设置UITextView根据内容动态设置高度的简单方法

 

今天给大家介绍的是设置UITextView根据内容动态设置高度，我用的是SDLayout的布局方式，方法很简单可以根据自己的布局方式做修改，直接上代码：

- (void)textViewTextDidChangeNotiAction:(NSNotification *)obj{        UITextView *textView = (UITextView *)obj.object;    if(textView == self.contentTextView){                //获得textView的初始尺寸        CGFloat width = CGRectGetWidth(self.contentTextView.frame);        CGFloat height = CGRectGetHeight(self.contentTextView.frame);        //获取当前内容下的textView的尺寸        CGSize newSize = [self.contentTextView sizeThatFits:CGSizeMake(width,MAXFLOAT)];                CGRect newFrame = self.contentTextView.frame;               // newFrame.size = CGSizeMake(fmax(width, newSize.width), fmax(height, newSize.height));        newFrame.size = CGSizeMake(newSize.width, newSize.height);                LYLog(@"新高度：%f",newFrame.size.height);                //self.contentTextView.frame = newFrame;                self.contentTextView.sd_resetLayout        .topSpaceToView(self, 10.f)        .leftSpaceToView(self, 15.f)        .rightSpaceToView(self, 15.f)        .heightIs(newFrame.size.height);                self.textNumLabel.sd_resetLayout        .topSpaceToView(self.contentTextView,5.f)        .rightSpaceToView(self, 15.f)        .widthIs(100.f)        .heightIs(20.f);        [self.contentTextView updateLayout];        self.inputText = self.contentTextView.text;        if([self.contentTextView.text isEqualToString:@"这一刻的想法"]){            self.inputText = @"";        }else {                        if(self.contentTextView.text.length > 500){                [self.contentTextView endEditing:YES];                                [MBProgressHUD showText:@"内容不能超过500个字" toView:nil];                                self.inputText = [self.contentTextView.text substringToIndex:500];                self.contentTextView.text = self.inputText;            }        }                self.textNumLabel.text = [NSString stringWithFormat:@"%lu/%lu",(unsigned long)self.inputText.length,500 - self.inputText.length];                [self updateInputText];                LYLog(@"输入的内容：%@",self.contentTextView.text);    }        [self setupAutoHeightWithBottomView:self.textNumLabel bottomMargin:10.f];}

 效果如下图：

图一

图二