ios uitableviewcell动态计算高度

#import <UIKit/UIKit.h>

@interface TestCell : UITableViewCell
@property (weak, nonatomic) IBOutlet UILabel *testLabel;
- (void)parseResult:(NSString *)result;
@end
#import "TestCell.h"

@implementation TestCell

- (void)awakeFromNib {

}
- (void)parseResult:(NSString *)result
{
    _testLabel.text= result;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end

#import "ViewController.h"
#import "TestCell.h"
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
{

    NSArray *dataArray;
}
@property (weak, nonatomic) IBOutlet UITableView *testTableView;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    dataArray = @[@"1234\n56789012\n34567\n]\n890\n12341\n2\n3\n4\n5\n6",  @"12345\n67890\n1234\n56789\n01234\n567890", @"1\n2", @"1\n2\n3", @"1\n"];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return ;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return dataArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    TestCell *cell = [tableView dequeueReusableCellWithIdentifier:@"TestCell" forIndexPath:indexPath];
    [cell parseResult:dataArray[indexPath.row]];
    return cell;

}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    TestCell *cell = [tableView dequeueReusableCellWithIdentifier:@"TestCell"];
    [cell parseResult:dataArray[indexPath.row]];
    CGSize size = [cell.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
    NSLog(@"第%ld行的高度=%f",indexPath.row ,size.height + );
    return   + size.height;

}

@end