UILabel 多行文字自动换行 (自动折行) 1.UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(10, 100, 300, 180)]; 2. UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 100, 300, 150)]; 3. label.text = @"where are you? where are you? where are you? where are you? where are you? where are you? where are you? where are you? where are you? where are you?"; 4. //清空背景颜色 5. label.backgroundColor = [UIColor clearColor]; 6. //设置字体颜色为白色 7. label.textColor = [UIColor whiteColor]; 8. //文字居中显示 9. label.textAlignment = UITextAlignmentCenter; 10. //自动折行设置 11. label.lineBreakMode = UILineBreakModeWordWrap; 12. label.numberOfLines = 0;
在iOS中默认的UILabel中的文字在竖直方向上只能居中对齐,博主参考国外网站,从UILabel继承了一个新类,实现了居上对齐,居中对齐,居下对齐。具体如下:
- //
- // myUILabel.h
- //
- //
- // Created by yexiaozi_007 on 3/4/13.
- // Copyright (c) 2013 yexiaozi_007. All rights reserved.
- //
- #import <UIKit/UIKit.h>
- typedef enum
- {
- VerticalAlignmentTop = 0, // default
- VerticalAlignmentMiddle,
- VerticalAlignmentBottom,
- } VerticalAlignment;
- @interface myUILabel : UILabel
- {
- @private
- VerticalAlignment _verticalAlignment;
- }
- @property (nonatomic) VerticalAlignment verticalAlignment;
- @end
- //
- // myUILabel.m
- //
- //
- // Created by yexiaozi_007 on 3/4/13.
- // Copyright (c) 2013 yexiaozi_007. All rights reserved.
- //
- #import "myUILabel.h"
- @implementation myUILabel
- @synthesize verticalAlignment = verticalAlignment_;
- - (id)initWithFrame:(CGRect)frame {
- if (self = [super initWithFrame:frame]) {
- self.verticalAlignment = VerticalAlignmentMiddle;
- }
- return self;
- }
- - (void)setVerticalAlignment:(VerticalAlignment)verticalAlignment {
- verticalAlignment_ = verticalAlignment;
- [self setNeedsDisplay];
- }
- - (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines {
- CGRect textRect = [super textRectForBounds:bounds limitedToNumberOfLines:numberOfLines];
- switch (self.verticalAlignment) {
- case VerticalAlignmentTop:
- textRect.origin.y = bounds.origin.y;
- break;
- case VerticalAlignmentBottom:
- textRect.origin.y = bounds.origin.y + bounds.size.height - textRect.size.height;
- break;
- case VerticalAlignmentMiddle:
- // Fall through.
- default:
- textRect.origin.y = bounds.origin.y + (bounds.size.height - textRect.size.height) / 2.0;
- }
- return textRect;
- }
- -(void)drawTextInRect:(CGRect)requestedRect {
- CGRect actualRect = [self textRectForBounds:requestedRect limitedToNumberOfLines:self.numberOfLines];
- [super drawTextInRect:actualRect];
- }
- @end
在使用时:
- lbl_mylabel = [[myUILabel alloc] initWithFrame:CGRectMake(20, 50, 150, 600)];
- UIColor *color = [UIColor colorWithPatternImage:[UIImage imageNamed:@"halfTransparent.png"]];//使用半透明图片作为label的背景色
- lbl_mylabel.backgroundColor = color;
- lbl_mylabel.textAlignment = UITextAlignmentLeft;
- lbl_mylabel.textColor = UIColor.whiteColor;
- lbl_mylabel.lineBreakMode = UILineBreakModeWordWrap;
- lbl_mylabel.numberOfLines = 0;
- [lbl_mylabel setVerticalAlignment:VerticalAlignmentTop];
- [self addSubview:lbl_mylabel];
ios UILabel 变量名不能为title
-[UILabel copyWithZone:]: unrecognized selector sent to instance
遇到了这样一个错误,找了半天没找到是什么错误,于是,Google搜索,打开第一个链接http://stackoverflow.com/questions/10784207/uilabel-copywithzone-unrecognized-selector-sent-to-instance
UILabel 设置过长文本中间为省略号
label.lineBreakMode = NSLineBreakByTruncatingMiddle;
http://blog.csdn.net/zhaopenghhhhhh/article/details/16331041
