如何在ios中根据字符串动态调整UITextview高度
我有一个简单的如何在ios中根据字符串动态调整UITextview高度,ios,iphone,objective-c,uitextview,Ios,Iphone,Objective C,Uitextview,我有一个简单的文本视图动态填充谁的数据。我想在填充数据后调整textview的高度，这样我就不会看到垂直滚动，也不会剪切文本。我想通过编程来完成此任务。我有一个标签，应该放在文本视图高度下20像素的位置，比如“感兴趣”。我正在尝试编写代码。但是我遇到了一些问题，比如对齐问题。如果我能运行程序，输出将显示如下 这是我的程序，请帮助我 lblHobbies = [[UILabel alloc]initWithFrame:CGRectMake(10, 310, 300, 20)]; lblHo
文本视图 lblHobbies = [[UILabel alloc]initWithFrame:CGRectMake(10, 310, 300, 20)];
lblHobbies.text=@"Hobbies";
lblHobbies.font=[UIFont systemFontOfSize:16.0];
lblHobbies.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[scrollView addSubview:lblHobbies];
lblInterests = [[UILabel alloc]initWithFrame:CGRectMake(10, 420, 300, strSize.height+30)];
lblInterests.text=@"Interests";
lblInterests.font=[UIFont systemFontOfSize:16.0];
lblInterests.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[scrollView addSubview:lblInterests];
NSDictionary *attributes = @{NSFontAttributeName: [UIFont systemFontOfSize:14]};
CGRect rect =
[tViewhobbies.text boundingRectWithSize:CGSizeMake(300, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributes
context:nil];
tViewhobbies=[[UITextView alloc]init];
tViewhobbies.frame=CGRectMake(10, 330,300, rect.size.height);
[tViewhobbies setUserInteractionEnabled:NO];
tViewhobbies.backgroundColor=[UIColor colorWithRed:0.662745 green:0.662745 blue:0.662745 alpha:0.5];
tViewhobbies.delegate=self;
[scrollView addSubview:tViewhobbies];
NSDictionary *attributes1 = @{NSFontAttributeName: [UIFont systemFontOfSize:14]};
CGRect rect1 =
[tViewInterests.text boundingRectWithSize:CGSizeMake(300, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributes1
context:nil];
tViewInterests=[[UITextView alloc]init];
tViewInterests.frame=CGRectMake(10, 450, 300, rect1.size.height);
[tViewInterests setUserInteractionEnabled:NO];
tViewInterests.backgroundColor=[UIColor colorWithRed:0.662745 green:0.662745 blue:0.662745 alpha:0.5];
tViewInterests.delegate=self;
[scrollView addSubview:tViewInterests];
您可以使用自定义UITextView修复此问题： 请查看： Textview将根据用户输入的字符串动态设置高度 希望这对你有帮助
：）您可以使用自定义UITextView解决此问题： 请查看： Textview将根据用户输入的字符串动态设置高度 希望这对你有帮助
：）在此处输入代码您可以使用标签 myLabel.text = @"Your String"; CGSize labelSize = [myLabel.text sizeWithFont:myLabel.font constrainedToSize:CGSizeMake(320,MAX_HEIGHT_YOU_WANT_TO_SET) lineBreakMode:NSLineBreakByWordWrapping]; CGRect frame = myLabel.frame; frame.size.height = labelSize.height; myLabel.frame = frame; myLabel.text=@“您的字符串”； CGSize labelSize=[myLabel.text sizeWithFont:myLabel.font constrainedToSize:CGSizeMake（320，您希望设置的最大高度） lineBreakMode:NSLineBreakByWordWrapping]； CGRect frame=myLabel.frame； frame.size.height=labelSize.height； myLabel.frame=帧；
在此处输入代码，您可以使用标签 myLabel.text = @"Your String"; CGSize labelSize = [myLabel.text sizeWithFont:myLabel.font constrainedToSize:CGSizeMake(320,MAX_HEIGHT_YOU_WANT_TO_SET) lineBreakMode:NSLineBreakByWordWrapping]; CGRect frame = myLabel.frame; frame.size.height = labelSize.height; myLabel.frame = frame; myLabel.text=@“您的字符串”； CGSize labelSize=[myLabel.text sizeWithFont:myLabel.font constrainedToSize:CGSizeMake（320，您希望设置的最大高度） lineBreakMode:NSLineBreakByWordWrapping]； CGRect frame=myLabel.frame； frame.size.height=labelSize.height； myLabel.frame=帧； 我是这样做的：
+(CGFloat)getLabelDymanicHeightOfStringWithText:(NSString *)text andFont:(UIFont *)font andFrame:(CGRect )frame {
CGSize maxSize = CGSizeMake(frame.size.width, 999999.0);
int height = 0;
NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
font, NSFontAttributeName,
nil];
if (IS_IOS_6)//iOS 6 macro
{
CGSize size = [text sizeWithFont:font
constrainedToSize:maxSize
lineBreakMode:NSLineBreakByWordWrapping];
height = size.height;
}
else
{
CGRect frame = [text boundingRectWithSize:maxSize
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributesDictionary
context:nil];
height = frame.size.height;
}
return height+5;
}
+(CGFloat)getLabelDymanicHeightOfStringWithText:(NSString *)text andFont:(UIFont *)font andFrame:(CGRect )frame {
