有什么好的教程或方法可以将文本字段变成搜索栏吗?
我已经用搜索栏 + 搜索显示 Controller 设置了我的搜索栏,它工作正常——但很难定制……特别是摆脱难看的灰色覆盖,显然这是最好的方法。
我一直没能找到任何关于执行此操作的信息,并且认为之前必须有人这样做过。
最佳答案
我不知道有任何教程涵盖该主题,但前段时间在其他人的帮助下我能够完成该主题。这是 .h 和 .m 文件中的全部代码。我可以解释整个事情,但它在每一行都有评论,所以我想它已经足够清楚了。
.h
#import <UIKit/UIKit.h>
@interface SEMainVC : UIViewController <UITextFieldDelegate>{
NSMutableArray *dummyArray;
NSMutableArray *searchArray;
NSString *searchTextString;
}
@property (weak, nonatomic) IBOutlet UITextField *searchTextField;
@property (weak, nonatomic) IBOutlet UITableView *contentTableView;
- (void) setupData;
@end
.m
@interface SEMainVC ()
@end
@implementation SEMainVC
- (void)viewDidLoad
{
[super viewDidLoad];
//set the selector to the text field in order to change its value when edited
[self.searchTextField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
//here you set up the methods to search array and reloading the tableview
[self setupData];
[self updateSearchArray];
[self.contentTableView reloadData];
}
//setting up the data sourch for the mutable array
- (void) setupData {
dummyArray = [[NSMutableArray alloc] init];
[dummyArray addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"dummy 1", @"name" , @"image1.JPG", @"image" , @"dummy 1 description textview", @"description", nil]];
[dummyArray addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"dummy 2", @"name" , @"image1.JPG", @"image" , @"dummy 2 description textview", @"description", nil]];
[dummyArray addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"dummy 3", @"name" , @"image1.JPG", @"image" , @"dummy 3 description textview", @"description", nil]];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [searchArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if( cell == nil ){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
cell.textLabel.text = [[searchArray objectAtIndex:indexPath.row] objectForKey:@"name"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:@"DummyDetail" sender:[NSNumber numberWithInt:indexPath.row]];
}
#pragma mark - Search Methods
-(void)textFieldDidChange:(UITextField*)textField
{
searchTextString = textField.text;
[self updateSearchArray];
}
//update seach method where the textfield acts as seach bar
-(void)updateSearchArray
{
if (searchTextString.length != 0) {
searchArray = [NSMutableArray array];
for ( NSDictionary* item in dummyArray ) {
if ([[[item objectForKey:@"name"] lowercaseString] rangeOfString:[searchTextString lowercaseString]].location != NSNotFound) {
[searchArray addObject:item];
}
}
} else {
searchArray = dummyArray;
}
[self.contentTableView reloadData];
}
#pragma mark - Table view delegate
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(NSNumber*)indexNumber
{
if([[segue identifier] isEqualToString:@"DummyDetail"]){
NSInteger index = [indexNumber integerValue];
SEDetailVC *dummyDetail = [segue destinationViewController];
dummyDetail.dummyImageString = [[searchArray objectAtIndex:index] objectForKey:@"image"];
dummyDetail.dummyTextString = [[searchArray objectAtIndex:index] objectForKey:@"description"];
dummyDetail.title = [[searchArray objectAtIndex:index] objectForKey:@"name"];
}
}
- (void)viewDidUnload {
[self setSearchTextField:nil];
[self setContentTableView:nil];
[super viewDidUnload];
}
@end
我希望以上内容足够清楚和有用,如果您需要任何帮助,请告诉我。
关于ios - 文本字段作为搜索栏,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22437828/