TableViewCell自适应高度

• 自上而下设置好约束条件（让系统知道cell高度）
• 代码相关：

    _tableView.rowHeight = UITableViewAutomaticDimension;
    _tableView.estimatedRowHeight = [TYStationListCell cellHeight];

UITableView不进行reload改变Cell的高度

调用UITableview的beginUpdates和endUpdates，这个时候仅仅会去触发heightForRow方法，而不会走cellForRow或其他，所以这种写法最适合这种情况，这种刷新还是自带动画

#import "TYUserBaseInfoCell.h"
#import "TYEdgeInsetsLabel.h"

@interface TYUserBaseInfoCell()<UITextViewDelegate>

@property (weak, nonatomic) IBOutlet UITextView *textView;
@property (weak, nonatomic) IBOutlet TYEdgeInsetsLabel *titleLabel;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *textViewHeightConstraint;  //xib中的priority设置为750，否则会有约束警告

@end

@implementation TYUserBaseInfoCell

+ (CGFloat)cellHeight
{
    return 30;
}

- (void)awakeFromNib {
    [super awakeFromNib];
    // Initialization code
    
    _titleLabel.numberOfLines = 0;
    _titleLabel.font = [UIFont systemFontOfSize:15];
    _titleLabel.edgeInsets = UIEdgeInsetsMake(4, 0, 4, 0);
    
    _textView.delegate = self;
    _textView.layer.borderWidth = 1;
    _textView.layer.borderColor = [UIColor grayColor].CGColor;
}

- (void)refreshWithTitle:(NSString *)title content:(NSString *)content
{
    _titleLabel.text = title;
    _textView.text = content;
    _textViewHeightConstraint.constant = _textView.contentSize.height > 100 ? 100 : _textView.contentSize.height;
}

- (void)setEditable:(BOOL)editable
{
    _textView.editable = editable;
}

- (void)setContentColor:(UIColor *)contentColor
{
    _textView.textColor = contentColor;
}

#pragma mark - UITextViewDelegate

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    if ([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];
        return NO;
    }
    else {
        return YES;
    }
}

- (void)textViewDidChange:(UITextView *)textView
{
    if (textView.contentSize.height > 100) {
        _textViewHeightConstraint.constant = 100;
    }
    else {
        _textViewHeightConstraint.constant = textView.contentSize.height;
    }
    if ([_delegate respondsToSelector:@selector(userBaseInfoCell:contentDidChange:)]) {
        [_delegate userBaseInfoCell:self contentDidChange:textView.text];
    }
}

###controller中实现代理方法
#pragma mark - TYUserBaseInfoCellDelegate

- (void)userBaseInfoCell:(TYUserBaseInfoCell *)cell contentDidChange:(NSString *)content
{
    NSInteger index = [_tableView indexPathForCell:cell].row;
    //刷新array中内容
    [_contentArray replaceObjectAtIndex:index withObject:content];
    //只会改变cell的高度，不会reloadcell
    [_tableView beginUpdates];
    [_tableView endUpdates];
}