CGSize maxSize = CGSizeMake(frame.size.width, 999999.0);
int height = 0;
NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
font, NSFontAttributeName,
nil];
if (IS_IOS_6)//iOS 6 macro
{
CGSize size = [text sizeWithFont:font
constrainedToSize:maxSize
lineBreakMode:NSLineBreakByWordWrapping];
height = size.height;
}
else
{
CGRect frame = [text boundingRectWithSize:maxSize
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributesDictionary
context:nil];
height = frame.size.height;
}
return height+5;
}
将此方法传递给您的文本字体和框架。查看下面的代码希望对您有所帮助
self.scrollView.contentSize = CGSizeMake(320, 700);
UILabel *lblHobbies = [[UILabel alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + 2, 75, 40)];
lblHobbies.text=@"Hobbies";
lblHobbies.font=[UIFont systemFontOfSize:16.0];
lblHobbies.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[self.scrollView addSubview:lblHobbies];
//add this after the hobbies textview so u need to calculate the height, so wy dont you put some helper method that returns the height for the text
//i took some long text that u want to display
NSString *str = @"BARCELONA, Spain -- Nokia is targeting emerging markets with three low-cost smartphones that use Google's Android operating system rather than the Windows Phone software from Microsoft, which is about to buy Nokia's phone business";
CGSize hobbiesTextViewSize = [self calculateHeightForString:str];
//now set the hobbiesTextView frame and also the text
UITextView *tViewhobbies = [[UITextView alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + 40, hobbiesTextViewSize.width, hobbiesTextViewSize.height+ 5)];
tViewhobbies.font = [UIFont systemFontOfSize:17.0f];
tViewhobbies.text = str;//set the text hear
[self.scrollView addSubview:tViewhobbies];
//now add the lblInterests label
UILabel *lblInterests = [[UILabel alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + lblHobbies.frame.size.height + hobbiesTextViewSize.height + 2, 75, 40)];
lblInterests.text=@"Interests";
lblInterests.font=[UIFont systemFontOfSize:16.0];
lblInterests.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[self.scrollView addSubview:lblInterests];
NSString *str1 = @"Nokia will ditch many of the Google services that come with Android, which Google lets phone makers customize at will. Instead, the new Nokia X line announced Monday will emphasize Microsoft services such as Bing search, Skype communications and OneDrive file storage. Its home screen sports larger, resizable tiles resembling those on Windows phone.";
//now calculate the height for Interests text
CGSize interestTextViewSize = [self calculateHeightForString:str1];
UITextView *tViewInterests = [[UITextView alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + lblHobbies.frame.size.height + lblInterests.frame.size.height + tViewhobbies.frame.size.height + 4, interestTextViewSize.width + 2, interestTextViewSize.height+ 2)];
tViewInterests.font = [UIFont systemFontOfSize:17.0f];
tViewInterests.text = str1;
[self.scrollView addSubview:tViewInterests];
}
//our helper method
- (CGSize)calculateHeightForString:(NSString *)str
{
CGSize size = CGSizeZero;
UIFont *labelFont = [UIFont systemFontOfSize:17.0f];
NSDictionary *systemFontAttrDict = [NSDictionary dictionaryWithObject:labelFont forKey:NSFontAttributeName];
NSMutableAttributedString *message = [[NSMutableAttributedString alloc] initWithString:str attributes:systemFontAttrDict];
CGRect rect = [message boundingRectWithSize:(CGSize){320, MAXFLOAT}
options:NSStringDrawingUsesLineFragmentOrigin
context:nil];//you need to specify the some width, height will be calculated
size = CGSizeMake(rect.size.width, rect.size.height + 5); //padding
return size;
}
通过下面的代码希望能帮助你
self.scrollView.contentSize = CGSizeMake(320, 700);
UILabel *lblHobbies = [[UILabel alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + 2, 75, 40)];
lblHobbies.text=@"Hobbies";
lblHobbies.font=[UIFont systemFontOfSize:16.0];
