【发布时间】：2013-05-21 21:25:48
【问题描述】：
所以我开发了一个应用程序，该应用程序当前具有填充的 UITableView。 UITableView 当前填充了来自 MySQL 数据库的数据。 UITableView 还包含一个工作搜索栏。
不过，除此之外，我们现在想要添加一个 3 列的 UIPickerView 到组合中（已经编码）。
想法：用户选择 3 个值（每列一个），然后点击“开始”按钮。一旦他们选择了他们的值并按下 GO，我们希望应用程序通过 uitableview 过滤，并且只显示包含他们在 PickerView 中选择的值的结果。
一切都是编码的，我只是不确定如何将两者联系起来。我该怎么做呢？到目前为止，我已将我们的代码粘贴在下面（对于冗长的帖子表示歉意，但在这种情况下似乎都是有效的）。非常感谢任何帮助。
ViewController.h（表视图控制器）
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController {
IBOutlet UITableView *strainTableView;
NSArray *Strains;
NSArray *searchResults;
NSMutableData *data;
}
@property (nonatomic, retain) NSArray *searchResults;
@end
ViewController.m（表视图控制器）
- (int)numberOfSectionsInTableView: (UITableView *)tableview
{
return 1;
}
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView) {
return [searchResults count];
} else {
return [Strains count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *strainTableIdentifier = @"StrainTableCell";
StrainTableCell *cell = (StrainTableCell *)[tableView dequeueReusableCellWithIdentifier:strainTableIdentifier];
if (cell == nil)
cell = [[StrainTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:strainTableIdentifier];
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"StrainTableCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
if (tableView == self.searchDisplayController.searchResultsTableView) {
cell.titleLabel.text = [[searchResults objectAtIndex:indexPath.row] objectForKey:@"Title"];
cell.descriptionLabel.text = [[searchResults objectAtIndex:indexPath.row] objectForKey:@"Description"];
cell.ratingLabel.text = [[searchResults objectAtIndex:indexPath.row] objectForKey:@"Rating"];
NSLog(@"%@", searchResults);
} else {
cell.titleLabel.text = [[Strains objectAtIndex:indexPath.row] objectForKey:@"Title"];
cell.descriptionLabel.text = [[Strains objectAtIndex:indexPath.row] objectForKey:@"Description"];
cell.ratingLabel.text = [[Strains objectAtIndex:indexPath.row] objectForKey:@"Rating"];
}
{
}
return cell;
}
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:@"SELF contains[cd] %@",
searchText];
searchResults = [Strains filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
objectAtIndex:[self.searchDisplayController.searchBar
selectedScopeButtonIndex]]];
return YES;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
StrainDetailViewController *detailViewController = [[StrainDetailViewController alloc] initWithNibName:@"StrainDetailViewController" bundle:nil]; if ([searchResults count]) {
detailViewController.title = [[searchResults objectAtIndex:indexPath.row] objectForKey:@"Title"];
detailViewController.strainDetail = [searchResults objectAtIndex:indexPath.row];
} else {
detailViewController.title = [[Strains objectAtIndex:indexPath.row] objectForKey:@"Title"];
detailViewController.strainDetail = [Strains objectAtIndex:indexPath.row];
NSLog(@"%@", Strains);
}
[self.navigationController pushViewController:detailViewController animated:YES];
}
PickerViewController.h
@interface PickerViewController : UIViewController {
UIPickerView *pickerView;
NSMutableArray *array1;
NSMutableArray *array2;
NSMutableArray *array3;
NSArray *Strains;
NSArray *searchResults;
NSMutableData *data;
}
- (IBAction)buttonpressed:(UIButton *)sender;
@property (nonatomic, retain) IBOutlet UIPickerView *pickerView;
- (void)populateArray1;
- (void)populateArray2;
- (void)populateArray3;
@end
**PickerViewController.m**
#pragma mark -
#pragma mark picker view methods
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
return 3;
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (component == 0)
{
NSLog(@"you selected %@", [array1 objectAtIndex:row]);
}
if (component == 1)
{
NSLog(@"you selected %@", [array2 objectAtIndex:row]);
}
if (component == 2)
{
NSLog(@"you selected %@", [array3 objectAtIndex:row]);
}
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
{
if (component == 0)
{
return [array1 count];
}
if (component == 1)
{
return [array2 count];
}
if (component == 2)
{
return [array3 count];
}
else
{
return [array1 count];
}
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
{
if (component == 0)
{
return [array1 objectAtIndex:row];
}
if (component == 1)
{
return [array2 objectAtIndex:row];
}
if (component == 2)
{
return [array3 objectAtIndex:row];
}
else
{
return [array2 objectAtIndex:row];
}
}
- (void)populateArray1
{
array1 = [[NSMutableArray alloc] init];
[array1 addObject:@"Arthritis"];
[array1 addObject:@"Cancer"];
[array1 addObject:@"HIV"];
[array1 addObject:@"Migraines"];
[array1 addObject:@"Insomnia"];
}
- (void)populateArray2
{
array2 = [[NSMutableArray alloc] init];
[array2 addObject:@"Nausea"];
[array2 addObject:@"Pain"];
[array2 addObject:@"Appetite"];
[array2 addObject:@"Fever"];
[array2 addObject:@"Exhaustion"];
}
- (void)populateArray3
{
array3 = [[NSMutableArray alloc] init];
[array3 addObject:@"Oil"];
[array3 addObject:@"Plant"];
[array3 addObject:@"Edible"];
[array3 addObject:@"Powder"];
}
- (IBAction)buttonpressed:(UIButton *)sender {
NSLog(@"Button Pushed!");
NSPredicate *TitlePredicate = [NSPredicate predicateWithFormat:@"Title contains[cd] %@", [pickerView selectedRowInComponent:0]];
NSPredicate *descriptionPredicate = [NSPredicate predicateWithFormat:@"Description contains[cd] %@", [pickerView selectedRowInComponent:1]];
NSPredicate *ratingpredicate = [NSPredicate predicateWithFormat:@"Rating contains[cd] %@", [pickerView selectedRowInComponent:2]];
NSCompoundPredicate *resultPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects: TitlePredicate,descriptionPredicate,ratingpredicate, nil]];
filterResults = [Strains filteredArrayUsingPredicate:resultPredicate];
}
@end
【问题讨论】：
标签： objective-c uitableview view xcode4.5 uipickerview