uilabel 和uitextview 自适应大小

本文转载至 http://blog.csdn.net/liulichao20/article/details/8957752

分类： ios2013-05-21 22:06 321人阅读 评论(0) 收藏 举报

//UILabel自动换行，自适应高度

UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];

[label setBackgroundColor:[UIColor clearColor]];

[label setFont:[UIFont systemFontOfSize:14]];

[label setLineBreakMode:UILineBreakModeWordWrap];

[label setNumberOfLines:0];

[self.view addSubview:label];

NSString *str = @" fsdfadsfdsfsdfads  fdsfads水电费 水电费水电费水电费水电费水电费水电费水电费水电费水电费 水电费水电费水电费 水电费时代fsdf ";

CGSize size = [str sizeWithFont:[UIFont systemFontOfSize:14]constrainedToSize:CGSizeMake(320,500) lineBreakMode:UILineBreakModeWordWrap];

[label setText:str];

[label setFrame:CGRectMake(0.0f, 20.0f, 300, size.height)];

[label release];

//UITextView自动换行，自适应高度

UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 150, 320,240)];

textView.backgroundColor = [UIColor clearColor];

textView.text = str;

textView.scrollEnabled = YES;

textView.font = [UIFont systemFontOfSize:14];

textView.userInteractionEnabled = NO;

textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;

[self.view addSubview:textView];

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自动调整UITextView/UILabel的高度height

1 条回复

很多时候都需要依据用户输入的内容自动调整UILabel/UITextView的高度和宽度，特别是UINavigationController的标题，超过一行的时候默认就是「…」我们希望他能换行表示，这样就需要根据内容调整titleView的高度啦。直接贴sample代码，高度和宽度可以根据自己的需要调整。

UILabel Sample code

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CGRect frame = CGRectMake(20, 0, 280,44); CGSize labelsize = [titleLabel.text sizeWithFont:[UIFont boldSystemFontOfSize: 16.0f]                    constrainedToSize:CGSizeMake(320, 44)                        lineBreakMode:UILineBreakModeTailTruncation]; frame.size.width = labelsize.width; frame.size.height = labelsize.height; titleLabel.frame = frame;

UITextView Sample code

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CGRect frame = noteTextView.frame; CGSize size = [noteTextView.text sizeWithFont:noteTextView.font                         constrainedToSize:CGSizeMake(280, 1000)                             lineBreakMode:UILineBreakModeTailTruncation]; frame.size.height = size.height > 1 ? size.height + 20 : 64; noteTextView.frame = frame;

UITextView是UIScrollView的子类，因此有contentSize属性，也可以按如下实现

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

本文转载至   http://blog.sina.com.cn/s/blog_759d3e120101alji.html

苹果API

UILineBreakMode

Options for wrapping and truncating text. (Deprecated. Use NSLineBreakMode instead.)

typedef enum { 
   UILineBreakModeWordWrap = 0, 
   UILineBreakModeCharacterWrap, 
   UILineBreakModeClip, 
   UILineBreakModeHeadTruncation, 
   UILineBreakModeTailTruncation, 
   UILineBreakModeMiddleTruncation, 
} UILineBreakMode;

NSLineBreakMode

These constants specify what happens when a line is too long for its container.

enum {
   NSLineBreakByWordWrapping = 0,
   NSLineBreakByCharWrapping,
   NSLineBreakByClipping,
   NSLineBreakByTruncatingHead,
   NSLineBreakByTruncatingTail,
   NSLineBreakByTruncatingMiddle
};
typedef NSUInteger NSLineBreakMode

lineBreak模式在6.0之前一直用UILineBreakMode枚举类型，6.0使用NSLineBreakMode枚举类型。枚举值中各个值的意义，解释如下：

   UILineBreakModeWordWrap = 0, 
   以单词为单位换行，以单位为单位截断。 
   UILineBreakModeCharacterWrap, 
   以字符为单位换行，以字符为单位截断。 
   UILineBreakModeClip, 
   以单词为单位换行。以字符为单位截断。 
   UILineBreakModeHeadTruncation, 
   以单词为单位换行。如果是单行，则开始部分有省略号。如果是多行，则中间有省略号，省略号后面有4个字符。 
   UILineBreakModeTailTruncation, 
   以单词为单位换行。无论是单行还是多行，都是末尾有省略号。 
   UILineBreakModeMiddleTruncation, 
   以单词为单位换行。无论是单行还是多行，都是中间有省略号，省略号后面只有2个字符。