lblHobbies.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[self.scrollView addSubview:lblHobbies];
//add this after the hobbies textview so u need to calculate the height, so wy dont you put some helper method that returns the height for the text
//i took some long text that u want to display
NSString *str = @"BARCELONA, Spain -- Nokia is targeting emerging markets with three low-cost smartphones that use Google's Android operating system rather than the Windows Phone software from Microsoft, which is about to buy Nokia's phone business";
CGSize hobbiesTextViewSize = [self calculateHeightForString:str];
//now set the hobbiesTextView frame and also the text
UITextView *tViewhobbies = [[UITextView alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + 40, hobbiesTextViewSize.width, hobbiesTextViewSize.height+ 5)];
tViewhobbies.font = [UIFont systemFontOfSize:17.0f];
tViewhobbies.text = str;//set the text hear
[self.scrollView addSubview:tViewhobbies];
//now add the lblInterests label
UILabel *lblInterests = [[UILabel alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + lblHobbies.frame.size.height + hobbiesTextViewSize.height + 2, 75, 40)];
lblInterests.text=@"Interests";
lblInterests.font=[UIFont systemFontOfSize:16.0];
lblInterests.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[self.scrollView addSubview:lblInterests];
NSString *str1 = @"Nokia will ditch many of the Google services that come with Android, which Google lets phone makers customize at will. Instead, the new Nokia X line announced Monday will emphasize Microsoft services such as Bing search, Skype communications and OneDrive file storage. Its home screen sports larger, resizable tiles resembling those on Windows phone.";
//now calculate the height for Interests text
CGSize interestTextViewSize = [self calculateHeightForString:str1];
UITextView *tViewInterests = [[UITextView alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + lblHobbies.frame.size.height + lblInterests.frame.size.height + tViewhobbies.frame.size.height + 4, interestTextViewSize.width + 2, interestTextViewSize.height+ 2)];
tViewInterests.font = [UIFont systemFontOfSize:17.0f];
tViewInterests.text = str1;
[self.scrollView addSubview:tViewInterests];
}
//our helper method
- (CGSize)calculateHeightForString:(NSString *)str
{
CGSize size = CGSizeZero;
UIFont *labelFont = [UIFont systemFontOfSize:17.0f];
NSDictionary *systemFontAttrDict = [NSDictionary dictionaryWithObject:labelFont forKey:NSFontAttributeName];
NSMutableAttributedString *message = [[NSMutableAttributedString alloc] initWithString:str attributes:systemFontAttrDict];
CGRect rect = [message boundingRectWithSize:(CGSize){320, MAXFLOAT}
options:NSStringDrawingUsesLineFragmentOrigin
context:nil];//you need to specify the some width, height will be calculated
size = CGSizeMake(rect.size.width, rect.size.height + 5); //padding
return size;
}
您只需将textView的高度更改为textView.contentSize.height的高度。执行此操作时，textView将更新并显示它包含的所有文本
textView.frame = CGRectMake(textView.frame.origin.x, textView.frame.origin.y, textView.frame.size.width,textView.contentSize.height);
快乐编码：）您只需将textView的高度更改为textView.contentSize.height的高度即可。执行此操作时，textView将更新并显示它包含的所有文本
textView.frame = CGRectMake(textView.frame.origin.x, textView.frame.origin.y, textView.frame.size.width,textView.contentSize.height);
快乐编码：）对于这两种支持，请看这同时支持iOS6和ios7。请看我的答案。希望您有所了解，只需使用该代码而不是您的代码……：）对于这两种支持，请看这同时支持iOS6和IOS7。请看我的答案。希望您有所了解，只需使用您的代码即可……：）感谢您的回复。我正在尝试运行您的代码。但我在这一行遇到异常“NSMutableAttributedString*消息=[[NSMutableAttributedString alloc]initWithString:str attributes:SystemFontAttributed]；“有什么异常…！！”！！。。？它应该可以工作，等等，我会尝试清理和建立项目你从开始到结束都更换了吗？就像我做的那样，如果你仍然在单独的项目中尝试错误，只向xib添加scrollview，然后在-（void）viewDidLoad`方法和helper方法中复制并通过上述代码谢谢你的响应。我正在尝试运行你的代码。但是我得到了一个异常，这一行是“NSMutableAttributedString*message=[[NSMutableAttributedString alloc]initWithString:str attributes:systemFontAttrDict]；“有什么异常！！。。？它应该可以工作，等等，我会尝试清理和建立项目你从开始到结束都更换了吗？就像我所做的那样，如果你仍然在单独的项目中尝试错误，只向xib添加scrollview，然后在-（void）viewDidLoad`方法和helper方法中复制并通过上面的代码