镇楼专用图
代码简单易懂，属于自己练手的代码，还在学习，写的不好，希望勿喷
1、头文件
#import <UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN
typedef NS_ENUM(NSInteger, WDComboBoxControlDirection) {
WDComboBoxControlDirectionTop,
WDComboBoxControlDirectionLeading,
WDComboBoxControlDirectionTrailing,
WDComboBoxControlDirectionBottom,
};
@protocol WDComboBoxControlDataSource <NSObject>
@optional
/** < 数据数组 > */
- (NSArray<NSArray<NSString *> *> *)dataSourceOfColunm;
@required
/** < 标题数组 > */
- (NSArray<NSString *> *)titleOfSection;
@end
@protocol WDComboBoxControlDelegate <NSObject>
/**
点击事件
@param indexPath indexPath description
@param title title description
@param sourceView sourceView description
*/
- (void)selectedAtIndexPath:(NSIndexPath *)indexPath resultTitle:(NSString *)title fromSourceView:(UIView *)sourceView;
@end
@interface WDComboBoxControl : UIView
@property (nonatomic, weak) id <WDComboBoxControlDataSource> dataSource;
@property (nonatomic, weak) id <WDComboBoxControlDelegate> delegate;
/** < 背景按钮，可以定义需要的属性 > */
@property (nonatomic, strong) UIButton *backgroundButton;
/** < 内容TableView，也可以定义一些属性 > */
@property (nonatomic, strong) UITableView *tableView;
/**
初始化方法
@param height 显示内容高度
@param view 参考View
@return return value description
*/
- (instancetype)initViewWithMaxHeight:(CGFloat)height fromView:(UIView *)view showDirection:(WDComboBoxControlDirection)direction;
/**
显示页面
*/
- (void)showInView;
@end
NS_ASSUME_NONNULL_END
2、实现文件
#import "WDComboBoxControl.h"
@interface WDComboBoxControl () <UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, assign) CGFloat viewHeight;
@property (nonatomic, strong) NSArray<NSArray<NSString *> *> * dataArray;
@property (nonatomic, strong) NSArray<NSString *> * titleArray;
@property (nonatomic, strong) UIView *sourceView;
@property (nonatomic, assign) WDComboBoxControlDirection direction;
@end
@implementation WDComboBoxControl
#pragma mark =============== 初始化页面 ===============
- (instancetype)initViewWithMaxHeight:(CGFloat)height fromView:(UIView *)view showDirection:(WDComboBoxControlDirection)direction {
self = [super init];
if (self) {
_viewHeight = height;
_sourceView = view;
_direction = direction;
[self setupSubViewsPropertys];
[self setupSubViewsConstraints];
}
return self;
}
#pragma mark =============== 显示页面 ===============
- (void)showInView {
self.frame = UIScreen.mainScreen.bounds;
[UIApplication.sharedApplication.delegate.window addSubview:self];
}
#pragma mark =============== 让页面消失 ===============
- (void)dismisssView {
[self removeFromSuperview];
}
#pragma mark =============== 获取数据源 ===============
- (void)setDataSource:(id<WDComboBoxControlDataSource>)dataSource {
_dataSource = dataSource;
if (self.dataSource && [self.dataSource respondsToSelector:@selector(dataSourceOfColunm)]) {
self.dataArray = [self.dataSource dataSourceOfColunm];
}
if (self.dataArray && [self.dataSource respondsToSelector:@selector(titleOfSection)]) {
self.titleArray = [self.dataSource titleOfSection];
}
[self.tableView reloadData];
}
#pragma mark =============== Add controls, set properties ===============
- (void)setupSubViewsPropertys {
self.backgroundButton = [[UIButton alloc] init];
self.backgroundButton.backgroundColor = UIColor.clearColor;
[self.backgroundButton addTarget:self action:@selector(dismisssView) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:self.backgroundButton];
self.tableView = [[UITableView alloc] init];
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.tableView.tableFooterView = [[UIView alloc] init];
self.tableView.layer.borderColor = UIColor.lightGrayColor.CGColor;
self.tableView.layer.borderWidth = 0.5;
self.tableView.estimatedRowHeight = 45;
self.tableView.layer.cornerRadius = 5;
self.tableView.rowHeight = UITableViewAutomaticDimension;
[self addSubview:self.tableView];
}
#pragma mark =============== Setting control layout constraints ===============
- (void)setupSubViewsConstraints {
self.backgroundButton.frame = UIScreen.mainScreen.bounds;
switch (self.direction) {
case WDComboBoxControlDirectionBottom:{
self.tableView.frame = CGRectMake(CGRectGetMinX(self.sourceView.frame),
CGRectGetMaxY(self.sourceView.frame),
self.sourceView.frame.size.width,
self.viewHeight);
}
break;
case WDComboBoxControlDirectionTop:{
self.tableView.frame = CGRectMake(CGRectGetMinX(self.sourceView.frame),
