我有2个部分,每个部分有3行,如下所示:
搜索距离
250英尺
1000英尺
4000英尺
MAP TYPE
标准
卫星
混合
我想为每个部分的行添加一个复选标记,但是我的当前代码将取消选中整个表视图的所有可见单元格,并为选中的一行留下复选标记。换句话说,我将为整个表格设置一个复选标记(2个部分)。在这里,我发布了我的整个代码我有很多google,但似乎没有解决我的问题。任何人,请帮助纠正我的代码。提前谢谢。
#import "PAWSettingsViewController.h"
#import "PAWAppDelegate.h"
#import <Parse/Parse.h>
@interface PAWSettingsViewController ()
- (NSString *)distanceLabelForCell:(NSIndexPath *)indexPath;
- (PAWLocationAccuracy)distanceForCell:(NSIndexPath *)indexPath;
- (NSString *)maptypeLabelForCell:(NSIndexPath *)indexPath;
- (PAWMaptypeSelect)maptypeForCell:(NSIndexPath *)indexPath;
@property (nonatomic, assign) CLLocationAccuracy filterDistance;
@end
typedef enum {
kPAWSettingsTableViewDistance = 0,
kPAWSettingsTableViewMaptype,
kPAWSettingsTableViewNumberOfSections
} kPAWSettingsTableViewSections;
typedef enum {
kPAWSettingsTableViewDistanceSection250FeetRow = 0,
kPAWSettingsTableViewDistanceSection1000FeetRow,
kPAWSettingsTableViewDistanceSection4000FeetRow,
kPAWSettingsTableViewDistanceNumberOfRows
} kPAWSettingsTableViewDistanceSectionRows;
typedef enum {
kPAWSettingsTableViewMaptypeSectionStandardRow = 0,
kPAWSettingsTableViewMaptypeSectionSatelliteRow,
kPAWSettingsTableViewMaptypeSectionHybridRow,
kPAWSettingsTableViewMaptypeNumberOfRows
} kPAWSettingsTableViewMaptypeSectionRows;
@implementation PAWSettingsViewController
@synthesize tableView;
@synthesize filterDistance;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
PAWAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
self.filterDistance = appDelegate.filterDistance;
}
return self;
}
#pragma mark - Custom setters
// Always fault our filter distance through to the app delegate. We just cache it locally because it's used in the tableview's cells.
- (void)setFilterDistance:(CLLocationAccuracy)aFilterDistance {
PAWAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
appDelegate.filterDistance = aFilterDistance;
filterDistance = aFilterDistance;
}
#pragma mark - View lifecycle
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Private helper methods
- (NSString *)distanceLabelForCell:(NSIndexPath *)indexPath {
NSString *cellText = nil;
switch (indexPath.row) {
case kPAWSettingsTableViewDistanceSection250FeetRow:
cellText = @"250 feet";
break;
case kPAWSettingsTableViewDistanceSection1000FeetRow:
cellText = @"1000 feet";
break;
case kPAWSettingsTableViewDistanceSection4000FeetRow:
cellText = @"4000 feet";
break;
case kPAWSettingsTableViewDistanceNumberOfRows: // never reached.
default:
cellText = @"The universe";
break;
}
return cellText;
}
- (PAWLocationAccuracy)distanceForCell:(NSIndexPath *)indexPath {
PAWLocationAccuracy distance = 0.0;
switch (indexPath.row) {
case kPAWSettingsTableViewDistanceSection250FeetRow:
distance = 250;
break;
case kPAWSettingsTableViewDistanceSection1000FeetRow:
distance = 1000;
break;
case kPAWSettingsTableViewDistanceSection4000FeetRow:
distance = 4000;
break;
case kPAWSettingsTableViewDistanceNumberOfRows: // never reached.
default:
distance = 10000 * kPAWFeetToMiles;
break;
}
return distance;
}
- (NSString *)maptypeLabelForCell:(NSIndexPath *)indexPath {
NSString *cellText = nil;
switch (indexPath.row) {
case kPAWSettingsTableViewMaptypeSectionStandardRow:
cellText = @"Standard";
break;
case kPAWSettingsTableViewMaptypeSectionSatelliteRow:
cellText = @"Satellite";
break;
case kPAWSettingsTableViewMaptypeSectionHybridRow:
cellText = @"Hybrid";
break;
case kPAWSettingsTableViewMaptypeNumberOfRows: // never reached.
