ios成长之每日一遍(day 8)

这几天都有一些任务要跟, 把ios的学习拉后, 看看要抓紧咯, 看看轮到的学习的是UITableView。

BIDAppDelegate.h

#import <UIKit/UIKit.h>

@class BIDViewController;

@interface BIDAppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@property (strong, nonatomic) BIDViewController *viewController;

@end

BIDAppDelegate.m

#import "BIDAppDelegate.h"

#import "BIDViewController.h"

@implementation BIDAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[BIDViewController alloc] initWithNibName:@"BIDViewController" bundle:nil];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

@end

BIDViewController.h

#import <UIKit/UIKit.h>

@interface BIDViewController : UIViewController
<UITableViewDataSource, UITableViewDelegate>

@property (copy, nonatomic) NSArray *dwarves;

@end

BIDViewController.m

#import "BIDViewController.h"

@interface BIDViewController ()

@end

@implementation BIDViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.dwarves = @[@"Sleepy", @"Sneezy",
    @"Bashful", @"Happy", @"Doc", @"Grumpy", @"Dopey", @"Thorin",
    @"Dorin", @"Nori", @"Ori", @"Balin", @"Dwalin", @"Fili", @"Kili",
    @"Oin", @"Gloin", @"Bifur", @"Bofur", @"Bombur"];
}

#pragma mark -
#pragma mark Table View Data Source Methods
- (NSInteger)tableView:(UITableView *)tableView
 numberOfRowsInSection:(NSInteger)section
{
    return [self.dwarves count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath     // 创建默认的UITableViewCell
{    
    static NSString *SimpleTableIdentifier = @"SimpleTableIdentifier";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
                             SimpleTableIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc]
                initWithStyle:UITableViewCellStyleDefault
                reuseIdentifier:SimpleTableIdentifier];
    }

    UIImage *image = [UIImage imageNamed:@"star.png"];
    cell.imageView.image = image;

    cell.textLabel.text = self.dwarves[indexPath.row];
    cell.textLabel.font = [UIFont boldSystemFontOfSize:50];
    
    if (indexPath.row < 7) {
        cell.detailTextLabel.text = @"Mr. Disney";
    } else {
        cell.detailTextLabel.text = @"Mr. Tolkien";
    }
    return cell;
}

#pragma mark -
#pragma mark Table Delegate Methods

- (NSInteger)tableView:(UITableView *)tableView
indentationLevelForRowAtIndexPath:(NSIndexPath *)indexPath  // 类似expandListview
{
    return indexPath.row;
}

- (NSIndexPath *)tableView:(UITableView *)tableView
  willSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row <= 3) {   // 前4行点击没有反应
        return nil;
    } else {
        return indexPath;
    }
}

- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{    
    NSString *rowValue = self.dwarves[indexPath.row];
    NSString *message = [[NSString alloc] initWithFormat:
                         @"You selected %@", rowValue];
    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Row Selected!"
                          message:message
                          delegate:nil
                          cancelButtonTitle:@"Yes I Did"
                          otherButtonTitles:nil];
    [alert show];
    
    [tableView deselectRowAtIndexPath:indexPath animated:YES];  // 取消选择
}

- (CGFloat)tableView:(UITableView *)tableView
heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 70;
}

@end

有section的tableview

#import "BIDViewController.h"

static NSString *SectionsTableIdentifier = @"SectionsTableIdentifier";

@implementation BIDViewController {
    NSMutableArray *filteredNames;
    UISearchDisplayController *searchController;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    UITableView *tableView = (id)[self.view viewWithTag:1];
    [tableView registerClass:[UITableViewCell class]
      forCellReuseIdentifier:SectionsTableIdentifier];  // 生成或创建tableviewcell
    
    filteredNames = [NSMutableArray array];
    UISearchBar *searchBar = [[UISearchBar alloc]
                              initWithFrame:CGRectMake(0, 0, 320, 44)];
    tableView.tableHeaderView = searchBar;  // 向tableview的header添加view
    searchController = [[UISearchDisplayController alloc]
                        initWithSearchBar:searchBar
                        contentsController:self];   // serachbar需要controller作控制
    searchController.delegate = self;   // 需要实现UISearchDisplayDelegate
    searchController.searchResultsDataSource = self;    // 搜索数据源
    
    NSString *path = [[NSBundle mainBundle] pathForResource:@"sortednames"
                                                     ofType:@"plist"];
    self.names = [NSDictionary dictionaryWithContentsOfFile:path];
    
    self.keys = [[self.names allKeys] sortedArrayUsingSelector:
                 @selector(compare:)];
}

#pragma mark -
#pragma mark Table View Data Source Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    if (tableView.tag == 1) {
        return [self.keys count];
    } else {
        return 1;
    }
}

- (NSInteger)tableView:(UITableView *)tableView
 numberOfRowsInSection:(NSInteger)section
{
    if (tableView.tag == 1) {
        NSString *key = self.keys[section];
        NSArray *nameSection = self.names[key];
        return [nameSection count];
    } else {
        return [filteredNames count];
    }
}

- (NSString *)tableView:(UITableView *)tableView
titleForHeaderInSection:(NSInteger)section
{
    if (tableView.tag == 1) {
        return self.keys[section];
    } else {
        return nil;
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
                             SectionsTableIdentifier];
    if (tableView.tag == 1) {
        NSString *key = self.keys[indexPath.section];   // 返回行数对应的section
        NSArray *nameSection = self.names[key];
        
        cell.textLabel.text = nameSection[indexPath.row];
    } else {
        cell.textLabel.text = filteredNames[indexPath.row];
    }
    return cell;
}

// 指定tableview section的标题
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
    if (tableView.tag == 1) {
        return self.keys;
    } else {
        return nil;
    }
}

#pragma mark - 
#pragma mark Search Display Delegate Methods
// 告诉UISearchDisplayDelegate，控制器已经加载tableview
- (void)searchDisplayController:(UISearchDisplayController *)controller
  didLoadSearchResultsTableView:(UITableView *)tableView
{
    [tableView registerClass:[UITableViewCell class]
      forCellReuseIdentifier:SectionsTableIdentifier];
}

// 请求UISearchDisplayDelegate是否应该根据搜索字重载
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
    [filteredNames removeAllObjects];
    if (searchString.length > 0) {
        // NSPredicate 指定数据被获取或者过滤的方式
        NSPredicate *predicate =
        [NSPredicate
         predicateWithBlock:^BOOL(NSString *name, NSDictionary *b) {
            NSRange range = [name rangeOfString:searchString
                                        options:NSCaseInsensitiveSearch];
            return range.location != NSNotFound;
        }];
        for (NSString *key in self.keys) {
            NSArray *matches = [self.names[key]
                                filteredArrayUsingPredicate: predicate];// 过滤
            [filteredNames addObjectsFromArray:matches];
        }
    }
    return YES;
}

@end