CGRectGetMaxY(self.sourceView.frame) - self.viewHeight - self.sourceView.frame.size.height,
self.sourceView.frame.size.width,
self.viewHeight);
}
break;
case WDComboBoxControlDirectionLeading:{
self.tableView.frame = CGRectMake(CGRectGetMinX(self.sourceView.frame) - self.sourceView.frame.size.width,
CGRectGetMinY(self.sourceView.frame),
self.sourceView.frame.size.width,
self.viewHeight);
}
break;
case WDComboBoxControlDirectionTrailing:{
self.tableView.frame = CGRectMake(CGRectGetMinX(self.sourceView.frame) + self.sourceView.frame.size.width,
CGRectGetMinY(self.sourceView.frame),
self.sourceView.frame.size.width,
self.viewHeight);
}
break;
default:
break;
}
}
#pragma mark =============== UITableViewDelegate, UITableViewDataSource ===============
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return self.titleArray[section];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return self.dataArray.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.dataArray[section] count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];
}
cell.textLabel.text = self.dataArray[indexPath.section][indexPath.row];
cell.textLabel.numberOfLines = 0;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (self.delegate && [self.delegate respondsToSelector:@selector(selectedAtIndexPath:resultTitle: fromSourceView:)]) {
[self.delegate selectedAtIndexPath:indexPath resultTitle:self.dataArray[indexPath.section][indexPath.row] fromSourceView:self.sourceView];
[self dismisssView];
}
}
@end
3、使用方法
// 1、导入头文件
#import "WDComboBoxControl.h"
// 2、遵循代理和数据源
<WDComboBoxControlDataSource, WDComboBoxControlDelegate>
// 3、实现方法
#pragma mark =============== WDComBoxControlDataSource ===============
- (NSArray<NSString *> *)titleOfSection;
- (NSArray<NSArray<NSString *> *> *)dataSourceOfColunm;
#pragma mark =============== WDComBoxControlDelegate ===============
- (void)selectedAtIndexPath:(NSIndexPath *)indexPath resultTitle:(NSString *)title fromSourceView:(UIView *)sourceView;
// 下面是实例：
@property (nonatomic, strong) UIButton *button;
@property (nonatomic, strong) UIButton *button2;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
UIButton *button = [[UIButton alloc] init];
[button setTitleColor:UIColor.blackColor forState:UIControlStateNormal];
[button addTarget:self action:@selector(buttonShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
button.layer.borderColor = UIColor.lightGrayColor.CGColor;
button.layer.borderWidth = 0.5;
[button setTitle:@"按钮" forState:UIControlStateNormal];
[button mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerX.mas_equalTo(self.view);
make.top.mas_equalTo(self.wdNavigationBar.mas_bottom);
make.width.mas_equalTo(300);
}];
self.button = button;
UIButton *button2 = [[UIButton alloc] init];
[button2 setTitleColor:UIColor.blackColor forState:UIControlStateNormal];
[button2 addTarget:self action:@selector(buttonShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];
button2.layer.borderColor = UIColor.lightGrayColor.CGColor;
button2.layer.borderWidth = 0.5;
[button2 setTitle:@"按钮2" forState:UIControlStateNormal];
button2.bounds = CGRectMake(0, 0, 300, 50);
button2.center = self.view.center;
self.button2 = button2;
}
- (void)buttonShow:(UIButton *)sender {
WDComboBoxControl *view = [[WDComboBoxControl alloc] initViewWithMaxHeight:400 fromView:sender showDirection:WDComboBoxControlDirectionBottom];
view.dataSource = self;
view.delegate = self;
view.backgroundButton.backgroundColor = [UIColor colorWithWhite:0 alpha:0.3];
[view showInView];
}
#pragma mark =============== WDComBoxControlDataSource ===============
- (NSArray<NSString *> *)titleOfSection {
return @[@"安徽省", @"浙江省", @"江苏省", @"安徽省", @"浙江省", @"江苏省"];
}
- (NSArray<NSArray<NSString *> *> *)dataSourceOfColunm {
return @[@[@"合肥", @"芜湖", @"安庆"],
@[@"南京", @"苏州", @"无锡"],
@[@"杭州", @"宁波", @"温州"],
@[@"合肥", @"芜湖", @"安庆"],
@[@"南京", @"苏州", @"无锡"],
@[@"杭州", @"宁波", @"温州"]];
}
#pragma mark =============== WDComBoxControlDelegate ===============
- (void)selectedAtIndexPath:(NSIndexPath *)indexPath resultTitle:(NSString *)title fromSourceView:(UIView *)sourceView {
UIButton *sender = (UIButton *)sourceView;
[sender setTitle:title forState:UIControlStateNormal];
}
4、效果图
效果图
5、Demo地址（代码都在这里了，就不弄个Demo了，这个可以自定义的地方还有很多，TableView和背景的Button都可以，随心所欲吧！）
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