我有一个UIViewController,允许我查看和编辑类的信息.
它只分配一次,但它的行数,部分和数据将根据用户选择的值传递给它.
例如.在这里,它正在编辑一个名称&类型属性(表的标题视图太大..我这样做,所以你会看到下面的怪异)
所以我输入一个名字,一切都很好.然后我点击地址属性,细节视图现在看起来像这样:
到目前为止一切都好.如果我单击取消并返回编辑名称属性,它显示正常.
问题是这个.我像这样向下滚动地址表:
然后单击“保存/取消”.现在当我回去编辑name属性时,tableview看起来像这样!
就好像通过表格的标题视图仍然可以看到上一个表格.?
我的viewWillAppear:这个uiviewcontroller的方法如下所示:
- (void)viewWillAppear:(BOOL)animated {
NSLog(@"Retain count of poolcopy is %d\n\n", [self.thePoolFacilityCopy retainCount] );
//This will be a reference to find our which pool Instance field we are editing.
self.sectionFromParentTable = self.cellPath.section;
//This will only be used by the arrays
self.rowFromPreviousTable = self.cellPath.row;
NSString *sectionName;
switch (self.sectionFromParentTable) {
case KNameIndex:
sectionName = @"name";
break;
case KAddressIndex:
sectionName = @"address";
break;
case KPhoneNumberIndex:
sectionName = @"phone";
break;
case KWebAddressIndex:
sectionName = @"url";
break;
case KPricesIndex:
sectionName = @"prices";
break;
case KPoolIndex:
sectionName = @"pools";
default:
break;
}
self.title = [NSString stringWithFormat:@"Editing %@", sectionName];
// use an empty view to position the cells in the vertical center of the portion of the view not covered by
// the keyboard
if (self.sectionFromParentTable == KPhoneNumberIndex || self.sectionFromParentTable == KWebAddressIndex) {
UIView *singleSectionHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 60)];
self.theTableView.tableHeaderView = singleSectionHeaderView;
[singleSectionHeaderView release];
self.theTableView.tableFooterView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 10)]autorelease];
}
else if (self.sectionFromParentTable == KAddressIndex) {
UIView *addressHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 0)];
self.theTableView.tableHeaderView = addressHeaderView;
[addressHeaderView release];
self.theTableView.tableFooterView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 250)]autorelease];
}
else if (self.sectionFromParentTable == KPoolIndex) {
UIView *poolHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 2)];
self.theTableView.tableHeaderView = poolHeaderView;
[poolHeaderView release];
self.theTableView.tableFooterView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 10)]autorelease];
}
else {
UIView *doubleSectionHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 30)];
self.theTableView.tableHeaderView = doubleSectionHeaderView;
[doubleSectionHeaderView release];
self.theTableView.tableFooterView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 10)]autorelease];
}
[self.theTableView reloadData];
}
在表格看起来混乱的图片中,即使有3个单元格可见(2个正常单元格和一个奇怪的单元格),也只会调用两次cellForRowAtIndexPath方法.怪异的单元格随着滚动而移动,仍然可以点击.
我可以通过在此方法中注释掉以下行来解决此问题.但是,每当有人想要编辑细节时我都不想分配新的控制器:
- (PoolFacilityDetailEditController *)childController {
// Instantiate the editing view controller if necessary.
// if (childController == nil) {
PoolFacilityDetailEditController *controller = [[PoolFacilityDetailEditController alloc] initWithNibName:@"PoolFacilityDetailEditController" bundle:nil];
self.childController = controller;
[controller release];
// }
return childController;
}
最佳答案 没有查看所有代码很难说,但是你有可能不正确地回收你的tableview单元格吗?您必须为每个呈现不同的单元格分配不同的reuseIdentifier.如果标题单元格被重新用作细节单元格(反之亦然),那将导致渲染中的一些奇怪现象.