default:
cellText = @"?";
break;
}
return cellText;
}
- (PAWMaptypeSelect)maptypeForCell:(NSIndexPath *)indexPath {
PAWMaptypeSelect maptype = nil;
switch (indexPath.row) {
case kPAWSettingsTableViewMaptypeSectionStandardRow:
maptype = @"Standard";
break;
case kPAWSettingsTableViewMaptypeSectionSatelliteRow:
maptype = @"Satellite";
break;
case kPAWSettingsTableViewMaptypeSectionHybridRow:
maptype = @"Hybrid";
break;
case kPAWSettingsTableViewMaptypeNumberOfRows: // never reached.
default:
maptype = nil;
break;
}
return maptype;
}
#pragma mark - UINavigationBar-based actions
- (IBAction)done:(id)sender {
[self.presentingViewController dismissModalViewControllerAnimated:YES];
}
#pragma mark - UITableViewDataSource methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return kPAWSettingsTableViewNumberOfSections;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
switch ((kPAWSettingsTableViewSections)section) {
case kPAWSettingsTableViewDistance:
return kPAWSettingsTableViewDistanceNumberOfRows;
break;
case kPAWSettingsTableViewMaptype:
return kPAWSettingsTableViewMaptypeNumberOfRows;
break;
case kPAWSettingsTableViewNumberOfSections:
return 2;
break;
};
}
- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifier = @"SettingsTableView";
if (indexPath.section == kPAWSettingsTableViewDistance) {
UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier];
if ( cell == nil )
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier];
}
// Configure the cell.
cell.textLabel.text = [self distanceLabelForCell:indexPath];
if (self.filterDistance == 0.0) {
NSLog(@"We have a zero filter distance!");
}
PAWLocationAccuracy filterDistanceInFeet = self.filterDistance * ( 1 / kPAWFeetToMeters);
PAWLocationAccuracy distanceForCell = [self distanceForCell:indexPath];
if (abs(distanceForCell - filterDistanceInFeet) < 0.001 ) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
else if (indexPath.section == kPAWSettingsTableViewMaptype){
UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier];
if ( cell == nil )
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier];
}
// Configure the cell.
cell.textLabel.text = [self maptypeLabelForCell:indexPath];
return cell;
}
else {
return nil;
}
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
switch ((kPAWSettingsTableViewSections)section) {
case kPAWSettingsTableViewDistance:
return @"Search Distance";
break;
case kPAWSettingsTableViewMaptype:
return @"Map Type";
break;
case kPAWSettingsTableViewNumberOfSections:
return @"";
break;
}
}
#pragma mark - UITableViewDelegate methods
// Called after the user changes the selection.
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.section == kPAWSettingsTableViewDistance) {
[aTableView deselectRowAtIndexPath:indexPath animated:YES];
// if we were already selected, bail and save some work.
UITableViewCell *selectedCell = [aTableView cellForRowAtIndexPath:indexPath];
if (selectedCell.accessoryType == UITableViewCellAccessoryCheckmark) {
return;
}
// uncheck all visible cells.
for (UITableViewCell *cell in [aTableView visibleCells]) {
if (cell.accessoryType != UITableViewCellAccessoryNone) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
selectedCell.accessoryType = UITableViewCellAccessoryCheckmark;
PAWLocationAccuracy distanceForCellInFeet = [self distanceForCell:indexPath];
self.filterDistance = distanceForCellInFeet * kPAWFeetToMeters;
}
else if (indexPath.section == kPAWSettingsTableViewMaptype){
[aTableView deselectRowAtIndexPath:indexPath animated:YES];
// if we were already selected, bail and save some work.
