iOS新手...我正在尝试使用搜索栏下载NSMutableArray表进行搜索，或者需要从mysql表中进行搜索...这让我疯狂的是下面的代码...任何帮助都会是理解
#import "VendorViewController.h"
#import "VendLocation.h"
#import "VendorDetailController.h"
@interface VendorViewController ()
{
VendorModel *_VendorModel; NSMutableArray *_feedItems; VendLocation *_selectedLocation; UIRefreshControl *refreshControl;
}
@property (nonatomic, weak) IBOutlet UISearchBar *searchBar;
@end
@implementation VendorViewController
//@synthesize item;
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Vendors";
self.searchBar.hidden = YES;
self.searchBar.delegate = self;
self.searchBar.barTintColor = [UIColor clearColor];
//self.searchBar.barTintColor = [UIColor orangeColor];
_feedItems = [[NSMutableArray alloc] init];
_VendorModel = [[VendorModel alloc] init];
_VendorModel.delegate = self;
[_VendorModel downloadItems];
#pragma mark Bar Button
UIBarButtonItem *searchItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(searchButton:)];
NSArray *actionButtonItems = @[searchItem];
self.navigationItem.rightBarButtonItems = actionButtonItems;
#pragma mark Table Refresh
UIView *refreshView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
[self.tableView insertSubview:refreshView atIndex:0]; //the tableView is a IBOutlet
refreshControl = [[UIRefreshControl alloc] init];
refreshControl.backgroundColor = [UIColor grayColor];
refreshControl.tintColor = [UIColor whiteColor];
[refreshControl addTarget:self action:@selector(reloadDatas) forControlEvents:UIControlEventValueChanged];
NSMutableAttributedString *refreshString = [[NSMutableAttributedString alloc] initWithString:@"Refreshing"];
//add date to refresh
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"MMM d, h:mm a"];
NSString *lastUpdated = [NSString stringWithFormat:@"Last updated on %@", [formatter stringFromDate:[NSDate date]]];
refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:lastUpdated];
[refreshString addAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]} range:NSMakeRange(0, refreshString.length)];
[refreshView addSubview:refreshControl];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
**#pragma mark - Search
- (void)searchButton:(id)sender{
[self.searchBar becomeFirstResponder];
self.searchBar.hidden = NO;
//[self.listTableView resignFirstResponder];
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{
self.searchBar.hidden = YES;
}
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
if(searchText.length == 0)
{
isFilltered = NO;
} else {
isFilltered = YES;
filteredString = [[NSMutableArray alloc]init];
for(NSString *vendorName in _feedItems)
{
NSRange vendorNameRange = [vendorName rangeOfString:searchText options:NSCaseInsensitiveSearch];
if(vendorNameRange.location != NSNotFound) {
[filteredString addObject:vendorName];
}
}
}
[self.listTableView reloadData];
}**
#pragma mark - Table
-(void)reloadDatas {
[refreshControl endRefreshing];
}
-(void)itemsDownloaded:(NSMutableArray *)items
{ // This delegate method will get called when the items are finished downloading
_feedItems = items;
[self.listTableView reloadData];
}
#pragma mark Table Delete Button
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView
editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
return UITableViewCellEditingStyleDelete;
}
- (void) setEditing:(BOOL)editing
animated:(BOOL)animated{
[super setEditing:editing
animated:animated];
[self.listTableView setEditing:editing
animated:animated];
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
if (editingStyle == UITableViewCellEditingStyleDelete) {
[_feedItems removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:@[indexPath]
withRowAnimation:UITableViewRowAnimationLeft];
[self.tableView reloadData];
/*
NSError *error = nil;
if (![tableView save:&error]) {
NSLog(@"Can't Delete! %@ %@", error, [error localizedDescription]);
return;
} */
}
}
#pragma mark TableView Delegate Methods
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (isFilltered) {
return [filteredString count];
}
return _feedItems.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
VendLocation *item = _feedItems[indexPath.row];
