iOS开发 - 第05篇 - 项目 - 12 - 图文混排

1、首页微博文字处理

对于之前微博项目中首页：微博文字中的用户名、话题、链接等文字须要高亮显示。表情字符串须要显示相应表情。

思路：

1>之前微博中的文字使用NSString，要达到不同文字的高亮显示，须要使用NSAttributedString

2>微博模型中添加一个属性。代表属性字符串

/** string     微博信息内容*/

@property(nonatomic, copy) NSString *text;

/** string     微博信息内容 -- 带有属性的(特殊文字会高亮显示\显示表情)*/

@property(nonatomic, copy) NSAttributedString *attributedText;

3> 重写text的setter方法，仅仅要外面传进来text，就在里面算出带属性的文字attributedText

4>在HWStatusCell的setStatusFrame:方法中

self.contentLabel.attributedText = status.attributedText;

关键：利用text算出attributedText！

！！

2、正則表達式

正則表達式作用：

1.推断字符串是否符合某个特定规则

* 推断某个字符串是否为QQ号码\电话号码\邮箱

2.截取字符串中符合某个特定规则的内容

* 截取@"#呵呵呵#[偷笑]5345http://foo.com/blah_blah #解放军# 58937985"的全部话题\表情\链接

关于正則表達式的规则使用方法可參考：点击打开链接

1> 正則表達式的基本使用： 

    /**
     使用正則表達式的步骤:
     1.创建一个正則表達式对象:定义规则

     2.利用正則表達式对象 来測试 相应的字符串
     */

    // Pattern : 样式\规则
    // NSString *pattern = @"ab7";
    // [] : 找到内部的某一个字符就可以
    // NSString *pattern = @"[0123456789]";
    // NSString *pattern = @"[0-9]";
    // NSString *pattern = @"[a-zA-Z0-9]";
    // NSString *pattern = @"[0-9][0-9]";
    // NSString *pattern = @"\\d\\d\\d";
    // NSString *pattern = @"\\d{2,4}";
    // ?

+ *
    // ? : 0个或者1个
    // + : 至少1个
    // * : 0个或者多个

    NSString *username = @"6gjkhdjkhgkjh7";

    // 1.创建正則表達式
    NSString *pattern = @"^\\d.*\\d$";
    NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:pattern options:0 error:nil];

    // 2.測试字符串
    NSArray *results = [regex matchesInString:username options:0 range:NSMakeRange(0, username.length)];

    NSLog(@"%zd", results.count);

2> 利用正則表達式找出微博文字中的keyword

    NSString *str = @"#呵呵呵#[偷笑] http://foo.com/blah_blah #解放军#//http://foo.com/blah_blah
            @Ring花椰菜:就#范德萨发生的#舍不得打[test] 就惯#急急急#着他吧[挖鼻屎]//@崔西狮:小拳头举起又放下了
            说点啥好呢…… //@toto97:@崔西狮 蹦米咋不揍他#哈哈哈# http://foo.com/blah_blah";

    // 创建规则
    // 表情的规则
    NSString *emotionPattern = @"\\[[0-9a-zA-Z\\u4e00-\\u9fa5]+\\]";

    // @的规则
    NSString *atPattern = @"@[0-9a-zA-Z\\u4e00-\\u9fa5]+";

    // #话题#的规则
    NSString *topicPattern = @"#[0-9a-zA-Z\\u4e00-\\u9fa5]+#";

    // url链接的规则
    NSString *urlPattern = @"\\b(([\\w-]+://?

|www[.])[^\\s()<>]+(?:\\([\\w\\d]+\\)|([^[:punct:]\\s]|/)))";

    // | 匹配多个条件,相当于or\或
    NSString *pattern = [NSString stringWithFormat:@"%@|%@|%@|%@", emotionPattern, atPattern, topicPattern, urlPattern];

    // 1.创建正則表達式
    NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:pattern options:0 error:nil];
    // 2.測试字符串
    NSArray *results = [regex matchesInString:str options:0 range:NSMakeRange(0, str.length)];

