {
NSString* soapMessage= @"<?xml version='1.0' encoding='utf-8'?> <soap:Envelope xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'><soap:Body><GetStateList xmlns='http://tempuri.org'><webreq>%@</webreq></GetStateList></soap:Body></soap:Envelope>";
// create a url to your asp.net web service.
NSURL *tmpURl=[NSURL URLWithString:[NSString stringWithFormat:@"%@",objurlservice.urlstring]];
// create a request to your asp.net web service.
NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:tmpURl];
// add http content type - to your request
[theRequest addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
// add SOAPAction - webMethod that is going to be called
[theRequest addValue:@"http://tempuri.org/GetStateList" forHTTPHeaderField:@"SOAPAction"];
// count your soap message lenght - which is required to be added in your request
NSString *msgLength=[NSString stringWithFormat:@"%lu",(unsigned long)[soapMessage length]];
// add content length
[theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];
// set method - post
[theRequest setHTTPMethod:@"POST"];
// set http request - body
[theRequest setHTTPBody:[soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
// establish connection with your request & here delegate is self, so you need to implement connection's methods
NSURLConnection *con=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
// if connection is established
if(con)
{
responseData=[[NSMutableData data] init];
// here -> NSMutableData *myWebData; -> declared in .h file
}
}
else{
UIAlertView* alert = [[UIAlertView alloc]initWithTitle:@"Smart24x7" message:@"Check your internet connection." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];
}
}
@catch (NSException *exception) {
NSLog(@"exeption%@",exception);
}
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
responseData = [[NSMutableData alloc]init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[responseData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
responseData = nil;
responseString = [responseString stringByReplacingOccurrencesOfString:@">"
withString:@">"];
responseString = [responseString stringByReplacingOccurrencesOfString:@"<"
withString:@"<"];
NSData* data = [responseString dataUsingEncoding:NSUTF8StringEncoding];
NSLog(@"response%@",responseString);
responcearray = [[NSMutableArray alloc]init];
parsar = [[NSXMLParser alloc] initWithData: data];
[parsar setDelegate: (id)self];
[parsar setShouldResolveExternalEntities:YES];
[parsar parse];
}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *) namespaceURI qualifiedName:(NSString *)qName attributes: (NSDictionary *)attributeDict
{
elementValue= elementName;
if ([elementValue isEqualToString:@"item"])
{
// elementValue = [[NSMutableString alloc] init];
}
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
[responcearray addObject:string];
}
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
DEMOSecondViewController*obj=[[DEMOSecondViewController alloc]init];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
[obj get_Statelist_Responce:responcearray];
});
});
}
//in demosecondcontroller.m
-(void)get_Statelist_Responce:(NSArray*)responce_ArrayForstate
{
stateListarray= [[NSMutableArray alloc]init];
stateListarray=responce_ArrayForstate;
[self CreateTable];
}
-(void)CreateTable
{
pickerView.hidden=YES;
done.hidden=YES;
doneclicked.hidden=YES;
pickerView = [[UIPickerView alloc] init];
[pickerView setDataSource: (id)self];
[pickerView setDelegate: (id)self];
[pickerView.layer setBorderWidth:2.0];
pickerView.layer.borderColor = [UIColor grayColor].CGColor;
float screenWidth = [UIScreen mainScreen].bounds.size.height;
pickerView.layer.cornerRadius=5; // Set the picker's frame. We set the y coordinate to 50px.
[pickerView setFrame: CGRectMake(0.0, screenWidth-200, 320.0, 180)];
pickerView.showsSelectionIndicator = YES;
[pickerView setBackgroundColor:[UIColor whiteColor]];
// OK, we are ready. Add the picker in our view.
[self.view addSubview: pickerView];
[cityalert dismissWithClickedButtonIndex:0 animated:YES];
[statealert dismissWithClickedButtonIndex:0 animated:YES];
doneclicked = [UIButton buttonWithType:UIButtonTypeRoundedRect];
doneclicked .backgroundColor= [UIColor blackColor];
[doneclicked setFrame:CGRectMake(0, screenWidth-200, 320, 30)];
[doneclicked addTarget:self action:@selector(doneClickedpicker) forControlEvents:UIControlEventTouchUpInside];
[doneclicked setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
doneclicked.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
[self.view addSubview:doneclicked];
[doneclicked setTitle:@"Done" forState:UIControlStateNormal];
doneclicked.contentEdgeInsets = UIEdgeInsetsMake(0, 270, 0, 0);
_datePickerView.hidden=YES;
done.hidden=YES;
}
// not called these method
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
// please help me
答案 0 :(得分：0)
您可以使用
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:
^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (!connectionError) {
//enter code here
}
})];
并从异步线程获取该Web服务的响应。
在您的代码中，您在UI线程上调用了线程和委托的urlconnection，因此这就产生了问题。对于异步调用使用上面的方法，从UI /主线程调用该Web服务类。 可能这可以帮到你。
修改***** 你可以替换
-(void)callingStatelist{
// code
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
responseData = [[NSMutableData alloc]init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[responseData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
}
方法
-(void)callingStatelist{
@try {
CheckConnection*obj=[[CheckConnection alloc]init];
UrlService*objurlservice= [[UrlService alloc]init];
[objurlservice url];
[obj internet ];
if (obj.conection==true) {
NSString* soapMessage= @"<?xml version='1.0' encoding='utf-8'?> <soap:Envelope xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'><soap:Body><GetStateList xmlns='http://tempuri.org'><webreq>%@</webreq></GetStateList></soap:Body></soap:Envelope>";
// create a url to your asp.net web service.
NSURL *tmpURl=[NSURL URLWithString:[NSString stringWithFormat:@"%@",objurlservice.urlstring]];
// create a request to your asp.net web service.
NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:tmpURl];
// add http content type - to your request
[theRequest addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
// add SOAPAction - webMethod that is going to be called
[theRequest addValue:@"http://tempuri.org/GetStateList" forHTTPHeaderField:@"SOAPAction"];
// count your soap message lenght - which is required to be added in your request
NSString *msgLength=[NSString stringWithFormat:@"%lu",(unsigned long)[soapMessage length]];
// add content length
[theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];
// set method - post
[theRequest setHTTPMethod:@"POST"];
// set http request - body
[theRequest setHTTPBody:[soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
// establish connection with your request & here delegate is self, so you need to implement connection's methods
NSURLConnection *con=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:
^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (!connectionError) {
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
data = nil;
responseString = [responseString stringByReplacingOccurrencesOfString:@">"
withString:@">"];
responseString = [responseString stringByReplacingOccurrencesOfString:@"<"
withString:@"<"];
NSData* data = [responseString dataUsingEncoding:NSUTF8StringEncoding];
NSLog(@"response%@",responseString);
responcearray = [[NSMutableArray alloc]init];
parsar = [[NSXMLParser alloc] initWithData: data];
[parsar setDelegate: (id)self];
[parsar setShouldResolveExternalEntities:YES];
[parsar parse];
}
})];
}
else{
UIAlertView* alert = [[UIAlertView alloc]initWithTitle:@"Smart24x7" message:@"Check your internet connection." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];
}
}
@catch (NSException *exception) {
NSLog(@"exeption%@",exception);
}
}