static NSString *CellIdentifier = @"BasicCell";
UITableViewCell *myCell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
myCell.layer.cornerRadius = 5;
myCell.layer.masksToBounds = YES;
if (myCell == nil) {
myCell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; }
if (!isFilltered) {
myCell.textLabel.text = item.vendorName;
myCell.detailTextLabel.text = item.vendorNo;
//Retreive an image
UIImage *myImage = [UIImage imageNamed:@"DemoCellImage"];
[myCell.imageView setImage:myImage];
} else {
myCell.textLabel.text = [filteredString objectAtIndex:indexPath.row];
myCell.detailTextLabel.text = nil;
}
return myCell;
}
#pragma mark Tableheader
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return 55.0;
}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
NSString *newString = [NSString stringWithFormat:@"VENDOR \n%lu", (unsigned long) _feedItems.count];
NSString *newString1 = [NSString stringWithFormat:@"NASDAQ \n4,727.35"];
NSString *newString2 = [NSString stringWithFormat:@"DOW \n17,776.80"];
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 0)];
tableView.tableHeaderView = view; //makes header move with tablecell
[view setBackgroundColor:[UIColor clearColor]];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(12, 3, tableView.frame.size.width, 45)];
[label setFont:[UIFont systemFontOfSize:12]];
[label setTextColor:[UIColor whiteColor]];
label.numberOfLines = 0;
NSString *string = newString;
[label setText:string];
[view addSubview:label];
UIView* separatorLineView = [[UIView alloc] initWithFrame:CGRectMake(12, 45, 60, 1.5)];
separatorLineView.backgroundColor = [UIColor redColor];
[view addSubview:separatorLineView];
UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(85, 3, tableView.frame.size.width, 45)];
label1.numberOfLines = 0;
[label1 setFont:[UIFont systemFontOfSize:12]];
[label1 setTextColor:[UIColor whiteColor]];
NSString *string1 = newString1;
[label1 setText:string1];
[view addSubview:label1];
UIView* separatorLineView1 = [[UIView alloc] initWithFrame:CGRectMake(85, 45, 60, 1.5)];
separatorLineView1.backgroundColor = [UIColor redColor];
[view addSubview:separatorLineView1];
UILabel *label2 = [[UILabel alloc] initWithFrame:CGRectMake(158, 3, tableView.frame.size.width, 45)];
label2.numberOfLines = 0;
[label2 setFont:[UIFont systemFontOfSize:12]];
[label2 setTextColor:[UIColor whiteColor]];
NSString *string2 = newString2;
[label2 setText:string2];
[view addSubview:label2];
UIView* separatorLineView2 = [[UIView alloc] initWithFrame:CGRectMake(158, 45, 60, 1.5)];
separatorLineView2.backgroundColor = [UIColor redColor];
[view addSubview:separatorLineView2];
return view;
}
这是我的标题
#import <UIKit/UIKit.h>
#import "VendorModel.h"
@interface VendorViewController : UIViewController <UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate, VendorModelProtocol>
{
// NSMutableArray *_feedItems;
NSMutableArray *filteredString;
BOOL isFilltered;
}
@property (weak, nonatomic) IBOutlet UITableView *listTableView;
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@end
将代码更改为textDidChange
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
if(searchText.length == 0)
{
isFilltered = NO;
} else {
isFilltered = YES;
filteredString = [[NSMutableArray alloc]init];
for(VendLocation* vendor in _feedItems)
{
NSRange stringRange = [vendor.vendorName rangeOfString:searchText options:NSCaseInsensitiveSearch];
if(stringRange.location != NSNotFound) {
[filteredString addObject:vendor];
}
}
}
[self.tableView reloadData];
}
我改变了过滤器，这段代码仍然没有运气击中钥匙并崩溃
if(searchText.length == 0)
{
isFilltered = NO;
[filteredString removeAllObjects];
[filteredString addObjectsFromArray:_feedItems];
} else {
isFilltered = YES;
// filteredString = [[NSMutableArray alloc]init];
[filteredString removeAllObjects];
for(NSString* string in _feedItems)
{
NSRange stringRange = [string rangeOfString:searchText options:NSCaseInsensitiveSearch];
if(stringRange.location != NSNotFound) {
[filteredString addObject:string];
}
}
}
[self.tableView reloadData];
答案 0 :(得分：0)
如果您已经下载了包含数据的NSMutableArray，那么您的搜索可能只包括搜索数组并过滤掉不匹配的条目。你不必回到MySQL。