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iOS下拉选择菜单简单封装

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 25 4
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这篇CFSDN的博客文章iOS下拉选择菜单简单封装由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

本文实例为大家分享了简单封装的iOS下拉选择菜单代码，供大家参考，具体内容如下 。

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//
// OrderListDownMenu.h
 
#import <UIKit/UIKit.h>
 
@protocol OrderListDownMenuDelegate <NSObject>
 
- ( void )OrderListDownMenu:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
 
@end
 
typedef void (^Dismiss)( void );
 
@interface OrderListDownMenu : UIView<UITableViewDataSource, UITableViewDelegate>
 
@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, assign) id<OrderListDownMenuDelegate> delegate;
@property (nonatomic, strong) NSArray *arrData;
@property (nonatomic, strong) NSArray *arrImgName;
@property (nonatomic, copy) Dismiss dismiss;
 
- (instancetype)initWithDataArr:(NSArray *)dataArr origin:(CGPoint)origin width:(CGFloat)width rowHeight:(CGFloat)rowHeight;
 
- ( void )dismissWithCompletion:( void (^)(OrderListDownMenu *object))completion;
 
@end
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#import "OrderListDownMenu.h"
 
#define TopToView 63.0f
#define rightToView kScreenWidth - 15.0f
#define LeftToView kScreenWidth - 145.0 - 10.0f
#define CellLineEdgeInsets UIEdgeInsetsMake(0, -80, 0, 0)
#define kScreenWidth    [UIScreen mainScreen].bounds.size.width
#define kScreenHeight    [UIScreen mainScreen].bounds.size.height
 
@interface OrderListDownMenu()
 
@property (nonatomic, assign) CGPoint origin;
@property (nonatomic, assign) CGFloat rowHeight;
 
@end
 
@implementation OrderListDownMenu
 
- (instancetype)initWithDataArr:(NSArray *)dataArr origin:(CGPoint)origin width:(CGFloat)width rowHeight:(CGFloat)rowHeight {
   
   self = [super initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight)];
   if (self) {
     if (rowHeight <= 0) {
       rowHeight = 50;
     }
     
     // 设置背景颜色
     self.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.2];
     self.origin = origin;
     self.rowHeight = rowHeight;
     self.arrData = [dataArr copy];
     self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(origin.x + LeftToView, origin.y + TopToView, width, rowHeight * dataArr.count) style:UITableViewStylePlain];
     _tableView.dataSource = self;
     _tableView.delegate = self;
     [self addSubview:_tableView];
     
     _tableView.backgroundColor = [UIColor whiteColor];
     _tableView.layer.cornerRadius = 2;
     _tableView.bounces = NO;
     _tableView.layer.cornerRadius = 8;
     _tableView.separatorColor = [UIColor colorWithWhite:0.3 alpha:1];
    
     _tableView.separatorStyle = UITableViewCellSelectionStyleNone;
     [_tableView registerClass:[UITableViewCell class ] forCellReuseIdentifier:@ "cell" ];
     
     if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
       [self.tableView setSeparatorInset:CellLineEdgeInsets];
     }
     
     if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
       [self.tableView setLayoutMargins:CellLineEdgeInsets];
     }
   }
   return self;
}
 
- ( void )layoutSubviews {
   [super layoutSubviews];
}
 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
   return self.arrData.count;
}
 
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
   return self.rowHeight;
}
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
   
   UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@ "cell" ];
   cell.textLabel.textColor = THEME_COLOR_GRAY_1;
   cell.textLabel.font = [UIFont systemFontOfSize:15];
   cell.textLabel.text = self.arrData[indexPath.row];
   
   if (self.arrImgName.count > indexPath.row) {
     cell.imageView.image = [UIImage imageNamed:self.arrImgName[indexPath.row]];
     cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
   }
   
   UILabel *label = [[UILabel alloc] init];
   label.frame = CGRectMake(0, 49, _tableView.frame.size.width, 0.5);
   label.backgroundColor = THEME_SEPARATOR_COLOR;
   [cell.contentView addSubview:label];
   
   return cell;
}
 
- ( void )tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
   
   if ([self.delegate respondsToSelector:@selector(OrderListDownMenu:didSelectRowAtIndexPath:)]){
     [self.delegate OrderListDownMenu:tableView didSelectRowAtIndexPath:indexPath];
   }
   
   [tableView deselectRowAtIndexPath:indexPath animated:YES];
   [self dismissWithCompletion:nil];
}
 
- ( void )dismissWithCompletion:( void (^)(OrderListDownMenu *object))completion {
   
   __weak __typeof(self) weakSelf = self;
   [UIView animateWithDuration:0.2 animations:^{
     weakSelf.alpha = 0;
     weakSelf.tableView.frame = CGRectMake(weakSelf.origin.x + LeftToView + 145, weakSelf.origin.y + TopToView, 0, 0);
   } completion:^( BOOL finished) {
     [weakSelf removeFromSuperview];
     if (completion) {
       completion(weakSelf);
     }
     if (weakSelf.dismiss) {
       weakSelf.dismiss();
     }
   }];
}
 
- ( void )touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
   
   UITouch *touch = [touches anyObject];
   if (![touch.view isEqual:self.tableView]) {
     [self dismissWithCompletion:nil];
   }
}
 
- ( void )drawRect:(CGRect)rect {
   
   //[colors[serie] setFill];
   
   //拿到当前视图准备好的画板
   
   CGContextRef context = UIGraphicsGetCurrentContext();
   
   //利用path进行绘制三角形
   
   CGContextBeginPath(context); //标记
   
   CGContextMoveToPoint(context,
              rightToView - 13, 53); //设置起点
   
   CGContextAddLineToPoint(context,
               rightToView - 21, TopToView);
   
   CGContextAddLineToPoint(context,
               rightToView - 4, TopToView);
   
   CGContextClosePath(context); //路径结束标志，不写默认封闭
   
 
   [self.tableView.backgroundColor setFill]; //设置填充色
   
   [self.tableView.backgroundColor setStroke]; //设置边框颜色
   
   CGContextDrawPath(context,
            kCGPathFillStroke); //绘制路径path
}
 
@end

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我.

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