IOS之表视图添加索引

我们要实现的效果如下。

IOS之表视图添加索引

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

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

@interface IkrboyViewController5 : UIViewController{
NSMutableDictionary *dict;
} @end

2.在ControlView.m添加如下修改

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

  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. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  41. {
  42. static NSString *CellIdentifier = @"myTableCell";
  43. UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
  44. NSUInteger row = [indexPath row];
  45. NSUInteger section = [indexPath section];
  46. NSArray *arr;
  47. switch (section) {
  48. case 0:
  49. arr = [dict objectForKey:@"Group1"];
  50. break;
  51. case 1:
  52. arr = [dict objectForKey:@"Group2"];
  53. break;
  54. case 2:
  55. arr = [dict objectForKey:@"Group3"];
  56. break;
  57. default:
  58. break;
  59. }
  60. NSDictionary *rowDict = [arr objectAtIndex:row];
  61. cell.textLabel.text =  [rowDict objectForKey:@"itemName"];
  62. NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);
  63. NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];
  64. cell.imageView.image = [UIImage imageNamed:imagePath];
  65. NSLog(@"cell.image.image  =  %@",imagePath);
  66. cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
  67. return cell;
  68. }
  69. //选中Cell响应事件
  70. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
  71. [tableView deselectRowAtIndexPath:indexPath animated:YES];//选中后的反显颜色即刻消失
  72. NSUInteger row = [indexPath row];
  73. NSUInteger section = [indexPath section];
  74. NSArray *arr;
  75. switch (section) {
  76. case 0:
  77. arr = [dict objectForKey:@"Group1"];
  78. break;
  79. case 1:
  80. arr = [dict objectForKey:@"Group2"];
  81. break;
  82. case 2:
  83. arr = [dict objectForKey:@"Group3"];
  84. break;
  85. default:
  86. break;
  87. }
  88. NSDictionary *rowDict = [arr objectAtIndex:row];
  89. NSString *userName =  [rowDict objectForKey:@"itemName"];
  90. NSLog(@"userName=%@",userName);
  91. }
//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);
}
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