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自定义cell自适应高度(17-08-14)

自定义cell自适应高度(17-08-14)

作者: Hilarylii | 来源:发表于2017-08-14 09:55 被阅读0次
    //
    //  ViewController.m
    //  UI07_cell自适应高度
    //
    //  Created by lanou3g on 17/8/11.
    //  Copyright © 2017年 lanou3g. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "Model.h"
    #import "ModelCell.h"
    
    @interface ViewController () <UITableViewDataSource,UITableViewDelegate>
    
    @property (nonatomic, retain) NSArray *modelArray;
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
        
        [self getData];
        
        UITableView *tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
        tableView.delegate = self;
        tableView.dataSource = self;
        [self.view addSubview:tableView];
    }
    //获取数据
    - (void)getData {
        Model *model1 = [[Model alloc] init];
        model1.imageName = @"1.png";
        model1.imageDescription = @"我是小黄人哇哈哈哈哈哈哈哈哈哈";
        Model *model2 = [[Model alloc] init];
        model2.imageName = @"3.JPG";
        model2.imageDescription = @"那个baby啦啦啦啦啦啦";
        
        self.modelArray = @[model1,model2];
    }
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
        return self.modelArray.count;
    }
    
    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
        Model *model = self.modelArray[indexPath.row];
        CGSize imageSize = [UIImage imageNamed:model.imageName].size;
        CGFloat scale = tableView.bounds.size.width / imageSize.width;
        CGFloat imageHeight = imageSize.height * scale;
        CGRect rect = [model.imageDescription boundingRectWithSize:CGSizeMake(tableView.bounds.size.width, 1000.f) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:20.f]} context:nil];
        
        return imageHeight + rect.size.height;
    }
    
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  {
        Model *model = self.modelArray[indexPath.row];
        static NSString *modelIdentifier = @"model";
        ModelCell *cell = [tableView dequeueReusableCellWithIdentifier:modelIdentifier];
        if (nil == cell) {
            cell = [[ModelCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:modelIdentifier];
        }
        cell.model = model;
        return cell;
    }
    
    
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    @end
    
    
    //
    //  Model.h
    //  UI07_cell自适应高度
    //
    //  Created by lanou3g on 17/8/11.
    //  Copyright © 2017年 lanou3g. All rights reserved.
    //
    
    #import <Foundation/Foundation.h>
    
    @interface Model : NSObject
    
    @property (nonatomic, retain) NSString *imageName;
    @property (nonatomic, retain) NSString *imageDescription;
    
    @end
    
    
    //
    //  ModelCell.h
    //  UI07_cell自适应高度
    //
    //  Created by lanou3g on 17/8/11.
    //  Copyright © 2017年 lanou3g. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    #import "Model.h"
    
    @interface ModelCell : UITableViewCell
    
    @property (nonatomic, retain) Model *model;
    
    @end
    
    
    //
    //  ModelCell.m
    //  UI07_cell自适应高度
    //
    //  Created by lanou3g on 17/8/11.
    //  Copyright © 2017年 lanou3g. All rights reserved.
    //
    
    #import "ModelCell.h"
    
    @interface ModelCell ()
    
    @property (nonatomic, retain) UIImageView *modelImageView;
    @property (nonatomic, retain) UILabel *modelImageDescriptionLabel;
    
    @end
    
    @implementation ModelCell
    
    - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
        self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
        if (self) {
            self.modelImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
            self.modelImageView.backgroundColor = [UIColor redColor];
            self.modelImageDescriptionLabel = [[UILabel alloc] initWithFrame:CGRectZero];
            self.modelImageDescriptionLabel.backgroundColor = [UIColor greenColor];
            self.modelImageDescriptionLabel.font = [UIFont systemFontOfSize:20.f];
            self.modelImageDescriptionLabel.numberOfLines = 0;
            [self.contentView addSubview:self.modelImageView];
            [self.contentView addSubview:self.modelImageDescriptionLabel];
        }
        return self;
    }
    
    - (void)setModel:(Model *)model {
        if (_model != model) {
            _model = model;
            self.modelImageView.image = [UIImage imageNamed:model.imageName];
            self.modelImageDescriptionLabel.text = model.imageDescription;
        }
    }
    
    -(void)layoutSubviews {
        [super layoutSubviews];
        CGSize imageSize = self.modelImageView.image.size;
        CGFloat scale = self.contentView.bounds.size.width / imageSize.width;
        self.modelImageView.frame = CGRectMake(0, 0, self.contentView.bounds.size.width, imageSize.height * scale);
        //计算字符串的高度
         // 参数1:文本计算需要给定的尺寸
         // 参数2:计算选项(以行和字体为标准进行计算)
         // 参数3:字符串的属性
         // 参数4:绘制上下文(填nil)
        CGRect rect = [self.model.imageDescription boundingRectWithSize:CGSizeMake(self.contentView.frame.size.width, 1000.f) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSAttachmentAttributeName : [UIFont systemFontOfSize:20.f]} context:nil];
        self.modelImageDescriptionLabel.frame = CGRectMake(0, self.modelImageView.frame.size.height + 10, self.contentView.frame.size.width, rect.size.height);
        
    }
    
    
    
    
    - (void)awakeFromNib {
        // Initialization code
    }
    
    - (void)setSelected:(BOOL)selected animated:(BOOL)animated {
        [super setSelected:selected animated:animated];
    
        // Configure the view for the selected state
    }
    
    @end
    
    

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