我有一个使用UITableView的应用程序,其中包含产品名称,这些产品也会根据其首字母分成各自的部分。
这是我的代码:
- (void)viewDidLoad
{
[super viewDidLoad];
//Initialize alphabet array
m_Alphabet = [[NSArray alloc]initWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"J",@"K", @"L",@"M",@"N",@"O",@"P",@"Q",@"R",@"S",@"T",@"U",@"V",@"W",@"X",@"Y",@"Z",@"Other", nil];
//Initialize alphabet distionary of arrays
m_AlphabetDictionary = [[NSMutableArray alloc]init];
//Populate distionary with a mutable array for each character
//in the alphabet (plus one "Other" category)
for (int i = 0; i < 27; i++)
[m_AlphabetDictionary insertObject:[[NSMutableArray alloc] init] atIndex: i];
// The number of products in the database
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSMutableArray *tempArray = [[NSMutableArray alloc] init];
//For each product in the appDelgates products
for (Product *product in appDelegate.m_Products){
if ([product.category isEqualToString:productType]){
[tempArray addObject:product];
//firstLetter is equal to the first letter of the products name
NSString * l_FirstLetter = [product.name substringToIndex:1];
//convert firstString to uppercase
l_FirstLetter = [l_FirstLetter uppercaseString];
//The added flag ensures objects whose first letter isn't a letter
//are added to array 26
bool added = NO;
for(int i=0; i<[m_Alphabet count]; i++){
//If the first letter of product name is equal to the letter at index i in theAlphabet
if ([l_FirstLetter isEqualToString:[m_Alphabet objectAtIndex:i]]) {
//Add product to section array for that letter
[[m_AlphabetDictionary objectAtIndex:i] addObject:product];
added = YES;
}
}
//If product hasn't been added to array, add it to "Others" category
if(!added)
[[m_AlphabetDictionary objectAtIndex:26] addObject:product];
}
}
//Set navigation controller title
self.title = productType;
}
//Number of sections is equal to the length of the m_Alphabet array
//Letters A-Z plus "Other"
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [m_Alphabet count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[m_AlphabetDictionary objectAtIndex:section] count];
}
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
return m_Alphabet;
}
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{
return [m_Alphabet indexOfObject:title];
}
- (NSString *)tableView:(UITableView *)aTableView titleForHeaderInSection:(NSInteger)section
{
if ([[m_AlphabetDictionary objectAtIndex:section] count]==0)
return nil;
return [m_Alphabet objectAtIndex:section];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"Cell for row");
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if([self.productType isEqualToString:@"All"]){
Product *product = (Product *) [appDelegate.m_Products objectAtIndex:indexPath.row];
cell.textLabel.text = product.name;
// Configure the cell.
return cell;
}
else {
//Instead of using appDelegate.products use the new array that will be filled
//by the numberOfReowsInSection method
Product *product = (Product *)[[m_AlphabetDictionary objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
cell.textLabel.text = product.name;
// Configure the cell.
return cell;
}
}
我要做的是在我的表格视图的顶部添加一个搜索栏,其行为就像iPhone手机联系人应用程序中“所有联系人”部分中的搜索栏一样。 I.E.当我搜索时,所有部分都会消失,只显示搜索结果,直到搜索栏再次为空。
有人能指出我正确的方向吗?
谢谢,
杰克
答案 0 :(得分:3)
您似乎需要使用UISearchDisplayController,这很可能是联系人应用程序使用的内容(以及邮件,地图,Safari和音乐)。它将自身显示为表格视图叠加,可以包含或不包含范围栏(您的选择),并根据搜索栏的文本过滤结果。可以找到一个涉及界面构建器的简单教程here,并且可以找到一个苹果示例sans-IB here。