私はObjective Cを初めて使用し、しばらく問題を抱えていました。回答を調べたり、チュートリアルを見たりしましたが、問題の解決策を見つけることができませんでした。多分それは私の顔の前にあり、私はそれを見ていません...それは私のUISearchバーのNSRangeと関係があると思います。しかし、私は 100% 確実ではありません。
国の辞書のキーを持つ配列を検索しようとしています。いくつかの NSLog を設定しました。キーを保存するために設定した配列にキーが入っていることがわかり、以下のエラーが表示されます。 .
これについての私の理解では、countryKeys は 5 であるため、インデックス 4 が存在するはずです。そうではありませんか? しかし、それは 0 .. 3 を示しています。これが、NSRange を間違って使用していると考えている理由です。これまでにいくつかの UISearchBar と For ループのチュートリアルを見てきましたが、For ループを理解しているので、NSRange を理解する必要があると思います。
私の思考過程や私が言及したことを理解していない場合はお知らせください..
Filtered Countries (
ATE,
ARE,
USA,
JAP,
CAN
)
*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 4 beyond bounds [0 .. 3]'
-
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize dictTableView, mySearchBar, countriesInRegion, filteredCountries, isFiltered, regionCodes, countryKey, countryKeys, countryInfo, sortedKeysArray, regionCode, dict1;
- (void)viewDidLoad
{
[super viewDidLoad];
dict1 = [[NSMutableDictionary alloc] init];
NSMutableDictionary *subDict = [[NSMutableDictionary alloc] initWithObjects:[NSArray arrayWithObjects:@"United States",@"US",@"USA", @"NAC", nil]
forKeys: [NSArray arrayWithObjects:@"countryName", @"countryAbbrev", @"countryID", @"countryRegion", nil]];
[dict1 setObject:subDict forKey:@"USA"];
subDict = [[NSMutableDictionary alloc] initWithObjects:[NSArray arrayWithObjects:@"Canada", @"CA", @"CAN", @"NAC", nil]
forKeys: [NSArray arrayWithObjects:@"countryName", @"countryAbbrev", @"countryID", @"countryRegion", nil]];
[dict1 setObject:subDict forKey:@"CAN"];
subDict = [[NSMutableDictionary alloc] initWithObjects:[NSArray arrayWithObjects:@"Japan", @"JP", @"JAP", @"EAS", nil]
forKeys: [NSArray arrayWithObjects:@"countryName", @"countryAbbrev", @"countryID", @"countryRegion", nil]];
[dict1 setObject:subDict forKey:@"JAP"];
subDict = [[NSMutableDictionary alloc] initWithObjects:[NSArray arrayWithObjects:@"United Arab Emirates", @"AE", @"ARE", @"MEA", nil]
forKeys: [NSArray arrayWithObjects:@"countryName", @"countryAbbrev", @"countryID", @"countryRegion", nil]];
[dict1 setObject:subDict forKey:@"ARE"];
subDict = [[NSMutableDictionary alloc] initWithObjects:[NSArray arrayWithObjects:@"Antigua and Barbuda", @"AG", @"ATE", @"LCN", nil]
forKeys: [NSArray arrayWithObjects:@"countryName", @"countryAbbrev", @"countryID", @"countryRegion", nil]];
[dict1 setObject:subDict forKey:@"ATE"];
regionCodes = [[NSMutableDictionary alloc] init];
countryKeys = [dict1 allKeys];
NSLog(@"countryKeys %@", countryKeys);
sortedKeysArray = [countryKeys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
for (int i = 0; i < [sortedKeysArray count]; i++) {
countryKey = [sortedKeysArray objectAtIndex:i];
countryInfo = [dict1 objectForKey:countryKey]; // NSLog(@"returning countryKey to countryInfo %@", countryInfo);
regionCode = [countryInfo objectForKey:@"countryRegion"]; // NSLog(@" adding countryRegion Key to regionCode %@", regionCode);
// NSLog(@"the contents of countryInfo is %@", countryInfo);
if (![regionCodes objectForKey:regionCode]) {
countriesInRegion = [[NSMutableArray alloc] init];
[regionCodes setObject:countriesInRegion forKey:regionCode];
[countriesInRegion addObject:countryInfo]; // NSLog(@"if adding countryInfo to initialCountries %@", countryInfo);
}
else{
countriesInRegion = [regionCodes objectForKey:regionCode];
[countriesInRegion addObject:countryInfo]; // NSLog(@"else adding countryInfo to initialCountries %@", countryInfo);
