【发布时间】：2013-12-27 23:28:24
【问题描述】：
我尝试按照红色方块所示的图片进行操作。
我需要通过点击一个用户打开一个盘和DatePicker。为此，我使用 Expandable UITableView (http://www.wannabegeek.com/?p=338)。但我无法理解如何在该部分执行此操作可能是一个元素（例如 DatePicker），并且通过单击该部分可以准确显示 DatePicker。现在，如果至少有两个元素，那么字符串不会显示为一个部分，而只是一个不包含更多元素的字符串。而且好像我没有改变原型单元格的大小并没有改变我完全看不到DatePicker。现在我的 DatePicker 在单元格的文本后面（这是合乎逻辑的）
两个主要问题：如何更改单元格的大小，这是正常看到 DatePicker 以及如何使列表中只有一项 在 StoryBoard 中，我看到：
在模拟器中：
可能会更容易做出决定？
我使用代码：
// Exampl2eController.m
#import "Example2Controller.h"
@implementation Example2Controller
@synthesize dataModel = _dataModel;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
_dataModel = [NSMutableArray arrayWithObjects:
[NSMutableArray arrayWithObjects:@"Row 1a", @"Row 2a", @"Row 3a", nil],
[NSMutableArray arrayWithObjects:@"Row 1b", @"Row 2b", nil],
[NSMutableArray arrayWithObjects:@"Row 1c", @"Row 2c", @"Row 3c", @"Row 4c", nil],
[NSMutableArray arrayWithObjects:@"Row 1d", nil],
nil];
}
- (NSInteger)numberOfSectionsInTableView:(ExpandableTableView *)tableView
{
// Return the number of sections.
return [_dataModel count];
}
- (NSInteger)tableView:(ExpandableTableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if ([_dataModel count] == 0) {
return 0;
}
// Return the number of rows in the section.
return [[_dataModel objectAtIndex:section] count];
}
- (UITableViewCell *)tableView:(ExpandableTableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"RowCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell.textLabel.text = [[_dataModel objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
// just change the cells background color to indicate group separation
cell.backgroundView = [[UIView alloc] initWithFrame:CGRectZero];
cell.backgroundView.backgroundColor = [UIColor colorWithRed:232.0/255.0 green:243.0/255.0 blue:1.0 alpha:1.0];
return cell;
}
- (UITableViewCell *)tableView:(ExpandableTableView *)tableView cellForGroupInSection:(NSUInteger)section
{
static NSString *CellIdentifier = @"GroupCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell.textLabel.text = [NSString stringWithFormat: @"Group %d (%d)", section, [self tableView:tableView numberOfRowsInSection:section]];
// We add a custom accessory view to indicate expanded and colapsed sections
cell.accessoryView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"ExpandableAccessoryView"] highlightedImage:[UIImage imageNamed:@"ExpandableAccessoryView"]];
UIView *accessoryView = cell.accessoryView;
if ([[tableView indexesForExpandedSections] containsIndex:section]) {
accessoryView.transform = CGAffineTransformMakeRotation(M_PI);
} else {
accessoryView.transform = CGAffineTransformMakeRotation(0);
}
return cell;
}
// The next two methods are used to rotate the accessory view indicating whjether the
// group is expanded or now
- (void)tableView:(ExpandableTableView *)tableView willExpandSection:(NSUInteger)section {
UITableViewCell *headerCell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:section]];
[UIView animateWithDuration:0.3f animations:^{
headerCell.accessoryView.transform = CGAffineTransformMakeRotation(M_PI - 0.00001); // we need this little hack to subtract a small amount to make sure we rotate in the correct direction
}];
}
- (void)tableView:(ExpandableTableView *)tableView willContractSection:(NSUInteger)section {
UITableViewCell *headerCell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:section]];
[UIView animateWithDuration:0.3f animations:^{
headerCell.accessoryView.transform = CGAffineTransformMakeRotation(0);
}];
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(ExpandableTableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
- (BOOL)tableView:(ExpandableTableView *)tableView canEditSection:(NSInteger)section {
return YES;
}
// Override to support editing the table view.
- (void)tableView:(ExpandableTableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView beginUpdates];
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[[_dataModel objectAtIndex:indexPath.section] removeObjectAtIndex:indexPath.row];
// cellVisibleForIndexPath: isn't strictly required sicne the table view will determine if the
// the row at that indexPath is actually visible, and do the appropriate manipulation
if ([(ExpandableTableView *)tableView cellVisibleForIndexPath:indexPath]) {
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
if ([[_dataModel objectAtIndex:indexPath.section] count] == 0) {
[_dataModel removeObjectAtIndex:indexPath.section];
[tableView deleteSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade];
} else {
[tableView reloadSectionCellsAtIndexes:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade];
}
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
[tableView endUpdates];
}
// Override to support rearranging the table view.
- (void)tableView:(ExpandableTableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(ExpandableTableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
- (BOOL)tableView:(ExpandableTableView *)tableView canRemoveSection:(NSUInteger)section {
return YES;
}
@end
【问题讨论】：
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你好。你解决了这个问题吗？
标签： ios iphone objective-c uitableview