#import "ViewController.h"

#define kScreenW [UIScreen mainScreen].bounds.size.width
#define kScreenH [UIScreen mainScreen].bounds.size.height

@interface ViewController ()<UITableViewDelegate,UITableViewDataSource>

@property (nonatomic,strong)NSMutableArray *datalist;

@property (nonatomic,strong)UITableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor greenColor];
    
    //从plist文件中获取数据
    _datalist = [NSMutableArray arrayWithArray:[NSArray arrayWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"news" ofType:@"plist"]]];
    
    //创建tableView --》 设置代理对象
    _tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 64, kScreenW, kScreenH-64) style:UITableViewStylePlain];
    
    _tableView.dataSource = self;
    
    _tableView.delegate = self;
    
    [self.view addSubview:_tableView];
    
}

#pragma mark --UITableViewDataSource

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
    return _datalist.count;
    
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    static NSString *identy = @"cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identy];
    
    if (cell == nil) {
        
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identy];
    }
    
    cell.textLabel.text = [_datalist objectAtIndex:indexPath.row];
    
    cell.textLabel.numberOfLines = 0;
    
    cell.textLabel.font = [UIFont systemFontOfSize:16];
        
    return cell;
    
}

#pragma mark --UITableViewDelegate

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    //1.获取要显示的字符串
    NSString *string = [_datalist objectAtIndex:indexPath.row];
    
    //2.根据字符串计算尺寸
    
        //iOS7之前的方法
//    CGSize size = [string sizeWithFont:[UIFont systemFontOfSize:16] constrainedToSize:CGSizeMake(374, 9999)];
    
        //iOS7之后的方法
    CGRect rect = [string boundingRectWithSize:CGSizeMake(374, 9999) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:16]} context:nil];

//    return size.height+30;
    
    return rect.size.height+40;

}

@end

屏幕快照 2016-03-03 下午8.04.01.png

屏幕快照 2016-03-03 下午8.03.44.png