·UILable是iPhone界面最基本的控件,主要用来显示文本信息。 ·常用属性和方法有: 1、创建 CGRect rect = CGRectMake(100, 200, 50, 50); UILabel *label = [[UILabel alloc] initWithFrame:rect]; 2、text //设置和读取文本内容,默认为nil label.text = @”文本信息”; //设置内容 NSLog(@”%@”, label.text); //读取内容 3、textColor //设置文字颜色,默认为黑色 lable.textColor = [UIColor redColor]; 4、font //设置字体大小,默认17 label.font = [UIFont systemFontOfSize:20]; //?一般方法 label.font = [UIFont boldSystemFontOfSize:20]; //加粗方法 label.font = [UIFont fontWithName:@"Arial" size:16]; //指定 字体的方法 //还有?一种从外部导入字体的方法。 5、textAlignment //设置标签文本对齐方式。 label.textAlignment = NSTextAlignmentCenter; //还有 NSTextAlignmentLeft、 NSTextAlignmentRight. 6、numberOfLines //标签最多显示行数,如果为0则表示多行。 label.numberOfLines = 2; 7、enabled //只是决定了Label的绘制方式,将它设置 为NO将会使文本变暗,表示它没有激活,这时向它设置颜色值是无效的。 label.enable = NO; 8、highlighted //是否高亮显示 label.highlighted = YES; label.highlightedTextColor = [UIColor orangeColor]; //高亮 显示时的文本颜色 9、ShadowColor //设置阴影颜色 [label setShadowColor:[UIColor blackColor]]; 10、ShadowOffset //设置阴影偏移量 [label setShadowOffset:CGSizeMake(-1, -1)]; 11、baselineAdjustment //如果adjustsFontSizeToFitWidth属性设 置为YES,这个属性就来控制文本基线的行为。 label.baselineAdjustment = UIBaselineAdjustmentNone; UIBaselineAdjustmentAlignBaselines = 0,默认,文本最上端与中线对齐。 UIBaselineAdjustmentAlignCenters, 文本中线与label中线对齐。 UIBaselineAdjustmentNone, 文本最低端与label中线对齐。 12、Autoshrink //是否自动收缩 Fixed Font Size 默认,如果Label宽度小于文字长度时时,文字大小不自动缩放 minimumScaleFactor 设置最小收缩比例,如果Label宽度小于文字长度时,文字 进行收缩,收缩超过比例后,停止收缩。 minimumFontSize 设置最小收缩字号,如果Label宽度小于文字长度时,文字字号 减小,低于设定字号后,不再减小。//6.0以后不再使用了。 label.minimumScaleFactor = 0.5; 13、adjustsLetterSpacingToFitWidth //改变字母之间的间距来适应Label大小 myLabel.adjustsLetterSpacingToFitWidth = NO; 14、 lineBreakMode //设置文字过长时的显示格式 label.lineBreakMode = NSLineBreakByCharWrapping;以字符为显示单位显 示,后面部分省略不显示。 label.lineBreakMode = NSLineBreakByClipping;剪切与文本宽度相同的内 容长度,后半部分被删除。 label.lineBreakMode = NSLineBreakByTruncatingHead;前面部分文字 以……方式省略,显示尾部文字内容。 label.lineBreakMode = NSLineBreakByTruncatingMiddle;中间的内容 以……方式省略,显示头尾的文字内容。 label.lineBreakMode = NSLineBreakByTruncatingTail;结尾部分的内容 以……方式省略,显示头的文字内容。 label.lineBreakMode = NSLineBreakByWordWrapping;以单词为显示单位显 示,后面部分省略不显示。 15、 adjustsFontSizeToFitWidth //设置字体大小适应label宽度 label.adjustsFontSizeToFitWidth = YES; 16、attributedText:设置标签属性文本。 NSString *text = @"first"; NSMutableAttributedString *textLabelStr = [[NSMutableAttributedString alloc] initWithString:text]; [textLabelStr setAttributes:@{NSForegroundColorAttributeName : [UIColor lightGrayColor], NSFontAttributeName : [UIFont systemFontOfSize:17]} range:NSMakeRange(11, 10)]; label.attributedText = textLabelStr; 17、竖排文字显示每个文字加一个换行符,这是最方便和简单的实现方式。 label.text = @"请\n竖\n直\n方\n向\n排\n列"; label.numberOfLines = [label.text length]; 18、计算UIlabel 随字体多行后的高度 CGRect bounds = CGRectMake(0, 0, 200, 300); heightLabel = [myLabel textRectForBounds:bounds limitedToNumberOfLines:20]; //计算20行后的Label的Frame NSLog(@"%f",heightLabel.size.height); 19、UILabel根据字数多少自动实现适应高度 UILabel *msgLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 45, 0, 0)]; msgLabel.backgroundColor = [UIColor lightTextColor]; [msgLabel setNumberOfLines:0]; msgLabel.lineBreakMode = UILineBreakModeWordWrap; msgLabel.font = [UIFont fontWithName:@"Arial" size:12]; CGSize size = CGSizeMake(290, 1000); msgLabel.text = @"获取到的deviceToken,我们可以通过webservice服务提 交给.net应用程序,这里我简单处理,直接打印出来,拷贝到.net应用环境中使 用。"; CGSize msgSie = [msgLabel.text sizeWithFont:fonts constrainedToSize:size]; [msgLabel setFrame:CGRectMake(15, 45, 290, msgSie.height)]; 20、渐变字体Label UIColor *titleColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"btn.png"]]; NSString *title = @"Setting"; UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 80, 44)]; titleLabel.textColor = titleColor; titleLabel.text = title; titleLabel.font = [UIFont boldSystemFontOfSize:20]; titleLabel.backgroundColor = [UIColor clearColor]; [self.view addSubview:titleLabel]; [titleLabel release]; 21、Label添加边框 titleLabel.layer.borderColor = [[UIColor grayColor] CGColor]; titleLabel.layer.borderWidth = 2;
时间: 2024-10-05 20:56:10