我读过,创建一个索引的最佳方法(在uitableview一侧的a-z)是设置一个nsdiction数组,每个字典对应一个section,一个rowValue键包含一个数组.
NSDictionary
headerTitle => ‘A’
rowValues => {”Aardvark”,“Ape”,“Aquaman”}
NSDictionary
headerTitle => ‘B’
rowValues => {”Bat”,“Boot”,“Bubbles”} etc
但是,可以从所有行标题 – “{Aardvark”,“Aquaman”,“Bat”,“Bubbles”,“Cat”,“Cabbage”等)的数组中创建. ..？
解决方法
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *temp = [[NSMutableArray alloc] init];
NSMutableArray *temp2 = [[NSMutableArray alloc] init];
for(int i = 0; i < tableListArray.count; i++)
{
NSString *string = [tableListArray objectAtIndex:i];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:string forKey:@"Name"];
[dict setObject:[NSNumber numberWithInt:i] forKey:@"ID"];
NSString *firstString = [string substringToIndex:1];
if([temp2 containsObject:firstString] == NO || temp2.count == 0)
{
if(temp2.count != 0)
{
[temp addObject:temp2];
[temp2 release];
temp2 = [[NSMutableArray alloc] init];
}
[temp2 addObject:firstString];
}
[temp2 addObject:dict];
[dict release];
}
[temp addObject:temp2];
detailListArray = [[NSArray alloc] initWithArray:temp];
[temp release];
[temp2 release];
}
#pragma mark -
#pragma mark Table view data source
- (NSInteger)tableView:(UITableView *)tableView
sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{
int i = 0;
for(NSArray *array in detailListArray)
{
NSString *string = [array objectAtIndex:0];
if([string compare:title] == NSOrderedSame)
break;
i++;
}
return i;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return detailListArray.count;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSArray *array = [detailListArray objectAtIndex:section];
return [array objectAtIndex:0];
}
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
NSMutableArray *titleArray = [NSMutableArray array];
[titleArray addObject:@"A"];
[titleArray addObject:@"B"];
[titleArray addObject:@"C"];
[titleArray addObject:@"D"];
[titleArray addObject:@"E"];
[titleArray addObject:@"F"];
[titleArray addObject:@"G"];
[titleArray addObject:@"H"];
[titleArray addObject:@"I"];
[titleArray addObject:@"J"];
[titleArray addObject:@"K"];
[titleArray addObject:@"L"];
[titleArray addObject:@"M"];
[titleArray addObject:@"N"];
[titleArray addObject:@"O"];
[titleArray addObject:@"P"];
[titleArray addObject:@"Q"];
[titleArray addObject:@"R"];
[titleArray addObject:@"S"];
[titleArray addObject:@"T"];
[titleArray addObject:@"U"];
[titleArray addObject:@"V"];
[titleArray addObject:@"W"];
[titleArray addObject:@"X"];
[titleArray addObject:@"Y"];
[titleArray addObject:@"Z"];
return titleArray;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSArray *array = [detailListArray objectAtIndex:section];
return (array.count - 1);
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:@"CELL"] autorelease];
NSArray *array = [detailListArray objectAtIndex:indexPath.section];
NSDictionary *dict = [array objectAtIndex:indexPath.row + 1];
cell.textLabel.text = [dict objectForKey:@"Name"];
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSArray *array = [detailListArray objectAtIndex:indexPath.section];
NSDictionary *dict = [array objectAtIndex:indexPath.row + 1];
int entryID = [[dict objectForKey:@"ID"] intValue];
// Do what ever you want to do with the selected row here....
}
这是我在最近的一个项目中使用的代码.
