这是我的问题。我有一个uipickerview组件，其中包含数据，我希望索引值高于所选值。以下是以下示例。
proj1 proj2 proj3 假期 病假 proje4 - 选择 - proj5 proj6 proj7 proj8
-(void)Benefits
{
NSString *Benefitpost =[[NSString alloc] initWithFormat:@"username=%@",[self.projectpicker dataSource]];
NSString *Benefiturl = @"http:picker.com/GetBenefitTypes";
NSURL *url = [NSURL URLWithString:Benefiturl];
NSData *BenefitpostData = [Benefitpost dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *BenefitpostLength = [NSString stringWithFormat:@"%lu", (unsigned long)[BenefitpostData length]];
NSMutableURLRequest *Benefitrequest = [[NSMutableURLRequest alloc] init];
[Benefitrequest setURL:url];
[Benefitrequest setHTTPMethod:@"POST"];
[Benefitrequest setValue:BenefitpostLength forHTTPHeaderField:@"Content-Length"];
[Benefitrequest setValue:@"application/projectpicker" forHTTPHeaderField:@"Accept"];
[Benefitrequest setValue:@"application/jsonArray" forHTTPHeaderField:@"Content-Type"];
[Benefitrequest setHTTPBody:BenefitpostData];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *BenefiturlData=[NSURLConnection sendSynchronousRequest:Benefitrequest returningResponse:&response error:&error];
NSURLRequest *BenefiturlRequest = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReturnCacheDataElseLoad
timeoutInterval:30];
// Make synchronous request
BenefiturlData = [NSURLConnection sendSynchronousRequest:BenefiturlRequest
returningResponse:&response
error:&error];
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSString *BenefitresponseData = [NSJSONSerialization JSONObjectWithData:BenefiturlData
options:NSJSONReadingAllowFragments error:&error];
NSArray *Benefitentries = [NSJSONSerialization JSONObjectWithData:[BenefitresponseData dataUsingEncoding:NSUTF8StringEncoding]
options:0 error:&error];
if(!Benefitentries)
{
NSLog(@"Error : %@", error);
}
else{
for (NSDictionary *Benefitentry in Benefitentries) {
benID = [Benefitentries valueForKey:@"ID_LEAVES"];
BenefitNames = [Benefitentries valueForKey:@"NM_LEAVES"];
}
NSLog(@"BenefitNames : %@", BenefitNames);
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
[self loadprojects];
}
} else {
}
}
-(void)loadprojects
{
NSString *post =[[NSString alloc] initWithFormat:@"username=%@",[self.projectpicker dataSource]];
//NSString *pickername = [self.projectpicker dataSource];
//NSString *key = @"Da9s^a2Rp4na6R$ikiAsav3Is@niWsa";
//NSString *encrypteduname = [AESCrypt encrypt:pickername password:key];
// Code for Project loading
NSString *projecturltemp = @"http://picker.com/GetAssignedProjects";
NSString *str = [[NSUserDefaults standardUserDefaults] valueForKey:@"UserLoginIdSession"];
NSString *usrid = str;
NSString * projecturl =[NSString stringWithFormat:@"%@/%@",projecturltemp,usrid];
NSURL *url = [NSURL URLWithString:projecturl];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/projectpicker" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/jsonArray" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReturnCacheDataElseLoad
timeoutInterval:30];
// Make synchronous request
urlData = [NSURLConnection sendSynchronousRequest:urlRequest
returningResponse:&response
error:&error];
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSString *responseData =[NSJSONSerialization JSONObjectWithData:urlData
options:NSJSONReadingAllowFragments error:&error];
NSArray *entries = [NSJSONSerialization JSONObjectWithData:[responseData dataUsingEncoding:NSUTF8StringEncoding]
options:0 error:&error];
if(!entries)
{
NSLog(@"Error : %@", error);
}
else{
for (NSDictionary *entry in entries) {
projID = [entries valueForKey:@"ID_PROJECT"];
projectNames = [entries valueForKey:@"NM_PROJECT"];
}
randomSelection=[BenefitNames arrayByAddingObjectsFromArray:projectNames];
randomSelectionID = [benID arrayByAddingObjectsFromArray:projID];
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
}
} else {
}
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
int numberofRows = 0;
switch (component) {
case 0:
numberofRows = [randomSelection count];
[pickerView reloadComponent:1];
break;
case 1:
numberofRows = [taskNames count];
[pickerView reloadComponent:2];
break;
case 2:
numberofRows = [subtaskNames count];
break;
}
return numberofRows;
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *title;
if(component == 0) {
[pickerView reloadComponent:1];
[pickerView reloadComponent:2];
//[randomSelection addObjectsFromArray:projectNames];
title = [randomSelection objectAtIndex:row];
}
else if (component == 1){
[pickerView reloadComponent:2];
title = [taskNames objectAtIndex:row];
}
else{
title = [subtaskNames objectAtIndex:row];
}
return title;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
//NSLog(@"%@",myArrayString);
//NSLog(@"%@",myTaskArrayString);
if(component == 0){
NSNumber *myProjectArrayString = [randomSelectionID objectAtIndex:row];
lblProjects.text = [NSString stringWithFormat:@"%@",myProjectArrayString];
lblProjects.hidden = YES;
NSLog(@"Selected Color: %@. Index of selected color: %i", [randomSelection objectAtIndex:row], row);
//[NSString stringWithFormat:@"%d", row];
hdnlblProjects.text = [randomSelection objectAtIndex:[pickerView selectedRowInComponent:0]];
[self loadtasks];
[pickerView reloadComponent:1];
[pickerView reloadComponent:2];
}
//lblProjects.hidden = YES;
else if(component == 1)
{
NSNumber *myTaskArrayString = [taskID objectAtIndex:row];
lblTasks.text = [NSString stringWithFormat:@"%@",myTaskArrayString];
lblTasks.hidden = YES;
hdnlblTasks.text = [taskNames objectAtIndex:[pickerView selectedRowInComponent:1]];
[self loadsubtasks];
[pickerView reloadComponent:2];
}
else if(component == 2)
{
NSNumber *mysubtaskArrayString = [subtskID objectAtIndex:row];
lblSubTasks.text = [NSString stringWithFormat:@"%@",mysubtaskArrayString];
lblSubTasks.hidden = YES;
hdnlblSubTasks.text = [subtaskNames objectAtIndex:[pickerView selectedRowInComponent:2]];
//lblTasks.text = [taskNames objectAtIndex:[pickerView selectedRowInComponent:1]];
//lblTasks.text = [NSString stringWithFormat:@"%@", myTaskArrayString];
//lblSubTasks.text = [subtaskNames objectAtIndex:[pickerView selectedRowInComponent:2]];
}
}
所以当任何用户选择“--select--”时，我想得到--select--的索引位置。如何获得这个职位？因为proj1,2,3 ..是动态生成的，所以无法使用或修复它的静态值。请帮助我...