根据文本大小更改UITextView的高度 - ios7

Question

我已经在这个网站上阅读了几个解决方案并尝试了所有这些解决方案，但仍然没有运气。目前，我的测试是一个viewController，其中包含UITextView。我试图根据文字大小调整UITextView的高度。

好消息：下面引用的解决方案似乎在我的UITextView中设置了正确的高度。

“Link”

糟糕：在获得理想高度后，UITextView似乎不允许设置高度。下面的代码显示了我用来完成此操作的几种不同尝试。目前第三种尝试方法似乎是最接近的，但它仍然留给我一个固定的高度UITextView。

以下是来自第三部分的最新日志的输出。似乎一切正常，但UITextView没有调整大小。

2013-10-11 08:27:03.374 textexpand[25273:a0b] The bounds height 872.000000
2013-10-11 08:27:03.377 textexpand[25273:a0b] The frame height 872.000000
2013-10-11 08:27:03.378 textexpand[25273:a0b] The frame height 872.000000
2013-10-11 08:27:03.380 textexpand[25273:a0b] The frame height 785.000000
2013-10-11 08:27:03.381 textexpand[25273:a0b] The bounds height 785.000000

以下是代码：

- (void)viewDidLoad
{
[super viewDidLoad];

[self thirdtry];

}

////

- (void) firsttry
{
NSString *theText = @"Here is the text I am going to load into the textview.   The text view should automatically expand the height based on the size of the content, but leave the width static.   Also, I would ideally add my own padding to the bottom and top of the uitext view. More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text";

_theTextView.text = theText;

_theTextView.scrollEnabled = NO;
[_theTextView sizeToFit];
[_theTextView layoutIfNeeded];

CGRect frame = _theTextView.frame;
frame.size.height = _theTextView.contentSize.height;
_theTextView.frame = frame;

}

////

- (void) secondtry
{
NSString *theText = @"Here is the text I am going to load into the textview.   The text view should automatically expand the height based on the size of the content, but leave the width static.   Also, I would ideally add my own padding to the bottom and top of the uitext view. More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text";

NSAttributedString *attText = [[NSAttributedString alloc] initWithString:theText attributes:nil];
CGRect frame = _theTextView.frame;
CGFloat myfloat = [self textViewHeightForAttributedText:attText andWidth:100];
NSLog(@"The float is %f", myfloat);
frame.size.height = [self textViewHeightForAttributedText:attText andWidth:100];
_theTextView.frame = frame;


}

////

- (void) thirdtry
{

_theTextView.scrollEnabled = NO;

NSString *theText = @"Here is the text I am going to load into the textview.   The text view should automatically expand the height based on the size of the content, but leave the width static.   Also, I would ideally add my own padding to the bottom and top of the uitext view. More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text More text";

NSAttributedString *attText = [[NSAttributedString alloc] initWithString:theText attributes:nil];

//Attempt to adjust the bounds
CGRect bounds = _theTextView.bounds;
bounds.size.height = [self textViewHeightForAttributedText:attText andWidth:100];
NSLog(@"The bounds height %f", bounds.size.height);
_theTextView.bounds = bounds;

//Attempt to adjust the frame
CGRect frame = _theTextView.frame;
frame.size.height = [self textViewHeightForAttributedText:attText andWidth:100];
_theTextView.frame = frame;
NSLog(@"The frame height %f", frame.size.height);

NSLog(@"The frame height %f", _theTextView.frame.size.height);
[_theTextView sizeToFit];
NSLog(@"The frame height %f", _theTextView.frame.size.height);
}

////

- (CGFloat)textViewHeightForAttributedText: (NSAttributedString*)text andWidth: (CGFloat)width
{
UITextView *calculationView = [[UITextView alloc] init];
[calculationView setAttributedText:text];
CGSize size = [calculationView sizeThatFits:CGSizeMake(width, FLT_MAX)];
return size.height;

}

更新

我应该补充一点，我可以通过使用这种方法初始化代码中的uitextbox来获得所需的效果：

CGFloat myfloat= [self textViewHeightForAttributedText:attText andWidth:300];
_theTextView = [[UITextView alloc] initWithFrame:CGRectMake(350, 100, 300, myfloat)];
_theTextView.text = theText;
[_theview addSubview:_theTextView];

但是，我不希望这样做，并在运行中调整IB中定义的帧。

Answer 1

这是一个可以帮助你的github回购：resizableTextView