801597112366_.pic.jpg

import "BaseViewController.h"

#import "BaseViewController.h"

@interface BaseViewController ()

// 高度缓存
@property (nonatomic, strong) NSMutableDictionary *heightAtIndexPath;

@end

@implementation BaseViewController

//主动实现代理 子类可不用实现 实现即为覆盖
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    NSNumber *height = @(cell.frame.size.height);
    [self.heightAtIndexPath setObject:height forKey:indexPath];
}

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {
     NSNumber *height = [self.heightAtIndexPath objectForKey:indexPath];
       if(height)
       {
           return height.floatValue;
       }
       else
       {
           return 100;
       }
}

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

#pragma mark - Getters
- (NSMutableDictionary *)heightAtIndexPath
{
    if (!_heightAtIndexPath) {
        _heightAtIndexPath = [NSMutableDictionary dictionary];
    }
    return _heightAtIndexPath;
}

controller

#import "MyViewController.h"
#import "ListModel.h"
#import "MyTableViewCell.h"

@interface MyViewController ()<UITableViewDelegate,UITableViewDataSource>

@property(nonatomic,strong) UITableView *tableView;
@property(nonatomic,strong) UIButton *moveBtn;

@property (nonatomic, strong) NSMutableArray *dataArray;



@end

@implementation MyViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    
    [self.view addSubview:self.tableView];
    [self.view addSubview:self.moveBtn];
    [self.view bringSubviewToFront:self.moveBtn];
}



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.dataArray.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    MyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:NSStringFromClass([MyTableViewCell class]) forIndexPath:indexPath];
    cell.model = self.dataArray[indexPath.row];
    return cell;
}

#pragma mark - 懒加载
- (UITableView *)tableView
{
    if (!_tableView) {
        _tableView = [[UITableView alloc]initWithFrame:CGRectZero style:UITableViewStyleGrouped];
        _tableView.frame = CGRectMake(0, kTopHeight, kScreenWidth, 800);
        _tableView.delegate = self;
        _tableView.dataSource = self;
        [_tableView registerClass:[MyTableViewCell class] forCellReuseIdentifier:NSStringFromClass([MyTableViewCell class])];
    }
    return _tableView;
}

- (UIButton *)moveBtn
{
    if (!_moveBtn) {
        _moveBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        _moveBtn.frame = CGRectMake(self.view.frame.size.width-100, 100, 100, 100);
        _moveBtn.backgroundColor = [UIColor redColor];
        _moveBtn.userInteractionEnabled = YES;
        [_moveBtn addTarget:self action:@selector(goToAdvertDetail) forControlEvents:UIControlEventTouchUpInside];
    }
    return _moveBtn;
}

#pragma mark - Getters
- (NSMutableArray *)dataArray
{
    if (!_dataArray)
    {
        _dataArray = [NSMutableArray array];
        
        NSString *string = @"Siri 让你能够利用语音来完成发送信息、安排会议、查看最新比分等更多事务。只要说出你想做的事，Siri 就能帮你办到。Siri 可以听懂你说的话、知晓你的心意，甚至还能有所回应。iOS 7 中的 Siri 拥有新外观、新声音和新功能。它的界面经过重新设计，以淡入视图浮现于任意屏幕画面的最上层。Siri 回答问题的速度更快，还能查询更多信息源，如维基百科。它可以承担更多任务，如回电话、播放语音邮件、调节屏幕亮度，以及更多。";
        
        //生成假数据
        for (int i = 0; i < 100; i++)
        {
            ListModel *model = [[ListModel alloc] init];
            NSInteger index = (arc4random()%(string.length / 20)) * 20;
            model.desc = [string substringToIndex:MAX(20, index)];
            
            [_dataArray addObject:model];
        }
    }
    return _dataArray;
}

cell

#import "MyTableViewCell.h"

@interface MyTableViewCell()

@property(nonatomic,strong) UIImageView *headImg;
@property(nonatomic,strong) UILabel *titleLabel;

@end

@implementation MyTableViewCell

- (void)awakeFromNib {
    [super awakeFromNib];
    // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}


- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
   self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.contentView.backgroundColor = [UIColor whiteColor];
        self.selectionStyle              = UITableViewCellSelectionStyleNone;
        
        [self setUpUI];
    }
    return self;
}

- (void)setModel:(ListModel *)model{
    _model = model;
    
    self.headImg.image = [UIImage imageNamed:@"timg"];
    self.titleLabel.text = model.desc;
}

- (void)setUpUI{
    
    [self.contentView addSubview:self.headImg];
    [self.headImg mas_makeConstraints:^(MASConstraintMaker *make) {
           make.top.left.equalTo(self.contentView).offset(10);
           make.width.mas_equalTo(120);
           make.height.mas_equalTo(120);

       }];
    
    [self.contentView addSubview:self.titleLabel];
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
           make.top.equalTo(self.headImg);
           make.left.equalTo(self.headImg.mas_right).offset(10);
           make.height.mas_greaterThanOrEqualTo(self.headImg.mas_height); // 设置最小高度
           make.bottom.right.equalTo(self.contentView).offset(-10);
    }];
    
}


- (UIImageView *)headImg
{
    if (!_headImg) {
        _headImg = [[UIImageView alloc]init];
        [self.contentView addSubview:_headImg];
    }
    return _headImg;
}


- (UILabel *)titleLabel
{
    if (!_titleLabel) {
        _titleLabel = [[UILabel alloc]init];
        _titleLabel.numberOfLines = 0;
        _titleLabel.font = [UIFont systemFontOfSize:15];
        _titleLabel.textColor = [UIColor darkTextColor];
        [self.contentView addSubview:_titleLabel];
    }
    return _titleLabel;
}

@end