我有三个ViewControllers。首先我打开thirdViewController，然后在thirdViewController中打开secondViewController。我使用segue来执行seondViewController，但是id不起作用。
#import "thirdViewController.h"
#import "ViewController.h"
#import "DetailViewController.h"
#import "secondViewController.h"
@interface thirdViewController (){
NSDictionary *currencies;
NSMutableArray *arrayCurrenciesKeys;
NSMutableData *webData;
NSURLConnection *connection ;
NSMutableArray *array;
NSMutableArray *temp;
}
@end
@implementation thirdViewController
@synthesize tableView,cityname;
- (void)viewDidLoad
{
[super viewDidLoad];
self.title=@"Типи валют";
[[self tableView]setDelegate:self];
[[self tableView]setDataSource:self];
array=[[NSMutableArray alloc]init];
NSURL *url =[NSURL URLWithString:@"http:resources.finance.ua/ua/public/currency-cash.json"];
NSURLRequest *request =[NSURLRequest requestWithURL:url];
connection= [NSURLConnection connectionWithRequest:request delegate:self];
if(connection)
{
webData=[[NSMutableData alloc] init];
}
tableView.backgroundColor=[UIColor clearColor];
tableView.alpha=0.9;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
return [array count];
}
-(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier =@"Cell"; UITableViewCell *cell =[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(!cell)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text=[array objectAtIndex:indexPath.row];
return cell;
}
-(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[webData setLength:0];
}
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[webData appendData:data];
}
-(void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"Error");
}
-(void) connectionDidFinishLoading:(NSURLConnection *)connection
{
NSDictionary *allDataDictionary = [NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
NSDictionary *feed =[allDataDictionary objectForKey:@"organizations";
for(NSDictionary *diction1 in feed){
NSString *label1 = [diction1 objectForKey:@"cityId"];
[temp addObject:label1];
NSString *label2 =[[allDataDictionary objectForKey: @"cities" ] objectForKey:[NSString stringWithFormat:@"%@",label1]];
if(![array containsObject:label2]){
[array addObject:label2];}
else{
;
}
[[self tableView]reloadData];
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[self performSegueWithIdentifier:@"Banks" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"Banks"]) {
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
我还在故事板中添加了segue标识符。我也尝试用导航控制器来呈现它，但它也不起作用。