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