UITableViewCell *selectedCell = [aTableView cellForRowAtIndexPath:indexPath];
if (selectedCell.accessoryType == UITableViewCellAccessoryCheckmark) {
return;
}
// uncheck all visible cells.
for (UITableViewCell *cell in [aTableView visibleCells]) {
if (cell.accessoryType != UITableViewCellAccessoryNone) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
selectedCell.accessoryType = UITableViewCellAccessoryCheckmark;
PAWMaptypeSelect maptypeForCell = [self maptypeForCell:indexPath];
}
}
@end
答案 0 :(得分:1)
你有这个错误
//取消选中所有可见的单元格。
for (UITableViewCell *cell in [aTableView visibleCells]) {
if (cell.accessoryType != UITableViewCellAccessoryNone) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
这里for循环取消选择所有单元格。你还要检查if loop中的部分
你可以像这样为你的单元格设置标签
cell.tag = indexPath.section;
并且在for循环中,如果条件是
for (UITableViewCell *cell in [aTableView visibleCells]) {
if (cell.accessoryType != UITableViewCellAccessoryNone && cell.tag == indexPath.section) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
答案 1 :(得分:0)
- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifier = @"SettingsTableView";
if (indexPath.section == kPAWSettingsTableViewDistance) {
UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier];
if ( cell == nil )
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier];
}
// Configure the cell.
cell.textLabel.text = [self distanceLabelForCell:indexPath];
if (self.filterDistance == 0.0) {
NSLog(@"We have a zero filter distance!");
}
PAWLocationAccuracy filterDistanceInFeet = self.filterDistance * ( 1 / kPAWFeetToMeters);
PAWLocationAccuracy distanceForCell = [self distanceForCell:indexPath];
if (abs(distanceForCell - filterDistanceInFeet) < 0.001 ) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
else if (indexPath.section == kPAWSettingsTableViewMaptype){
UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier];
if ( cell == nil )
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier];
}
// Configure the cell.
cell.textLabel.text = [self maptypeLabelForCell:indexPath];
PAWLocationAccuracy filterDistanceInFeet = self.filterDistance * ( 1 / kPAWFeetToMeters);
PAWLocationAccuracy distanceForCell = [self distanceForCell:indexPath];
if (abs(distanceForCell - filterDistanceInFeet) < 0.001 ) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
else {
return nil;
}
}
答案 2 :(得分:0)
目前我发现了以下错误
break
声明return
case kPAWSettingsTableViewNumberOfSections:
中,您应该返回kPAWSettingsTableViewNumberOfSections
前两个缺陷导致许多样板代码。我认为您应该为每个被选为NSIndexPath
的部分存储@property
。您可以在tableView:didSelectRowAtIndexPath:
:
selectedIndexPath
。selectedIndexPath
改为新的。然后您必须在tableView:cellForRowAtIndexPath:
中添加以下代码:
if (indexPath.row == self.selectedIndexPath.row && indexPath.section == self.selectedIndexPath.section) {
// Change to checkmark.
} else {
// Change to not checked.
}
我在自己的项目中检查单元格的方式非常相似。我希望下面的代码也能帮助您了解我解决问题的方法:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (/*condition*/) {
[...]
}
else if (/*checkmark section*/) {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CheckmarkCellId forIndexPath:indexPath];
cell.textLabel.text = [self labelForRow:indexPath.row];
cell.accessoryType = (indexPath.row == [self defaultAgglomerationIndex]) ? UITableViewCellAccessoryCheckmark : UITableViewCellAccessoryNone;
cell.imageView.image = (indexPath.row == [self selectedAgglomerationIndex]) ? [UIImage imageNamed:@"icoMap"] : [UIImage imageNamed:@"region"];
return cell;
}
else if (/*Another condition */) {
[...]
}
return nil;
}
tableView:didSelectRowAtIndexPath:
中的基本代码(我重新加载整个部分)
self.selectedIndex = indexPath;
NSIndexSet *set = [NSIndexSet indexSetWithIndex:indexPath.section];
[self.tableView reloadSections:set withRowAnimation:UITableViewRowAnimationNone];
答案 3 :(得分:0)
试试这个,对我来说工作得很好:
- 变量:
@property NSInteger checkedCellRow;
@property NSInteger checkedCellSection;
-functions:
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
if (checkedCellSection == indexPath.section)
{
if (checkedCellRow == indexPath.row)
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
checkedCellRow = indexPath.row;
checkedCellSection = indexPath.section;
[myTable reloadData];
}