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 = 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

label显示不同的字体颜色,布布扣,bubuko.com

时间： 2024-12-04 17:12:47

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