    // 3.遍历结果
    for (NSTextCheckingResult *result in results) {
        NSLog(@"%@ %@", NSStringFromRange(result.range), [str substringWithRange:result.range]);
    }

3> 使用第三方框架RegexKitLite

注1：该框架为非ARC，使用-fno-objc-arc

注2：加入libicucor.dylib

NSString *str = @"#呵呵呵#[偷笑] http://foo.com/blah_blah #解放军#//http://foo.com/blah_blah
            @Ring花椰菜:就#范德萨发生的#舍不得打[test] 就惯#急急急#着他吧[挖鼻屎]//@崔西狮:小拳头举起又放下了
            说点啥好呢…… //@toto97:@崔西狮 蹦米咋不揍他#哈哈哈# http://foo.com/blah_blah";

// 表情的规则
NSString *emotionPattern = @"\\[[0-9a-zA-Z\\u4e00-\\u9fa5]+\\]";
// @的规则
NSString *atPattern = @"@[0-9a-zA-Z\\u4e00-\\u9fa5]+";
// #话题#的规则
NSString *topicPattern = @"#[0-9a-zA-Z\\u4e00-\\u9fa5]+#";
// url链接的规则
NSString *urlPattern = @"\\b(([\\w-]+://?|www[.])[^\\s()<>]+(?:\\([\\w\\d]+\\)|([^[:punct:]\\s]|/)))";
NSString *pattern = [NSString stringWithFormat:@"%@|%@|%@|%@", emotionPattern, atPattern, topicPattern, urlPattern];
// NSArray *cmps = [str componentsMatchedByRegex:pattern];

// 遍历全部的匹配结果
[str enumerateStringsMatchedByRegex:pattern usingBlock:^(NSInteger captureCount, NSString *const
        __unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
    NSLog(@"%@ %@", *capturedStrings, NSStringFromRange(*capturedRanges));
}];

// 以正則表達式为分隔符，找出全部非keyword
[str enumerateStringsSeparatedByRegex:pattern usingBlock:^(NSInteger captureCount, NSString *const
        __unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
    NSLog(@"%@ %@", *capturedStrings, NSStringFromRange(*capturedRanges));
}];

3、微博文字图文混排

3.1 keyword高亮显示

1>重写HWStatus中text的setter方法

2>转发微博文字处理

注：转发微博是由转发微博用户名和转发微博位子组成，用户名也要处理

微博模型加入转发微博文字属性

/** 被转发的原微博信息字段，当该微博为转发微博时返回 */

@property(nonatomic, strong) HWStatus *retweeted_status;

/** 被转发的原微博信息内容 -- 带有属性的(特殊文字会高亮显示\显示表情)*/

@property(nonatomic, copy) NSAttributedString *retweetedAttributedText;

重写HWStatus中retweeted_status的setter方法。算出retweetedAttributedText

3.2 文字中的表情

注意点：

注1：对于attributedText的字体设置，不能直接使用label.font来设置，这样无效。必须使用addAttribute：

[attributedTextaddAttribute:NSFontAttributeName value:font range:…];

注2：不能使用insertAttributeString: atIndex:或者replaceAttributeString:两个方法，由于一旦前面的文字替换成表情。[微笑]有四个字符，微笑表情仅仅有一个字符会导致后面的index都变掉，不能正确插入或者替换！

！！

注3：将微博打散，文字和表情分别取出来，再进行拼接！

！！

注4：每个打散碎片文字都有一个文字和一个范围，加入一个HWTextPart模型，将微博文字遍历后存放到模型数组中

注5：对数组中的模型进行排序，再进行拼接，设置表情、文字、keyword等

注6：依据表情文字找到相应的表情图片。使用之前的HWEmotionTool，加入寻找方法

1> HWTextPart

#import <Foundation/Foundation.h>

@interface HWTextPart : NSObject
/** 这段文字的内容 */
@property (nonatomic, copy) NSString *text;
/** 这段文字的范围 */
@property (nonatomic, assign) NSRange range;
/** 是否为特殊文字 */
@property (nonatomic, assign, getter = isSpecical) BOOL special;
/** 是否为表情 */
@property (nonatomic, assign, getter = isEmotion) BOOL emotion;
@end

