uilabel 和uitextview 自适应大小

 

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

分类： ios 2013-05-21 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

不少时候都须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「…」咱们但愿他能换行表示，这样就须要根据内容调整titleView的高度啦。直接贴sample代码，高度和宽度能够根据本身的须要调整。

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，所以有contentSize属性，也能够按以下实现

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

 

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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以前一直用UILineBreakMode枚举类型，6.0使用NSLineBreakMode枚举类型。枚举值中各个值的意义，解释以下：

   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。若是是单行，则开始部分有省略号。若是是多行，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。不管是单行仍是多行，都是末尾有省略号。 
   UILineBreakModeMiddleTruncation, 
   以单词为单位换行。不管是单行仍是多行，都是中间有省略号，省略号后面只有2个字符。