IOS开发（51）之UITableView建立索引搜索

1 前言

2 代码实例

#import <UIKit/UIKit.h>

@interface ZYViewController : UITableViewController
<UITableViewDataSource, UITableViewDelegate>
//设置索引标题
@property(nonatomic,retain)NSMutableArray *indexArray;
//设置每个section下的cell内容
@property(nonatomic,retain)NSArray *dataArray1;
@property(nonatomic,retain)NSArray *dataArray2;
@property(nonatomic,retain)NSArray *dataArray3;
@end

@synthesize dataArray1,dataArray2,dataArray3;
@synthesize indexArray;

- (void)viewDidLoad
{
[super viewDidLoad];
NSArray *array1=[[NSArray alloc] initWithObjects:@"A",@"B",@"C",@"D",@"E" ,nil];
NSArray *array2=[[NSArray alloc] initWithObjects:@"F",@"G",@"H",@"I",@"J", nil];
NSArray *array3=[[NSArray alloc] initWithObjects:@"K",@"L",@"M",@"N",@"O", nil];
self.dataArray1=array1;
self.dataArray2 = array2;
self.dataArray3 = array3;
//给数组赋值
NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:5];
self.indexArray = array;
[array release];
[indexArray addObjectsFromArray:array1];
[indexArray addObjectsFromArray:array2];
[indexArray addObjectsFromArray:array3];
[array1 release];
[array2 release];
[array3 release];
}
//设置Section的Header的值
- (NSString *)tableView:(UITableView *)tableView

titleForHeaderInSection:(NSInteger)section {

NSString *key = [indexArray objectAtIndex:section];

return key;

}

#pragma mark -

#pragma mark Table View Data Source Methods

//设置表格的索引数组
-(NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
return self.indexArray;
}
////允许数据源告知必须加载到Table View中的表的Section数。
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{

return 3;
}
//设置表格的行数为数组的元素个数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (section==0) {
return [self.dataArray1 count];
}else if(section==1)
return dataArray2.count;
else
return dataArray3.count;

}
//每一行的内容为数组相应索引的值
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if(indexPath.section==0)
//设置单元格的字符串内容
cell.textLabel.text=[self->dataArray1 objectAtIndex:indexPath.row];
else if(indexPath.section==1)
//设置单元格的字符串内容
cell.textLabel.text=[self->dataArray2 objectAtIndex:indexPath.row];
else
//设置单元格的字符串内容
cell.textLabel.text=[self->dataArray3 objectAtIndex:indexPath.row];
return cell;
}
-(void)dealloc{
[indexArray release];
[dataArray1 release];
[dataArray2 release];
[dataArray3 release];
[super dealloc];
}

3 结语