自定义Label,设置关键字的颜色

来源：互联网发布：windows10共享设置软件编辑：程序博客网时间：2024/05/15 23:43

下面是一个自定义UILabel ,通过他,可以给Label中的关键字设置颜色

#import <UIKit/UIKit.h>#import <CoreText/CoreText.h>#import <QuartzCore/QuartzCore.h>@interface CustomLabel : UILabel{    NSMutableAttributedString   *_mattString;}//针对某节文字设置单一颜色-(void)setSubTextColorArray:(NSArray*)colorArray subTextPositionRangeArray:(NSArray*)subTextPositionRangeArray;//针对某节文字设置单一颜色-(void)setSubTextColor:(UIColor*)color subTextPositionRangeArray:(NSArray*)subTextPositionRangeArray;// 设置某段字的颜色- (void)setColor:(UIColor *)color fromIndex:(NSInteger)location length:(NSInteger)length;// 设置某段字的字体- (void)setFont:(UIFont *)font fromIndex:(NSInteger)location length:(NSInteger)length;// 设置某段字的风格- (void)setStyle:(CTUnderlineStyle)style fromIndex:(NSInteger)location length:(NSInteger)length;@end

#import "CustomLabel.h"@implementation CustomLabel- (void)dealloc{    [_mattString release];    [super dealloc];}- (id)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        // Initialization code    }    return self;}- (void)drawRect:(CGRect)rect{        if (self.tag==10) {          [super drawRect:rect];    }    else{    CATextLayer *textLayer = [CATextLayer layer];    textLayer.string = _mattString;    textLayer.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);    NSArray* arr=[NSArray arrayWithObject:textLayer];    [self.layer setSublayers:arr];    }}- (void)setText:(NSString *)text{    [super setText:text];    if (text == nil) {        [_mattString release];        _mattString = nil;    }else{        _mattString = [[[[NSMutableAttributedString alloc] initWithString:text]retain] autorelease];    }}//针对某节文字设置单一颜色-(void)setSubTextColorArray:(NSArray*)colorArray subTextPositionRangeArray:(NSArray*)subTextPositionRangeArray{    if ([colorArray count]==[subTextPositionRangeArray count]) {        for (int i=0; i<[colorArray count]; i++) {            NSRange tempRange=((NSValue*)[subTextPositionRangeArray objectAtIndex:i]).rangeValue;            [self setColor:[colorArray objectAtIndex:i] fromIndex:tempRange.location length:tempRange.length];        }    }    else    {        NSLog(@"ERROR:colorArray count!=subTextPositionRangeArray count");    }}//针对某节文字设置单一颜色-(void)setSubTextColor:(UIColor*)color subTextPositionRangeArray:(NSArray*)subTextPositionRangeArray{    for (NSValue* tempVale in subTextPositionRangeArray) {        NSRange tempRange=tempVale.rangeValue;        [self setColor:color fromIndex:tempRange.location length:tempRange.length];    }}// 设置某段字的颜色- (void)setColor:(UIColor *)color fromIndex:(NSInteger)location length:(NSInteger)length{    if (location < 0||location>self.text.length-1||length+location>self.text.length) {        return;    }    [_mattString addAttribute:(NSString *)kCTForegroundColorAttributeName                       value:(id)color.CGColor                       range:NSMakeRange(location, length)];}// 设置某段字的字体- (void)setFont:(UIFont *)font fromIndex:(NSInteger)location length:(NSInteger)length{    if (location < 0||location>self.text.length-1||length+location>self.text.length) {        return;    }    [_mattString addAttribute:(NSString *)kCTFontAttributeName                       value:(id)CTFontCreateWithName((CFStringRef)font.fontName,                                                      font.pointSize,                                                      NULL)                       range:NSMakeRange(location, length)];}// 设置某段字的风格- (void)setStyle:(CTUnderlineStyle)style fromIndex:(NSInteger)location length:(NSInteger)length{    if (location < 0||location>self.text.length-1||length+location>self.text.length) {        return;    }    [_mattString addAttribute:(NSString *)kCTUnderlineStyleAttributeName                       value:(id)[NSNumber numberWithInt:style]                       range:NSMakeRange(location, length)];}