IOS开发之表视图添加索引

我们要实现的效果如下。

1.修改ControlView.h，即添加变量dict，用于存储TabelView的数据源。

Cpp代码  

1. #import <UIKit/UIKit.h>  
2.   
3. @interface IkrboyViewController5 : UIViewController{  
4.     NSMutableDictionary *dict;  
5. }  
6.   
7. @end  

#import <UIKit/UIKit.h>

@interface IkrboyViewController5 : UIViewController{
    NSMutableDictionary *dict;
}

@end

 2.在ControlView.m添加如下修改

Cpp代码  

1. - (void)viewDidLoad  
2. {  
3.     [super viewDidLoad];  
4.     [self initTableViewData];  
5.     // Do any additional setup after loading the view.  
6. }  
7.   
8. -(void)initTableViewData{  
9.     NSBundle *bundle = [NSBundle mainBundle];  
10.     NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"];  
11.     NSArray *dataArr = [[NSArray alloc] initWithContentsOfFile:plistPath];  
12.     //将所有数据分为三组  
13.     NSMutableArray *arr1 = [NSMutableArray array];  
14.     NSMutableArray *arr2 = [NSMutableArray array];  
15.     NSMutableArray *arr3 = [NSMutableArray array];  
16.       
17.     dict = [NSMutableDictionary dictionary];  
18.     [dict setObject:arr1 forKey:@"Group1"];  
19.     [dict setObject:arr2 forKey:@"Group2"];  
20.     [dict setObject:arr3 forKey:@"Group3"];  
21.       
22.     //设置划分数据的依据，即根据index分三组，index为0-1的为第一组，2-4为第二组，5为第三组  
23.     for(NSInteger index = 0; index < [dataArr count]; index++){  
24.         NSDictionary *item = [dataArr objectAtIndex:index];  
25.         if(index<2){  
26.             [arr1 addObject:item];  
27.         }  
28.         else if(index>=2&&index<5){  
29.             [arr2 addObject:item];  
30.         }  
31.         else if(index>=5){  
32.             [arr3 addObject:item];  
33.         }  
34.     }  
35. }  

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self initTableViewData];
	// Do any additional setup after loading the view.
}

-(void)initTableViewData{
    NSBundle *bundle = [NSBundle mainBundle];
    NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"];
    NSArray *dataArr = [[NSArray alloc] initWithContentsOfFile:plistPath];
    //将所有数据分为三组
    NSMutableArray *arr1 = [NSMutableArray array];
    NSMutableArray *arr2 = [NSMutableArray array];
    NSMutableArray *arr3 = [NSMutableArray array];
    
    dict = [NSMutableDictionary dictionary];
    [dict setObject:arr1 forKey:@"Group1"];
    [dict setObject:arr2 forKey:@"Group2"];
    [dict setObject:arr3 forKey:@"Group3"];
    
    //设置划分数据的依据，即根据index分三组，index为0-1的为第一组，2-4为第二组，5为第三组
    for(NSInteger index = 0; index < [dataArr count]; index++){
        NSDictionary *item = [dataArr objectAtIndex:index];
        if(index<2){
            [arr1 addObject:item];
        }
        else if(index>=2&&index<5){
            [arr2 addObject:item];
        }
        else if(index>=5){
            [arr3 addObject:item];
        }
    }
}

