I my previous tutorial I have explained how to create iOS drop-down
http://androiddhina.blogspot.in/2016/05/ios-drop-down-like-android-part-
1.html.Here I am going to explain how to implement iOS drop-down in your application
Step 1)ViewController.h
#import <UIKit/UIKit.h>
#import "NIDropDown.h"
@interface ViewController : UIViewController<NIDropDownDelegate,UITextFieldDelegate>
{
IBOutlet UITextField *txtDropDown;
IBOutlet UITextField *txtDropDownNew;
NIDropDown *dropDown;
}
@property (retain, nonatomic) IBOutlet UITextField *txtDropDown;
@property (retain, nonatomic) IBOutlet UITextField *txtDropDownNew;
-(void)rel;
@end
Step 2)ViewController.m
#import "ViewController.h"
#import "NIDropDown.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize txtDropDown,txtDropDownNew;
- (void)viewDidLoad {
[super viewDidLoad];
txtDropDown.inputView = [[UIView alloc] initWithFrame:CGRectZero];
self. txtDropDown.delegate = self;
[self. txtDropDown setReturnKeyType:UIReturnKeyDone];
txtDropDownNew.inputView = [[UIView alloc] initWithFrame:CGRectZero];
self. txtDropDownNew.delegate = self;
[self. txtDropDownNew setReturnKeyType:UIReturnKeyDone];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) niDropDownDelegateMethod: (NIDropDown *) sender
{
[self rel];
}
-(void)rel{
dropDown = nil;
}
-(void)textFieldDidBeginEditing:(UITextField *)textField{
NSArray * arr = [[NSArray alloc] init];
if(textField == txtDropDown)
{
arr = [NSArray arrayWithObjects:@"Air" ,@"Ocean",@"Road" ,nil];
txtDropDown.text=@"";
[self myMethod:txtDropDown array:arr];
}
if(textField == txtDropDownNew)
{
arr = [NSArray arrayWithObjects:@"Export",@"Domestic",nil];
txtDropDownNew.text=@"";
[self myMethod:txtDropDownNew array:arr];
}
}
-(IBAction)textFieldReturn:(id)sender
{
[sender resignFirstResponder];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//hides keyboard when another part of layout was touched
[self.view endEditing:YES];
[super touchesBegan:touches withEvent:event];
}
- (void)myMethod:(UITextField*)textField array:(NSArray*)arr
{
CGFloat f ;
if(dropDown == nil)
{
if([arr count]==2)
{
f= 80;
}
else if(([arr count]==3))
{
f= 120;
}
else if(([arr count]==4))
{
f= 160;
}
else{
f= 200;
}
dropDown = [[NIDropDown alloc]showDropDown:textField :&f:arr:@"down"];
dropDown.delegate = self;
}
else {
[dropDown hideDropDown:textField];
[self rel];
}
}
@end
Happy Coding:)
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