popView

#import <UIKit/UIKit.h>

@protocol XPPopViewDelegate <NSObject>

- (void)returnSelectedIndexPath:(NSInteger )index;

@end

@interface XPPopView :
UIView

@property (nonatomic,strong)
NSArray *dateSource;

@property (nonatomic,assign)
id<XPPopViewDelegate> aDelegate;

- (instancetype) initWithisLeft:(BOOL)isLeft;

- (void)hideView ;

- (void)showView ;

@end

#import "XPPopView.h"

@interface
XPPopView () <UITableViewDelegate,UITableViewDataSource>

@property (nonatomic,strong)
UITableView *tableView;

@property (nonatomic,strong)
UIImageView *view;

@property (nonatomic,assign)
BOOL isLeft;

@end

@implementation XPPopView

- (instancetype) initWithisLeft:(BOOL)isLeft {

    if (self = [superinit] ) {

        _isLeft = isLeft;

        

        self.layer.shadowColor = [UIColorblackColor].CGColor;

        self.layer.shadowOffset =CGSizeMake(-3,3);

        self.layer.shadowOpacity =0.5;

        self.layer.shadowRadius =4;

        

        

        [self addSubview:self.view];

        [self addSubview:self.tableView];

    }

    return
self;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return 1;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return_dateSource.count;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    UITableViewCell *cell = [tableViewdequeueReusableCellWithIdentifier:@"CellID"];

    cell.backgroundColor = [UIColorblackColor];

    cell.textLabel.textColor = [UIColorwhiteColor];

    cell.textLabel.font = [UIFontsystemFontOfSize:15];

    

    cell.textLabel.textAlignment =NSTextAlignmentCenter;

    cell.textLabel.text =_dateSource[indexPath.row];

    

    return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    [tableView deselectRowAtIndexPath:indexPathanimated:YES];

    

    if (_aDelegate) {

        [_aDelegate
returnSelectedIndexPath:indexPath.row];

    }

    

    [self hideView];

    

}

- (UITableView *)tableView {

    if (!_tableView) {

        _tableView = [[UITableViewalloc]
initWithFrame:CGRectMake(0,5,
CGRectGetWidth(self.bounds),CGRectGetHeight(self.bounds)
-5)
style:UITableViewStylePlain];

        _tableView.delegate =self;

        _tableView.dataSource =self;

        _tableView.rowHeight =40;

        _tableView.bounces =NO;

        _tableView.separatorStyle =UITableViewCellSelectionStyleNone;

        _tableView.layer.cornerRadius =10;

        _tableView.layer.masksToBounds =YES;

        

        _tableView.backgroundColor = [UIColorblackColor];

        [_tableViewregisterClass:[UITableViewCellclass]
forCellReuseIdentifier:@"CellID"];

    }

    

    return_tableView;

}

- (UIImageView *)view {

    if (!_view) {

        _view = [[UIImageViewalloc]
init];

        

    }

    return _view;

}

- (void)hideView {

    __weak typeof (self) weakSelf =self;

    [UIViewanimateWithDuration:0.3animations:^{

        weakSelf.layer.opacity =0;

    }];

    [UIViewcommitAnimations];

    

}

- (void)showView {

    if (self.layer.opacity ==1) {

        [self hideView];

        return;

    }

    

    __weak typeof (self) weakSelf =self;

    [UIViewanimateWithDuration:0.3animations:^{

        weakSelf.layer.opacity =1;

    }];

    [UIViewcommitAnimations];

}

- (void)setDateSource:(NSArray *)dateSource {

    _dateSource = [NSArrayarrayWithArray:dateSource];

    

    NSInteger length =
0;

    for (NSString *strin dateSource) {

        (str.length > length) ? (length = str.length) : length;

    }

    

    if (!_isLeft) {

        self.frame =CGRectMake(SCREENWIDTH -30 * length -
10,0,
30 * length,_dateSource.count *40 +
5);

    }

    else {

        self.frame =CGRectMake(5,0,
30 * length,_dateSource.count *40 +
5);

    }

    [selfsetTopView];

    

    _tableView.frame =CGRectMake(0,5,
CGRectGetWidth(self.bounds),CGRectGetHeight(self.bounds)
-5);

    [_tableView
reloadData];

    

    self.layer.opacity =0;

    

    

}

- (void)setTopView {

    UIBezierPath *path = [UIBezierPathbezierPath];

    

    if (!_isLeft) {

        _view.frame =CGRectMake(CGRectGetWidth(self.frame)
-20, 0,
10, 5);

        [path moveToPoint:CGPointMake(5,0)];

        [path addLineToPoint:CGPointMake(10,5)];

        [path addLineToPoint:CGPointMake(0,5)];

    }

    else {

        _view.frame =CGRectMake(15,0,
10, 5);

        [path moveToPoint:CGPointMake(5,0)];

        [path addLineToPoint:CGPointMake(10,5)];

        [path addLineToPoint:CGPointMake(0,5)];

    }

    

    [path closePath];

    

    _view.backgroundColor = [UIColorblackColor];

    

    CAShapeLayer *maskLayer = [CAShapeLayerlayer];

    maskLayer.path = [path
CGPath];

    _view.layer.mask = maskLayer;

}

@end

使用

#import "XPPopView.h"

- (XPPopView *)popView {

    

    if (!_popView) {

        _popView = [[XPPopViewalloc]
initWithisLeft:NO];

        _popView.aDelegate =self;

        [self.popViewsetDateSource:@[@"发表",@"我的发表",@"筛选"]];

    }

    return_popView;

}

协议<XPPopViewDelegate>

- (void)returnSelectedIndexPath:(NSInteger )index {

}