OC代码实现TableView

前言

前面的文章也提到了，我下面会通过OC、Swift、SwiftUI、Flutter来分别实现我们常用的TableView，通过小demo来对比各方的实现方案已经代码量的多少，并且自己也做到简单的总结。

下面是OC写的TableView，相信这个这个大家都会了（这个不会就说不过去了）。

Demo比较简单，就是一个普通的TableView，自定义的cell样式，数据都是写死的，没有数据请求。

上代码

//
//  ViewController.m
//  WMOCTableView
//
//  Created by Mengmeng Wang on 2022/6/20.
//

#import "ViewController.h"
#import "WMCell.h"

@interface ViewController () 

@property (nonatomic, strong) UITableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view addSubview:self.tableView];
}

- (UITableView *)tableView{
    if (!_tableView){
        _tableView = [[UITableView  alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height) style:UITableViewStylePlain];
        _tableView.delegate = self;
        _tableView.dataSource = self;
        _tableView.backgroundColor = [UIColor lightGrayColor];
        _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    }
    return _tableView;
}

#pragma mark - UITableViewDataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return 100;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 150;
}

- (WMCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *ide = @"cell";
    WMCell *cell = [tableView dequeueReusableCellWithIdentifier:ide];
    if (cell == nil) {
        cell = [[WMCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ide];
    }
    return cell;
}


@end

//
//  WMCell.m
//  WMOCTableView
//
//  Created by Mengmeng Wang on 2022/6/20.
//

#import "WMCell.h"

@interface WMCell()

@property (nonatomic, strong) UIView *backView;

@property (nonatomic, strong) UIImageView *iconImageView;

@property (nonatomic, strong) UILabel *titleLabel;

@property (nonatomic, strong) UILabel *msgLabel;

@end


@implementation WMCell

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.contentView.backgroundColor = [UIColor lightGrayColor];
        [self.contentView addSubview:self.backView];
        [self.backView addSubview:self.iconImageView];
        [self.backView addSubview:self.titleLabel];
        [self.backView addSubview:self.msgLabel];
    }
    return self;
}

#pragma mark - get
- (UIView *)backView{
    if (!_backView) {
        _backView = [[UIView alloc] init];
        _backView.frame = CGRectMake(10, 10, [UIScreen mainScreen].bounds.size.width - 20, 130);
        _backView.backgroundColor = [UIColor whiteColor];
        _backView.layer.masksToBounds = YES;
        _backView.layer.cornerRadius = 15;
    }
    return _backView;
}

- (UIImageView *)iconImageView{
    if (!_iconImageView) {
        _iconImageView = [[UIImageView alloc] init];
        _iconImageView.frame = CGRectMake(10, 10, 60, 60);
        _iconImageView.backgroundColor = [UIColor redColor];
    }
    return _iconImageView;
}

- (UILabel *)titleLabel{
    if (!_titleLabel) {
        _titleLabel = [[UILabel alloc] init];
        _titleLabel.frame = CGRectMake(CGRectGetMaxX(self.iconImageView.frame) + 10, 10, 250, 20);
        _titleLabel.text = @"阿斯顿发发电房打发的发送到发送到发送到发斯蒂芬啊阿斯顿发大法师打发";
        _titleLabel.textColor = [UIColor blackColor];
        _titleLabel.font = [UIFont systemFontOfSize:17];
    }
    return _titleLabel;
}

- (UILabel *)msgLabel{
    if (!_msgLabel) {
        _msgLabel = [[UILabel alloc] init];
        _msgLabel.frame =  CGRectMake(CGRectGetMaxX(self.iconImageView.frame) + 10, CGRectGetMaxY(self.titleLabel.frame) + 10, 250, 40);
        _msgLabel.text = @"adfadfafafadfadfasdfasdfasdflasdfkasdfjalskdfjaslkdfjasdklfajsdflkasjdflaksdfjaskldfjalskdfjadslkfjasdklfajsdlfkasdjfs";
        _msgLabel.textColor = [UIColor blackColor];
        _msgLabel.numberOfLines = 2;
        _msgLabel.font = [UIFont systemFontOfSize:14];
    }
    return _msgLabel;
}

@end