初学objective-c,自己写的一个demo，有不足之处请指正：
效果图：
核心代码：
- (void)viewDidLoad
{
[super viewDidLoad];
NSArray *array = [[NSArray alloc] initWithObjects:@"你好", @"BFlower",
@"CGrass", @"DFence", @"EHouse", @"FTable", @"GChair",
@"HBook", @"ISwing" ,@"JWang" ,@"KDong" ,@"LNi" ,@"MHao" ,@"Na" ,@"Oa" ,@"Pa" ,@"Qa" ,@"Ra" ,@"Sa" ,@"Ta" ,@"Ua" ,@"Va" ,@"Wa" ,@"Xa" ,@"Ya" ,@"Za", nil];
self.listarray = array;
NSLog(@"listarryCount:%d",[listarray count]);
secLabelArray = [[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];
NSArray *arrayA = [[NSArray alloc] initWithObjects:@"测试A1",@"测试A2", nil];
NSArray *arrayB = [[NSArray alloc] initWithObjects:@"测试B1",@"测试B2",@"测试B3", nil];
NSArray *arrayC = [[NSArray alloc] initWithObjects:@"测试C1",@"测试C2",@"测试C3",@"测试C4", nil];
NSArray *arrayD = [[NSArray alloc] initWithObjects:@"测试D1",@"测试D2",@"测试D3",@"测试D4",@"测试D5", nil];
NSArray *arrayE = [[NSArray alloc] initWithObjects:@"测试E1",@"测试E2",@"测试E3",@"测试E4",@"测试E5",@"测试E6", nil];
NSArray *arrayF = [[NSArray alloc] initWithObjects:@"测试F1",@"测试F2",@"测试F3",@"测试F4",@"测试F5",@"测试F6",@"测试F7", nil];
NSArray *arrayG = [[NSArray alloc] initWithObjects:@"测试G1",@"测试G2",@"测试G3",@"测试G4",@"测试G5",@"测试G6", nil];
arrayDictKey = [[NSArray alloc] initWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G", nil];
arrayDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:arrayA,[arrayDictKey objectAtIndex:0],
arrayB,[arrayDictKey objectAtIndex:1],
arrayC,[arrayDictKey objectAtIndex:2],
arrayD,[arrayDictKey objectAtIndex:3],
arrayE,[arrayDictKey objectAtIndex:4],
arrayF,[arrayDictKey objectAtIndex:5],
arrayG,[arrayDictKey objectAtIndex:6],
nil];
NSLog(@"arrayrow:%d",[[arrayDict objectForKey:[arrayDictKey objectAtIndex:1]] count]);
tableView=[[UITableView alloc]initWithFrame:CGRectMake(0, 0, 320, 460)];
[tableView setDelegate:self];
[tableView setDataSource:self];
[self.view addSubview:tableView];
[tableView release];
// Do any additional setup after loading the view.
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)aTableView
{
//* 出现几组
//if(aTableView == self.tableView) return 27;
return [arrayDict count];
}
//*字母排序搜索
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
//* 字母索引列表
/*NSMutableArray *toBeReturned = [[NSMutableArray alloc]init];
for(char c= 'A';c<='Z';c++)
[toBeReturned addObject:[NSString stringWithFormat:@"%c",c]];*/
return arrayDictKey;
/*NSMutableArray *newarr=[[NSMutableArray alloc]initWithArray:listarray];
[newarr addObject:@"{search}"]; //等价于[arr addObject:UITableViewIndexSearch];
return newarr;*/
}
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{
//搜索时显示按索引第几组
NSInteger count = 0;
NSLog(@"%@",title);
for(NSString *character in arrayDictKey)
{
if([character isEqualToString:title])
{
return count;
}
count ++;
}
return count;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
/*if([listarray count]==0)
{
return @"";
}*/
//return [listarray objectAtIndex:section]; //*分组标签
return [arrayDictKey objectAtIndex:section];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
//return [self.listarray count]; //*每组要显示的行数
//NSInteger i = [[listarray objectAtIndex:section] ]
NSInteger i = [[arrayDict objectForKey:[arrayDictKey objectAtIndex:section]] count];
return i;
}
-(UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath{
//返回类型选择按钮
return UITableViewCellAccessoryDisclosureIndicator; //每行右边的图标
}
- (UITableViewCell *)tableView:(UITableView *)tableview
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *TableSampleIdentifier = @"TableSampleIdentifier";
UITableViewCell *cell = [tableview dequeueReusableCellWithIdentifier:
TableSampleIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:TableSampleIdentifier];
}
NSUInteger row = [indexPath row];
NSUInteger sectionMy = [indexPath section];
NSLog(@"sectionMy:%d",sectionMy);
cell.textLabel.text = [[arrayDict objectForKey:[arrayDictKey objectAtIndex:sectionMy]] objectAtIndex:row]; //每一行显示的文字
NSString *str= [NSString stringWithFormat: @"%d", row];
UIImage *image = [UIImage imageNamed:str];
cell.imageView.image = image;
UIImage *highLighedImage = [UIImage imageNamed:@"1.png"];
cell.imageView.highlightedImage = highLighedImage; //选中一行时头部图片的改变
return cell;
}
//划动cell是否出现del按钮
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES; //是否需要删除图标
}
//编辑状态(不知道干什么用)
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath
{
[self viewDidLoad];
}
//选中时执行的操作
- (NSIndexPath *)tableView:(UITableView *)tableView
willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSUInteger row = [indexPath row];
if (row%2 == 0) {
NSUInteger row = [indexPath row];
NSString *rowValue = [listarray objectAtIndex:row];
NSString *message = [[NSString alloc] initWithFormat:
@"You selected %@", rowValue];
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Row Selected!"
message:message
delegate:nil
cancelButtonTitle:@"Yes I Did"
otherButtonTitles:nil];
[alert show];
}
return indexPath;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
//这里控制值的大小
return 50.0; //控制行高
}
总结：有些东西没用之前觉得这个会很难，很复杂，做过后才发现，其实关键在于理解，多看多实践这样才能提高...多看看我的demo，研究一下哈...