首页 > 代码库 > label显示不同的字体颜色
label显示不同的字体颜色
问题描述：在一个控件label中，添加两种不同颜色和字体的文字，并且加上点击事件
直接上代码：
需要加上CoreText库文件
//
// MutableLabel.h
// MyLabelDemo
//
// Created by xwg on 14-7-15.
// Copyright (c) 2014年 希望谷. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface MutableLabel : UILabel
{
NSMutableAttributedString *attributedString;
UIControl *_textActionView;
UIControl *_titleActionView;
UIControl *_mutableLineActionView;
UIColor *_hightlightedColor;
NSString *_ktext;
NSString *_ktitle;
UIFont *_textFont;
}
/*
说明：先设置text再设置title
*/
@property(nonatomic, assign)NSUInteger nameTag;
@property(nonatomic, assign)NSUInteger textTag;
//为内容添加文字
-(void)setTitle:(NSString *)title withFont:(UIFont *)titleFont titleColor:(UIColor *)titleColor andText:(NSString *)text andTextFont:(UIFont *)textFont andTextColor:(UIColor *)textColor;
-(void)setText:(NSString *)text withFont:(UIFont *)font andColor:(UIColor *)color;
//为姓名添加文字
-(void)setTitle:(NSString *)title withFont:(UIFont *)font andColor:(UIColor *)color;
//为内容添加点击事件
-(void)addTargetToText:(id)target action:(SEL)action;
//为姓名添加点击事件
-(void)addTargetToTitle:(id)target action:(SEL)action;
@end
实现文件
//
// MutableLabel.m
// MyLabelDemo
//
// Created by xwg on 14-7-15.
// Copyright (c) 2014年 希望谷. All rights reserved.
//
#import "MutableLabel.h"
#import <CoreText/CoreText.h>
@implementation MutableLabel
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
attributedString = [[NSMutableAttributedString alloc]init];
}
return self;
}
-(void)setTitle:(NSString *)title withFont:(UIFont *)titleFont titleColor:(UIColor *)titleColor andText:(NSString *)text andTextFont:(UIFont *)textFont andTextColor:(UIColor *)textColor
{
self.text = [NSString stringWithFormat:@"%@: %@",title,text];
_ktext = [text copy];
_textFont = [textFont retain];
NSUInteger len = [self.text length];
NSRange textRange = NSMakeRange(0, len);
//带有属性的字符串
NSMutableAttributedString *mutaString = [[NSMutableAttributedString alloc]initWithString:self.text];
[mutaString addAttribute:(NSString *)(kCTForegroundColorAttributeName) value:(id)textColor.CGColor range:textRange];//添加字体颜色属性
CTFontRef ctfont = CTFontCreateWithName((__bridge CFStringRef)textFont.fontName, textFont.pointSize, NULL);
[mutaString addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)ctfont range:textRange];
CFRelease(ctfont);
_ktitle = [title copy];
NSUInteger len1 = [title length]+1;
NSRange titleRang = NSMakeRange(0, len1);
[mutaString addAttribute:NSForegroundColorAttributeName value:titleColor range:titleRang];
[mutaString addAttribute:NSFontAttributeName value:titleFont range:titleRang];
attributedString = mutaString;
NSMutableParagraphStyle *ps = [[NSMutableParagraphStyle alloc] init];
[ps setLineBreakMode:NSLineBreakByCharWrapping];
[attributedString addAttribute:NSParagraphStyleAttributeName value:ps range:textRange];
[ps release];
}
-(void)setText:(NSString *)text withFont:(UIFont *)font andColor:(UIColor *)color
{
self.text = text;
_ktext = [text copy];
_textFont = [font retain];
NSUInteger len = [text length];
NSRange textRange = NSMakeRange(0, len);
//带有属性的字符串
NSMutableAttributedString *mutaString = [[NSMutableAttributedString alloc]initWithString:text];
[mutaString addAttribute:(NSString *)(kCTForegroundColorAttributeName) value:(id)color.CGColor range:textRange];//添加字体颜色属性
CTFontRef ctfont = CTFontCreateWithName((__bridge CFStringRef)font.fontName, font.pointSize, NULL);
[mutaString addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)ctfont range:textRange];
CFRelease(ctfont);
attributedString = mutaString;
}
-(void)setTitle:(NSString *)title withFont:(UIFont *)font andColor:(UIColor *)color
{
_ktitle = [title copy];
NSString *text = [NSString stringWithFormat:@"%@%@",title,self.text];
self.text = text;
NSUInteger len = [title length];
NSRange titleRang = NSMakeRange(0, len);
NSMutableAttributedString *titleString = [[NSMutableAttributedString alloc]initWithString:title];
[attributedString insertAttributedString:titleString atIndex:0];
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:titleRang];
