文本计算

ModelFrame.m
放大button的frameCGFloat textW = textSize.width + 40; CGFloat textH = textSize.height + 30;

 // 计算消息正文的frame
    // 1. 先计算正文的大小
    CGSize textSize = [message.text sizeOfTextWithMaxSize:CGSizeMake(200, MAXFLOAT) font:textFont];
    CGFloat textW = textSize.width + 40;
    CGFloat textH = textSize.height + 30;
    // 2. 再计算x,y
    CGFloat textY = iconY;
    CGFloat textX = message.type == CZMessageTypeOther ? CGRectGetMaxX(_iconFrame) : (screenW - margin - iconW - textW);
    _textFrame = CGRectMake(textX, textY, textW, textH);

Model.m

添加内边距 btnText.contentEdgeInsets = UIEdgeInsetsMake(15, 20, 15, 20);

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
// 显示头像的UIImageView
        UIImageView *imgViewIcon = [[UIImageView alloc] init];
        [self.contentView addSubview:imgViewIcon];
        self.imgViewIcon = imgViewIcon;
        
        
        // 显示正文的按钮
        UIButton *btnText = [[UIButton alloc] init];
        // 设置正文的字体大小
        btnText.titleLabel.font = textFont;
        // 修改按钮的正文文字颜色
        [btnText setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
        // 设置按钮中的label的文字可以换行
        btnText.titleLabel.numberOfLines = 0;
        // 设置按钮的背景色
        //btnText.backgroundColor = [UIColor purpleColor];
        
        // 设置按钮中的titleLabel的背景色
        //btnText.titleLabel.backgroundColor = [UIColor greenColor];
        
        // 设置按钮的内边距
        btnText.contentEdgeInsets = UIEdgeInsetsMake(15, 20, 15, 20);
        
        [self.contentView addSubview:btnText];
        self.btnText = btnText;
    // 设置单元格的背景色为clearColor
    self.backgroundColor = [UIColor clearColor];
    return self;
}

image.png