因爲你需要修改代碼。我將解釋，
步驟：
- 初始化基礎上，按字母順序，按字母順序排列和過濾器使用源陣列。
- 現在dataSource字典包含按字母過濾的源數據數組。
- 現在沒有。部分將沒有。字典中的數組。
- 爲數據源字典中的每個部分加載數據源數組。
初始化字母陣列和數據源陣列
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",nil];
dataSource = [[NSMutableDictionary alloc]initWithCapacity:[alphabet count]];
sourceArray = [NSArray arrayWithObjects:@"Azz",@"ax",@"aje",@"B",@"C",@"Ca",@"D",@"DD",@"E",@"EE",@"F",@"G",@"F", nil];
篩選源陣列和作爲字母表
for(int i = 0; i<[alphabet count]; i ++)
{
NSArray *filteredArray = [sourceArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF BEGINSWITH[C] %@", [alphabet objectAtIndex:i]]];
if([filteredArray count]>0)
dataSource setObject:[filteredArray sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)] forKey:[alphabet objectAtIndex:i]]; // Dictionary containing sorted array of data with key as alphabets
}
數據與關鍵值添加到字典和U需要定製沒有。段和行的委託方法。查看示例代碼。
像這樣
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return [[dataSource allKeys] count];
}
- (NSString *)tableView:(UITableView *)aTableView titleForHeaderInSection:(NSInteger)section
{
return [[dataSource allKeys] objectAtIndex:section];
}
使用此代碼，它的工作對我來說很好。
整個源代碼：
- (void)viewDidLoad
{
[super viewDidLoad];
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",nil];
dataSource = [[NSMutableDictionary alloc]initWithCapacity:[alphabet count]];
sourceArray = [NSArray arrayWithObjects:@"Azz",@"ax",@"aje",@"B",@"C",@"Ca",@"D",@"DD",@"E",@"EE",@"F",@"G",@"F", nil];
for(int i = 0; i<[alphabet count]; i ++)
{
NSArray *filteredArray = [sourceArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF BEGINSWITH[C] %@", [alphabet objectAtIndex:i]]];
if([filteredArray count]>0)
[dataSource setObject:[filteredArray sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)] forKey:[alphabet objectAtIndex:i]]; // Dictionary containing sorted array of data with key as alphabets
}
NSLog(@"Filtered Array %@", dataSource);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return [[dataSource allKeys] count];
}
- (NSString *)tableView:(UITableView *)aTableView titleForHeaderInSection:(NSInteger)section
{
return [[dataSource allKeys] objectAtIndex:section];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[dataSource objectForKey:[[dataSource allKeys] objectAtIndex:section]] count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 20;
}
- (BOOL)tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath
{
return NO;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
originalSource = [dataSource objectForKey:[[dataSource allKeys] objectAtIndex:indexPath.section]];
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [NSString stringWithFormat:@"%@",[originalSource objectAtIndex:indexPath.row]];
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
輸出會是這樣。
希望這個代碼將幫助ü。我知道它很難理解整個代碼。有任何疑問隨時問。