cell自适应textView高度

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface AutoCell : UITableViewCell

@property (nonatomic, copy) void(^callbackTextViewChangeText)(NSString *text);

@end

NS_ASSUME_NONNULL_END
///==========================================
#import "AutoCell.h"
#import <Masonry/Masonry.h>

@interface AutoCell()<UITextViewDelegate>

@property (nonatomic, strong) UITextView *cusTextView;

@end

@implementation AutoCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
        self.selectionStyle = UITableViewCellSelectionStyleNone;
        
        self.backgroundColor = [[UIColor orangeColor] colorWithAlphaComponent:0.1];
        self.contentView.backgroundColor = [[UIColor yellowColor] colorWithAlphaComponent:0.1];
        [self.contentView addSubview:self.cusTextView];
        [self p_addMasonry];
    }
    return self;
}

#pragma mark - # Private Methods
- (void)p_addMasonry {
    [self.cusTextView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(0);
        make.left.mas_equalTo(15);
        make.right.mas_equalTo(-15);
        make.height.mas_equalTo(80).priorityHigh();
        make.bottom.mas_equalTo(0).priorityLow();
    }];
}

#pragma mark - # Getter
- (UITextView *)cusTextView {
    if (!_cusTextView) {
        _cusTextView = [[UITextView alloc] init];
        _cusTextView = [[UITextView alloc] init];
        _cusTextView.delegate = self;
        _cusTextView.textColor = [UIColor whiteColor];
        _cusTextView.font = [UIFont systemFontOfSize:30];
        _cusTextView.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:0.1];
    }
    return _cusTextView;
}

- (void)textViewDidChange:(UITextView *)textView {
    if (self.callbackTextViewChangeText) {
        self.callbackTextViewChangeText(textView.text);
    }
    CGRect rect = textView.bounds;
    UITableView *tableView = [self tableView];
    CGSize maxSize = CGSizeMake(rect.size.width, CGFLOAT_MAX);
    CGSize newSize = [textView sizeThatFits:maxSize];
    if (newSize.height > 80) {
        [_cusTextView mas_updateConstraints:^(MASConstraintMaker *make) {
            make.height.mas_equalTo(newSize.height);
        }];
        [tableView beginUpdates];
        [tableView endUpdates];
    }
}

- (UITableView *)tableView {
    UIView *tableView = self.superview;
    while (![tableView isKindOfClass:[UITableView class]] && tableView) {
        tableView = tableView.superview;
    }
    return (UITableView *)tableView;
}

@end

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end
///==========================================
#import "ViewController.h"
#import "AutoCell.h"

@interface ViewController ()<UITableViewDataSource, UITableViewDelegate>

@property (nonatomic, strong) UITableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.title = @"cell自适应textView高度";
    [self.view addSubview:self.tableView];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return  10;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    AutoCell *cell = [tableView dequeueReusableCellWithIdentifier:NSStringFromClass([AutoCell class]) forIndexPath:indexPath];
    cell.callbackTextViewChangeText = ^(NSString *text) {
        NSLog(@"%@",text);
    };
    return cell;
}

- (UITableView *)tableView {
    if (!_tableView) {
        _tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
        _tableView.delegate = self;
        _tableView.dataSource = self;
        _tableView.estimatedRowHeight = 80;
        _tableView.rowHeight = UITableViewAutomaticDimension;
        _tableView.sectionHeaderHeight = 0.0;
        _tableView.sectionFooterHeight = 0.0;
        _tableView.estimatedSectionHeaderHeight = 0.0;
        _tableView.estimatedSectionFooterHeight = 0.0;
        _tableView.showsVerticalScrollIndicator = NO;
        _tableView.showsHorizontalScrollIndicator = NO;
        [_tableView registerClass:[AutoCell class] forCellReuseIdentifier:NSStringFromClass([AutoCell class])];
    }
    return _tableView;
}

@end