2> HWEmotionTool

#import <Foundation/Foundation.h>
@class HWEmotion;

@interface HWEmotionTool : NSObject
+ (void)addRecentEmotion:(HWEmotion *)emotion;
+ (NSArray *)recentEmotions;
+ (NSArray *)defaultEmotions;
+ (NSArray *)lxhEmotions;
+ (NSArray *)emojiEmotions;

/**
 *  通过表情描写叙述找到相应的表情
 *
 *  @param chs 表情描写叙述
 */
+ (HWEmotion *)emotionWithChs:(NSString *)chs;

@end

// 近期表情的存储路径
#define HWRecentEmotionsPath [[NSSearchPathForDirectoriesInDomains
    (NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"emotions.archive"]

#import "HWEmotionTool.h"
#import "HWEmotion.h"
#import "MJExtension.h"

@implementation HWEmotionTool

static NSMutableArray *_recentEmotions;

+ (void)initialize
{
    _recentEmotions = [NSKeyedUnarchiver unarchiveObjectWithFile:HWRecentEmotionsPath];
    if (_recentEmotions == nil) {
        _recentEmotions = [NSMutableArray array];
    }
}

+ (HWEmotion *)emotionWithChs:(NSString *)chs
{
    NSArray *defaults = [self defaultEmotions];
    for (HWEmotion *emotion in defaults) {
        if ([emotion.chs isEqualToString:chs]) return emotion;
    }

    NSArray *lxhs = [self lxhEmotions];
    for (HWEmotion *emotion in lxhs) {
        if ([emotion.chs isEqualToString:chs]) return emotion;
    }

    return nil;
}

+ (void)addRecentEmotion:(HWEmotion *)emotion
{
    // 删除反复的表情
    [_recentEmotions removeObject:emotion];

    // 将表情放到数组的最前面
    [_recentEmotions insertObject:emotion atIndex:0];

    // 将全部的表情数据写入沙盒
    [NSKeyedArchiver archiveRootObject:_recentEmotions toFile:HWRecentEmotionsPath];
}

/**
 *  返回装着HWEmotion模型的数组
 */
+ (NSArray *)recentEmotions
{
    return _recentEmotions;
}

static NSArray *_emojiEmotions, *_defaultEmotions, *_lxhEmotions;
+ (NSArray *)emojiEmotions
{
    if (!_emojiEmotions) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"EmotionIcons/emoji/info.plist" ofType:nil];
        _emojiEmotions = [HWEmotion objectArrayWithKeyValuesArray:[NSArray arrayWithContentsOfFile:path]];
    }
    return _emojiEmotions;
}

+ (NSArray *)defaultEmotions
{
    if (!_defaultEmotions) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"EmotionIcons/default/info.plist" ofType:nil];
        _defaultEmotions = [HWEmotion objectArrayWithKeyValuesArray:[NSArray arrayWithContentsOfFile:path]];
    }
    return _defaultEmotions;
}

+ (NSArray *)lxhEmotions
{
    if (!_lxhEmotions) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"EmotionIcons/lxh/info.plist" ofType:nil];
        _lxhEmotions = [HWEmotion objectArrayWithKeyValuesArray:[NSArray arrayWithContentsOfFile:path]];
    }
    return _lxhEmotions;
}
@end

3> HWStatus

#import "HWStatus.h"
#import "MJExtension.h"
#import "HWPhoto.h"
#import "HWUser.h"
#import "HWTextPart.h"
#import "RegexKitLite.h"
#import "HWEmotion.h"
#import "HWEmotionTool.h"

@implementation HWStatus
- (NSDictionary *)objectClassInArray
{
    return @{@"pic_urls" : [HWPhoto class]};
}

