在github中有许多大牛封装好的第三发类库，其中有个自适应cell高度的类库

下载地址：https://github.com/gsdios/SDAutoLayout

model类

commentsModel#import "JSONModel.h"#import "getCommentData.h"@interface commentsModel : JSONModel@property(nonatomic,copy)NSArray<getCommentData> *commentList;@end #import "commentsModel.h"@implementation commentsModel@end getCommentData#import "JSONModel.h"@protocol getCommentData@end@interface getCommentData : JSONModel@property(nonatomic,copy)NSString *message;@property(nonatomic,copy)NSString *nickName;@property(nonatomic,copy)NSString *createTimeStr;@end #import "getCommentData.h"@implementation getCommentData@end 

控制器

#import "commentsTableViewController.h"#import "commentsModel.h"#import "commentCell.h"@interface commentsTableViewController ()@property(nonatomic,strong)NSArray *commentsArray;@end@implementation commentsTableViewController-(NSArray *)commentsArray{if (_commentsArray==nil) {NSData *data=[NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"comment_list.json" ofType:nil]];commentsModel *commensM=[[commentsModel alloc]initWithData:data error:nil];_commentsArray=commensM.commentList;}return _commentsArray;}- (void)viewDidLoad {[super viewDidLoad];}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.}#pragma mark - Table view data source- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {return self.commentsArray.count;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {static NSString *ID=@"comment";commentCell *cell=[tableView dequeueReusableCellWithIdentifier:ID];if (cell==nil) {cell=[[commentCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];}cell.commentData=self.commentsArray[indexPath.row];return cell;}-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{return [self cellHeightForIndexPath:indexPath cellContentViewWidth:[self cellContentViewWith]];}-(CGFloat)cellContentViewWith{CGFloat width=[UIScreen mainScreen].bounds.size.width;if ([UIApplication sharedApplication].statusBarOrientation != UIInterfaceOrientationPortrait && [[UIDevice currentDevice].systemVersion floatValue] < 8) {width = [UIScreen mainScreen].bounds.size.height;}return width;}@end 

具体自定义cell的代码

#import <UIKit/UIKit.h>@class getCommentData;@interface commentCell : UITableViewCell@property(nonatomic,strong)getCommentData *commentData;@property(nonatomic,strong)UILabel *nameLabel;@property(nonatomic,strong)UILabel *titleLabel;@property(nonatomic,strong)UILabel *dateLabel;@end #import "commentCell.h"#import "commentsModel.h"@implementation commentCell-(void)setCommentData:(getCommentData *)commentData{_commentData=commentData;_titleLabel.text=commentData.message;_dateLabel.text=commentData.createTimeStr;_nameLabel.text=commentData.nickName;}- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];if (self) {[self setup];}return self;}-(void)setup{_nameLabel=[UILabel new];[self.contentView addSubview:_nameLabel];_nameLabel.textColor=[UIColor colorWithRed:0.891 green:0.549 blue:0.073 alpha:1.000];_nameLabel.font=[UIFont systemFontOfSize:15];_nameLabel.numberOfLines=1;_titleLabel=[UILabel new];[self.contentView addSubview:_titleLabel];_titleLabel.textColor=[UIColor darkGrayColor];_titleLabel.font=[UIFont systemFontOfSize:15];_titleLabel.numberOfLines=0;_dateLabel=[UILabel new];[self.contentView addSubview:_dateLabel];_dateLabel.textColor=[UIColor colorWithRed:0.679 green:0.166 blue:0.828 alpha:1.000];_dateLabel.font=[UIFont systemFontOfSize:15];_dateLabel.numberOfLines=1;CGFloat margin=10;UIView *contentView=self.contentView;_nameLabel.sd_layout.leftSpaceToView(contentView,margin).topSpaceToView(contentView,margin).rightSpaceToView(contentView,margin).heightIs(20);_titleLabel.sd_layout.leftSpaceToView(contentView,margin).topSpaceToView(_nameLabel,2).rightSpaceToView(contentView,margin).autoHeightRatio(0);_dateLabel.sd_layout.leftSpaceToView(contentView,margin).topSpaceToView(_titleLabel,5).heightIs(20).widthIs(150);[self setupAutoHeightWithBottomViewsArray:@[_titleLabel,_dateLabel,_nameLabel] bottomMargin:margin];}- (void)awakeFromNib {}- (void)setSelected:(BOOL)selected animated:(BOOL)animated {[super setSelected:selected animated:animated];}@end