}
}
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if (isFiltered == NO)
{
return countryInfo.count;
}
else
{
return filteredCountries.count;
}
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSArray *sortKey = [regionCodes allKeys];
sortedKeysArray = [sortKey sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
return [sortedKeysArray objectAtIndex:section];
}
- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;
{
NSString *regionKey = [[regionCodes allKeys] objectAtIndex:section];
countriesInRegion = [regionCodes objectForKey:regionKey];
if (isFiltered == NO)
{
return countriesInRegion.count;
}
else
{
return filteredCountries.count;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
{
UITableViewCell *cell = nil;
cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:@"Cell"];
UILabel *countryNameLabel = [[UILabel alloc] initWithFrame:(CGRectMake(10, 0, 220, 44))];
[countryNameLabel setBackgroundColor:[UIColor clearColor]];
UILabel *countryAbbrevLabel = [[UILabel alloc] initWithFrame:(CGRectMake(230, 0, 75, 44))];
[countryNameLabel setBackgroundColor:[UIColor clearColor]];
UILabel *countryIDLabel = [[UILabel alloc] initWithFrame:(CGRectMake(275, 0, 50, 44))];
[countryNameLabel setBackgroundColor:[UIColor clearColor]];
[cell.contentView addSubview:countryNameLabel];
[cell.contentView addSubview:countryAbbrevLabel];
[cell.contentView addSubview:countryIDLabel];
}
NSArray *regionKeys = [regionCodes allKeys];
NSString *regionKey = [regionKeys objectAtIndex:indexPath.section];
countriesInRegion = [regionCodes objectForKey:regionKey];
NSLog(@"Countries in Region %@", countriesInRegion);
countryInfo = [countriesInRegion objectAtIndex:indexPath.row];
NSArray *subviews = [cell.contentView subviews];
UILabel *nameLabel = [subviews objectAtIndex:0];
UILabel *abbrevLabel = [subviews objectAtIndex:1];
UILabel *idLabel = [subviews objectAtIndex:2];
// NSLog(@"6 - Countries in Region %@", countriesInRegion);
if (isFiltered == NO)
{
nameLabel.text = [countryInfo objectForKey:@"countryName"];
abbrevLabel.text = [countryInfo objectForKey:@"countryAbbrev"];
idLabel.text = [countryInfo objectForKey:@"countryID"];
// NSLog(@"5 - Our list of countries: %@", nameLabel.text);
// NSLog(@"Country Info %@",countryInfo);
}
else
{
nameLabel.text = [filteredCountries objectAtIndex:2];
abbrevLabel.text = [filteredCountries objectAtIndex:1];
idLabel.text = [filteredCountries objectAtIndex:0];
NSLog(@"4 - Here are your results: %@", filteredCountries);
}
return cell;
}
#pragma mark - UISearchBarDelegate Methods
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
if (searchText.length == 0) {
isFiltered = NO;
}
else
{
isFiltered = YES;
NSLog(@"You entered %@", searchText);
filteredCountries = [[NSMutableArray alloc] init];
countryKeys = [dict1 allKeys];
NSLog(@"countryKeys %@", countryKeys);
for (int i = 0; i < countryKeys.count; i++) {
countryKey = [countryKeys objectAtIndex:i];
NSLog(@"country key is %@", countryKey);
{
NSRange countryNameRange = [countryKey rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (countryNameRange.location !=NSNotFound)
{
[filteredCountries addObject:countryKey];
NSLog(@"Filtered Countries %@", filteredCountries);
}
}
}
}
[dictTableView reloadData];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
[mySearchBar resignFirstResponder];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
@end