演示表单元格中日期对象的格式化显示,以及使用 UIDatePicker 编辑这些值。
As a delegate to this table, the sample uses the method "didSelectRowAtIndexPath" to open the UIDatePicker control.
For iOS 6.x and earlier, UIViewAnimation is used for sliding the UIDatePicker up on-screen and down off-screen. For iOS 7.x, the UIDatePicker is added in-line to the table view.
The action method of the UIDatePicker will directly set the NSDate property of the custom table cell. In addition, this sample shows how to use NSDateFormatter class to achieve the custom cell's date-formatted appearance.
@interface StaticTableViewController: UITableViewController
@property (weak, nonatomic) IBOutlet UITableViewCell *dateTitleCell; // cell that will open the date picker. This is linked from the story board
@property (nonatomic, assign, getter = isDateOpen) BOOL dateOpen;
@end
@implementation StaticTableViewController
-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
// This is the index path of the date picker cell in the static table
if (indexPath.section == 1 && indexPath.row == 1 && !self.isDateOpen){
return 0;
}
return [super tableView:tableView heightForRowAtIndexPath:indexPath];
}
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
[tableView beginUpdates];
if (cell == self.dateTitleCell){
self.dateOpen = !self.isDateOpen;
}
[tableView reloadData];
[self.tableView endUpdates];
}
// Return Data to delegate: either way is fine, although passing back the object may be more efficient
// [_delegate imageSelected:currentRecord.image withTitle:currentRecord.title withCreator:currentRecord.creator];
// [_delegate animalSelected:currentRecord];
if (indexPath.section == 1 && indexPath.row == 0) { // this is my date cell above the picker cell
editingStartTime = !editingStartTime;
[UIView animateWithDuration:.4 animations:^{
int height = 0;
if (editingStartTime) {
height = 162;
}
UITableViewCell* temp = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:1 inSection:1]];
[temp setFrame:CGRectMake(temp.frame.origin.x, temp.frame.origin.y, temp.frame.size.width, height)];
for (int x = 2; x < [tableView numberOfSections]; x++) {
for (int y = 0; y < [tableView numberOfRowsInSection:x]; y++) {
UITableViewCell* temp = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:y inSection:x]];
int y_coord = temp.frame.origin.y-162;
if (editingStartTime) {
y_coord = temp.frame.origin.y+162;
}
[temp setFrame:CGRectMake(temp.frame.origin.x, y_coord, temp.frame.size.width, temp.frame.size.height)];
}
}
}completion:^(BOOL finished){
[self.tableView reloadData];
}];
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.section == 0 && indexPath.row == 1) { // this is my date cell above the picker cell
editingStartTime = !editingStartTime;
}
}