 3.初始化TableView

Cpp代码  

1. //分为多少个分组  
2. - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView  
3. {  
4.     return [[dict allKeys] count];  
5. }  
6. //每个分组的数据单元个数  
7. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section  
8. {  
9.     switch(section)  
10.     {  
11.         case 0:  
12.         {  
13.             return [[dict objectForKey:@"Group1"] count];  
14.         }  
15.         case 1:  
16.         {  
17.             return [[dict objectForKey:@"Group2"] count];  
18.         }  
19.         case 2:  
20.         {  
21.             return [[dict objectForKey:@"Group3"] count];  
22.         }  
23.     }  
24.     return 0;  
25. }  
26. //分组的标题，不实现下面的方法，不显示分组标题  
27. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section  
28. {  
29.     //dict allKeys取出的key arr无顺序，需进行排序  
30.     NSArray *arr = [[dict allKeys] sortedArrayUsingSelector:@selector(compare:)];  
31.     return [arr objectAtIndex:section];  
32. }  
33. //列表右侧的索引提示，不实现下面的方法，不显示右侧索引  
34. -(NSArray *) sectionIndexTitlesForTableView: (UITableView *) tableView  
35. {  
36.     //dict allKeys取出的key arr无顺序，需进行排序  
37.     NSArray *arr = [[dict allKeys] sortedArrayUsingSelector:@selector(compare:)];  
38.     return arr;  
39. }  
40.   
41. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  
42. {  
43.     static NSString *CellIdentifier = @"myTableCell";  
44.     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];  
45.       
46.     NSUInteger row = [indexPath row];  
47.     NSUInteger section = [indexPath section];  
48.     NSArray *arr;  
49.       
50.     switch (section) {  
51.         case 0:  
52.             arr = [dict objectForKey:@"Group1"];  
53.             break;  
54.         case 1:  
55.             arr = [dict objectForKey:@"Group2"];  
56.             break;  
57.         case 2:  
58.             arr = [dict objectForKey:@"Group3"];  
59.             break;  
60.         default:  
61.             break;  
62.     }  
63.       
64.     NSDictionary *rowDict = [arr objectAtIndex:row];  
65.     cell.textLabel.text =  [rowDict objectForKey:@"itemName"];  
66.     NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);  
67.       
68.     NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];  
69.     cell.imageView.image = [UIImage imageNamed:imagePath];  
70.     NSLog(@"cell.image.image  =  %@",imagePath);  
71.       
72.     cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;  
73.       
74.     return cell;  
75. }  
76.   
77. //选中Cell响应事件  
78. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{  
79.     [tableView deselectRowAtIndexPath:indexPath animated:YES];//选中后的反显颜色即刻消失  
80.     NSUInteger row = [indexPath row];  
81.     NSUInteger section = [indexPath section];  
82.     NSArray *arr;  
83.       
84.     switch (section) {  
85.         case 0:  
86.             arr = [dict objectForKey:@"Group1"];  
87.             break;  
88.         case 1:  
89.             arr = [dict objectForKey:@"Group2"];  
90.             break;  
91.         case 2:  
92.             arr = [dict objectForKey:@"Group3"];  
93.             break;  
94.         default:  
95.             break;  
96.     }  
97.       
98.     NSDictionary *rowDict = [arr objectAtIndex:row];  
99.     NSString *userName =  [rowDict objectForKey:@"itemName"];  
100.     NSLog(@"userName=%@",userName);  
101. }  

//分为多少个分组
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return [[dict allKeys] count];
}
//每个分组的数据单元个数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    switch(section)
    {
        case 0:
        {
            return [[dict objectForKey:@"Group1"] count];
        }
        case 1:
        {
            return [[dict objectForKey:@"Group2"] count];
        }
        case 2:
        {
            return [[dict objectForKey:@"Group3"] count];
        }
    }
    return 0;
}
//分组的标题，不实现下面的方法，不显示分组标题
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    //dict allKeys取出的key arr无顺序，需进行排序
    NSArray *arr = [[dict allKeys] sortedArrayUsingSelector:@selector(compare:)];
	return [arr objectAtIndex:section];
}
//列表右侧的索引提示，不实现下面的方法，不显示右侧索引
-(NSArray *) sectionIndexTitlesForTableView: (UITableView *) tableView
{
    //dict allKeys取出的key arr无顺序，需进行排序
    NSArray *arr = [[dict allKeys] sortedArrayUsingSelector:@selector(compare:)];
    return arr;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"myTableCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
    NSUInteger row = [indexPath row];
    NSUInteger section = [indexPath section];
    NSArray *arr;
    
    switch (section) {
        case 0:
            arr = [dict objectForKey:@"Group1"];
            break;
        case 1:
            arr = [dict objectForKey:@"Group2"];
            break;
        case 2:
            arr = [dict objectForKey:@"Group3"];
            break;
        default:
            break;
    }
    
    NSDictionary *rowDict = [arr objectAtIndex:row];
    cell.textLabel.text =  [rowDict objectForKey:@"itemName"];
    NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);
    
    NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];
    cell.imageView.image = [UIImage imageNamed:imagePath];
    NSLog(@"cell.image.image  =  %@",imagePath);
    
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    
    return cell;
}

//选中Cell响应事件
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];//选中后的反显颜色即刻消失
    NSUInteger row = [indexPath row];
    NSUInteger section = [indexPath section];
    NSArray *arr;
    
    switch (section) {
        case 0:
            arr = [dict objectForKey:@"Group1"];
            break;
        case 1:
            arr = [dict objectForKey:@"Group2"];
            break;
        case 2:
            arr = [dict objectForKey:@"Group3"];
            break;
        default:
            break;
    }
    
    NSDictionary *rowDict = [arr objectAtIndex:row];
    NSString *userName =  [rowDict objectForKey:@"itemName"];
    NSLog(@"userName=%@",userName);
}