// [titleString addAttribute:(NSString *)(kCTForegroundColorAttributeName) value:(id)color.CGColor range:titleRang];
//
// CTFontRef ctfont = CTFontCreateWithName((__bridge CFStringRef)font.fontName, font.pointSize, NULL);
// [titleString addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)ctfont range:titleRang];
// CFRelease(ctfont);
// [attributedString insertAttributedString:titleString atIndex:0];
[titleString release];
//添加点击事件
[self setUserInteractionEnabled:YES];
NSDictionary *attributeDict = [NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil];
CGSize titleSize = [_ktitle sizeWithAttributes:attributeDict];
_titleActionView = [[UIControl alloc]initWithFrame:CGRectMake(0, 0, titleSize.width, titleSize.height)];
[_titleActionView setBackgroundColor:[UIColor clearColor]];
[self addSubview:_titleActionView];
[self sendSubviewToBack:_titleActionView];
NSDictionary *attributeDict1 = [NSDictionary dictionaryWithObjectsAndKeys:_textFont,NSFontAttributeName, nil];
CGSize textSize = [_ktext sizeWithAttributes:attributeDict1];
_textActionView = [[UIControl alloc]initWithFrame:CGRectMake(textSize.width, 0, self.bounds.size.width - textSize.width, textSize.height)];
[_textActionView setBackgroundColor:[UIColor clearColor]];
[self addSubview:_textActionView];
[self sendSubviewToBack:_textActionView];
if(titleSize.width+textSize.width > self.bounds.size.width)
{
//折行
_mutableLineActionView = [[UIControl alloc]initWithFrame:CGRectMake(0, titleSize.height, self.bounds.size.width, self.bounds.size.height-titleSize.height)];
[_mutableLineActionView setBackgroundColor:[UIColor clearColor]];
[self addSubview:_mutableLineActionView];
[self sendSubviewToBack:_mutableLineActionView];
}
}
-(void)addTargetToText:(id)target action:(SEL)action
{
[_textActionView addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
if(_mutableLineActionView != nil)
{
[_mutableLineActionView addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
}
}
-(void)addTargetToTitle:(id)target action:(SEL)action
{
[_titleActionView addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
}
-(void)drawRect:(CGRect)rect
{
if (self.text !=nil)
{
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
CGContextTranslateCTM(context, 0.0, 0.0);//move
CGContextScaleCTM(context, 1.0, -1.0);
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attributedString);
CGMutablePathRef pathRef = http://www.mamicode.com/CGPathCreateMutable();
CGPathAddRect(pathRef,NULL , CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height));//const CGAffineTransform *m
CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), pathRef,NULL );//CFDictionaryRef frameAttributes
CGContextTranslateCTM(context, 0, -self.bounds.size.height);
CGContextSetTextPosition(context, 0, 0);
CTFrameDraw(frame, context);
CGContextRestoreGState(context);
CGPathRelease(pathRef);
CFRelease(framesetter);
UIGraphicsPushContext(context);
}
}
- (void)dealloc
{
[_titleActionView release]; _titleActionView = nil;
[_textActionView release]; _textActionView = nil;
if(_mutableLineActionView != nil){[_mutableLineActionView release]; _mutableLineActionView = nil;}
[attributedString release];
[super dealloc];
}
@end
测试用例：
- (void)viewDidLoad
{
[super viewDidLoad];
MutableLabel *label = [[MutableLabel alloc]initWithFrame:CGRectMake(0, 50, 300, 100)];
[self.view addSubview:label];
NSString *str = @"575757755575757575858575757556655656655656576556151445455411561";
[label setTitle:@"阎晓薇" withFont:[UIFont systemFontOfSize:16] titleColor:[UIColor redColor] andText:str andTextFont:[UIFont systemFontOfSize:16] andTextColor:[UIColor blackColor]];
// label.numberOfLines = 0;
label.lineBreakMode = NSLineBreakByCharWrapping;
// [label setText:str withFont:[UIFont systemFontOfSize:14] andColor:[UIColor blackColor]];
// [label setTitle:@"阎晓薇" withFont:[UIFont systemFontOfSize:14] andColor:[UIColor redColor]];
[label addTargetToTitle:self action:@selector(titleClicked)];
[label addTargetToText:self action:@selector(textClicked)];
[label release];
}
-(void)titleClicked
{
NSLog(@"titleClicked");
}
-(void)textClicked
{
NSLog(@"textClicked");
}
两种实现方式，代码有点累赘