• iOS开发-在表单元中添加子视图


    #import <UIKit/UIKit.h>
    
    @interface NameAndColorCellTableViewCell : UITableViewCell
    
    @property(copy,nonatomic) NSString *name;
    @property(copy,nonatomic) NSString *color;
    
    @end
    NameAndColorCellTableViewCell.h
    //
    //  NameAndColorCellTableViewCell.m
    //  Tabel Cells
    //
    //  Created by  Jierism on 16/7/21.
    //  Copyright © 2016年  Jierism. All rights reserved.
    //
    
    #import "NameAndColorCellTableViewCell.h"
    
    @interface NameAndColorCellTableViewCell ()
    
    // 定义两个属性变量
    @property(strong,nonatomic) UILabel *nameLabel;
    @property(strong,nonatomic) UILabel *colorLabel;
    
    @end
    
    @implementation NameAndColorCellTableViewCell
    
    - (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) {
            // 初始化代码
            // 往表单元里面添加子视图
            // 这里在每个表单元里添加了四个Label
            CGRect nameLabelRect = CGRectMake(0, 5, 70, 15);
            UILabel *nameMaker = [[UILabel alloc] initWithFrame:nameLabelRect];
            nameMaker.textAlignment = NSTextAlignmentRight;  // 右对齐
            nameMaker.text = @"Name:";
            nameMaker.font = [UIFont boldSystemFontOfSize:12];
            [self.contentView addSubview:nameMaker];
            
            CGRect colorLabelRect = CGRectMake(0, 26, 70, 15);
            UILabel *colorMaker = [[UILabel alloc] initWithFrame:colorLabelRect];
            colorMaker.textAlignment = NSTextAlignmentRight;
            colorMaker.text = @"Color:";
            colorMaker.font = [UIFont boldSystemFontOfSize:12];
            [self.contentView addSubview:colorMaker];
            
            CGRect nameValueRect = CGRectMake(80, 5, 200, 15);
            self.nameLabel = [[UILabel alloc] initWithFrame:nameValueRect];
            [self.contentView addSubview:_nameLabel];
            
            CGRect colorValueRect = CGRectMake(80, 25, 200, 15);
            self.colorLabel = [[UILabel alloc] initWithFrame:colorValueRect];
            [self.contentView addSubview:_colorLabel];
            
        }
        return self;
    }
    
    // 重写了Name和Color的set方法,当传递一个新的值时,更新标签的额内容
    - (void) setName:(NSString *)n {
        if (![n isEqualToString:_name]) {
            _name = [n copy];
            self.nameLabel.text = _name;
        }
    }
    
    - (void)setColor:(NSString *)c {
        if (![c isEqualToString:_color]) {
            _color = [c copy];
            self.colorLabel.text = _color;
        }
    }
    
    @end
    NameAndColorCellTableViewCell.m
    #import <UIKit/UIKit.h>
    
    @interface ViewController : UIViewController<UITableViewDataSource>
    
    @end
    ViewController.h
    //
    //  ViewController.m
    //  Tabel Cells
    //
    //  Created by  Jierism on 16/7/20.
    //  Copyright © 2016年  Jierism. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "NameAndColorCellTableViewCell.h"
    
    static NSString *CellTableIdentifier = @"CellTableIdentifier";
    
    @interface ViewController ()
    
    // 定义一个数组和输出接口
    @property (copy,nonatomic) NSArray *computers;
    @property (weak,nonatomic) IBOutlet UITableView *tableView;
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
        
        // 往数组里定义字典
        self.computers = @[@{@"Name" : @"MacBook Air",@"Color" : @"Sliver"},
                           @{@"Name" : @"MacBook Pro",@"Color" : @"Sliver"},
                           @{@"Name" : @"iMac",@"Color" : @"Sliver"},
                           @{@"Name" : @"Mac Mini",@"Color" : @"Sliver"},
                           @{@"Name" : @"Mac Pro",@"Color" : @"Black"},];
        [self.tableView registerClass:[NameAndColorCellTableViewCell class] forCellReuseIdentifier:CellTableIdentifier];
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    
    // DataSource方法
    
    // 返回数组元素个数的行数,这里return的数不能大于元素的个数,否则崩溃
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
        return [self.computers count];
    }
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        NameAndColorCellTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellTableIdentifier forIndexPath:indexPath];
        
        NSDictionary *rowData = self.computers[indexPath.row];
        
        cell.name = rowData[@"Name"];
        cell.color = rowData[@"Color"];
        
        return cell;
    }
    
    @end
    ViewController.m

    以上代码手动实现了在表单元中添加了4个Label,并显示相关内容,运行效果如图

    这个效果还有另外一种实现方法,就是使用storyboard,用nib实现。不过之前与一位师兄交流中得知,以后工作中用代码实现视图布局比较多,因为会解决很多问题。在这之前自己做的都是使用storyboard,虽然现在觉得使用起来会省事,但是到了开发大型的APP的时候who know,right?所以,自己还需要提升用代码实现布局的能力。

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  • 原文地址:https://www.cnblogs.com/jierism/p/5701883.html
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