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NHAutoCompleteTextField.m
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NHAutoCompleteTextField.m
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//
// NHAutoCompleteTextBox.m
// NHAutoCompleteTextBox
//
// Created by Shahan on 12/12/2014.
// Copyright (c) 2014 Shahan. All rights reserved.
//
#import "NHAutoCompleteTextField.h"
#import "UIView+NHExtension.h"
@implementation NHAutoCompleteTextField
@synthesize suggestionListView;
@synthesize suggestionTextField;
@synthesize dataSourceDelegate;
@synthesize dataFilterDelegate;
@synthesize dropDownDirection;
@synthesize filterString;
#pragma mark - Initializer functions
-(id)init
{
if(self = [super init])
{
[self initialize];
}
return self;
}
-(id)initWithCoder:(NSCoder *)aDecoder
{
if(self = [super initWithCoder:aDecoder])
{
[self initialize];
}
return self;
}
- (id)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame])
{
[self initialize];
}
return self;
}
#pragma mark - Helper functions
-(void)initialize
{
// Background appears behind the following textfield
UIView *backGroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
[self addSubview:backGroundView];
[backGroundView setBackgroundColor:[UIColor lightGrayColor]];
suggestionTextField = [[UITextField alloc] initWithFrame:CGRectMake(kListLeftMargin / 2,
kTextMarginTop,
self.frame.size.width - kListLeftMargin,
self.frame.size.height - (kTextMarginTop * 2))];
[suggestionTextField setBackgroundColor:[UIColor textBoxColor]];
[suggestionTextField setDelegate:self];
[self addSubview:suggestionTextField];
[self setBackgroundColor:[UIColor clearColor]];
dropDownDirection = NHDropDownDirectionDown;
}
-(void)adjustListFrameForDirection:(NHDropDownDirection)direction
{
if(direction == NHDropDownDirectionUp)
{
[self.suggestionListView setY:self.frame.origin.y - kExpansionHeight + 0.5];
}
else
{
[self.suggestionListView setY:self.frame.origin.y + self.frame.size.height - 0.5];
}
[((UIViewController *)self.dataSourceDelegate).view bringSubviewToFront:suggestionListView];
}
-(void)setupSuggestionList
{
if(!suggestionListView)
{
suggestionListView = [[UITableView alloc] initWithFrame:CGRectMake(self.frame.origin.x + kListLeftMargin,
self.frame.origin.y + suggestionTextField.frame.origin.y +
suggestionTextField.frame.size.height + kListSeparatorHeight,
self.frame.size.width - (kListLeftMargin * 2),
kExpansionHeight)];
[suggestionListView setDelegate:self];
[suggestionListView setDataSource:self];
[suggestionListView setBackgroundColor:[UIColor textBoxColor]];
[[suggestionListView backgroundView] setAlpha:0.0f];
[suggestionListView setShowsVerticalScrollIndicator:NO];
[suggestionListView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
[suggestionListView setBounces:NO];
}
}
#pragma mark - UITableView delegate functions
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if([dataSourceDelegate respondsToSelector:@selector(autoCompleteTextBox:numberOfRowsInSection:)])
{
return [dataSourceDelegate autoCompleteTextBox:self numberOfRowsInSection:section];
}
return 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if([dataSourceDelegate respondsToSelector:@selector(autoCompleteTextBox:cellForRowAtIndexPath:)])
{
UITableViewCell *cell = [dataSourceDelegate autoCompleteTextBox:self cellForRowAtIndexPath:indexPath];
return cell;
}
return nil;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[suggestionTextField setText:[[[self.suggestionListView cellForRowAtIndexPath:indexPath] textLabel] text]];
[self endEditing:YES];
}
#pragma mark - UITextfield delegate functions
-(void)textFieldDidBeginEditing:(UITextField *)textField
{
[self setupSuggestionList];
[suggestionListView setHidden:NO];
// Add list to the super view.
if(self.dataSourceDelegate && [self.dataSourceDelegate isKindOfClass:UIViewController.class])
{
[((UIViewController *)self.dataSourceDelegate).view addSubview:suggestionListView];
}
// Setup list as per the given direction
[self adjustListFrameForDirection:dropDownDirection];
}
-(void)textFieldDidEndEditing:(UITextField *)textField
{
[suggestionListView setHidden:YES];
if([dataSourceDelegate respondsToSelector:@selector(autoCompleteTextBox:textFieldDidEndEditing:)]){ //fh: ajout de ce delegate
[dataSourceDelegate autoCompleteTextBox:self textFieldDidEndEditing:textField];
}
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
if([textField isFirstResponder])
{
[textField resignFirstResponder];
}
return YES;
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
return YES;
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
filterString = suggestionTextField.text;
if([string length] == 0)
{
filterString = [filterString substringToIndex:MAX([filterString length] - 1, 0)];
}
else
{
filterString = [NSString stringWithFormat:@"%@%@", suggestionTextField.text, string];
}
if([self.dataFilterDelegate respondsToSelector:@selector(shouldFilterDataSource:)] &&
[self.dataFilterDelegate shouldFilterDataSource:self])
{
if([self.dataFilterDelegate respondsToSelector:@selector(autoCompleteTextBox:didFilterSourceUsingText:)])
{
[self.dataFilterDelegate autoCompleteTextBox:self didFilterSourceUsingText:filterString];
[self.suggestionListView reloadData];
}
}
return YES;
}
@end