简易聊天 汽包 自适应

#pragma mark -  聊天气泡的自适应

- (void)bubblesToCalculate{

    

    CGRect rect = [_field.text boundingRectWithSize:CGSizeMake(180, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin| NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:15]} context:Nil];

    

    CGSize size = rect.size;

    

    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(SCREEN_WIDTH-size.width-15, 5, size.width+15, size.height+15)];

    

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, size.width+15, size.height+15)];

    

    UIImage *bgImg = [UIImage imageNamed:@"bubbleSelf"];

    

    UIImage *image = [bgImg stretchableImageWithLeftCapWidth:10 topCapHeight:10];

    

    imageView.image = image;

    

    [view addSubview:imageView];

    

    UILabel *lab = [[UILabel alloc] initWithFrame:CGRectMake(5, 2, size.width, size.height+5)];

    lab.font = [UIFont systemFontOfSize:15];

    

    lab.numberOfLines = 0;

    

    lab.text =_field.text;

    

    view.tag = 10;

    

    [view addSubview:lab];

    

    [_messageArray addObject:view];

    

    [_bgView reloadData];

    

    _field.text = @"";

    

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:_messageArray.count - 1 inSection:0];

    

    [_bgView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];

    

    

    [_field resignFirstResponder];

    [UIView animateWithDuration:0.34 animations:^{

        _inputView.frame = CGRectMake(0, self.view.frame.size.height-60, SCREEN_WIDTH, 40);

        

    }];

    [lab release];

    [view release];

    [imageView release];

    

}