/**
 *  普通文字 --> 属性文字
 *
 *  @param text 普通文字
 *
 *  @return 属性文字
 */
- (NSAttributedString *)attributedTextWithText:(NSString *)text
{
    NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] init];

    // 表情的规则
    NSString *emotionPattern = @"\\[[0-9a-zA-Z\\u4e00-\\u9fa5]+\\]";
    // @的规则
    NSString *atPattern = @"@[0-9a-zA-Z\\u4e00-\\u9fa5-_]+";
    // #话题#的规则
    NSString *topicPattern = @"#[0-9a-zA-Z\\u4e00-\\u9fa5]+#";
    // url链接的规则
    NSString *urlPattern = @"\\b(([\\w-]+://?

|www[.])[^\\s()<>]+(?:\\([\\w\\d]+\\)|([^[:punct:]\\s]|/)))";
    NSString *pattern = [NSString stringWithFormat:@"%@|%@|%@|%@", emotionPattern, atPattern, topicPattern, urlPattern];

    // 遍历全部的特殊字符串
    NSMutableArray *parts = [NSMutableArray array];
    [text enumerateStringsMatchedByRegex:pattern usingBlock:^(NSInteger captureCount, NSString *const
                __unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
        if ((*capturedRanges).length == 0) return;

        HWTextPart *part = [[HWTextPart alloc] init];
        part.special = YES;
        part.text = *capturedStrings;
        part.emotion = [part.text hasPrefix:@"["] && [part.text hasSuffix:@"]"];
        part.range = *capturedRanges;
        [parts addObject:part];
    }];
    // 遍历全部的非特殊字符
    [text enumerateStringsSeparatedByRegex:pattern usingBlock:^(NSInteger captureCount, NSString *const
                __unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
        if ((*capturedRanges).length == 0) return;

        HWTextPart *part = [[HWTextPart alloc] init];
        part.text = *capturedStrings;
        part.range = *capturedRanges;
        [parts addObject:part];
    }];

    // 排序
    // 系统是依照从小 -> 大的顺序排列对象
    [parts sortUsingComparator:^NSComparisonResult(HWTextPart *part1, HWTextPart *part2) {
        // NSOrderedAscending = -1L, NSOrderedSame, NSOrderedDescending
        // 返回NSOrderedSame:两个一样大
        // NSOrderedAscending(升序):part2>part1
        // NSOrderedDescending(降序):part1>part2
        if (part1.range.location > part2.range.location) {
            // part1>part2
            // part1放后面, part2放前面
            return NSOrderedDescending;
        }
        // part1<part2
        // part1放前面, part2放后面
        return NSOrderedAscending;
    }];

    UIFont *font = [UIFont systemFontOfSize:15];
    // 按顺序拼接每一段文字
    for (HWTextPart *part in parts) {
        // 等会须要拼接的子串
        NSAttributedString *substr = nil;
        if (part.isEmotion) { // 表情
            NSTextAttachment *attch = [[NSTextAttachment alloc] init];
            NSString *name = [HWEmotionTool emotionWithChs:part.text].png;
            if (name) { // 能找到相应的图片
                attch.image = [UIImage imageNamed:name];
                attch.bounds = CGRectMake(0, -3, font.lineHeight, font.lineHeight);
                substr = [NSAttributedString attributedStringWithAttachment:attch];
            } else { // 表情图片不存在
                substr = [[NSAttributedString alloc] initWithString:part.text];
            }
        } else if (part.special) { // 非表情的特殊文字
           substr = [[NSAttributedString alloc] initWithString:part.text
                        attributes:@{ NSForegroundColorAttributeName : [UIColor redColor] }];
        } else { // 非特殊文字
            substr = [[NSAttributedString alloc] initWithString:part.text];
        }
        [attributedText appendAttributedString:substr];
    }

    // 一定要设置字体,保证计算出来的尺寸是正确的
    [attributedText addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, attributedText.length)];

    return attributedText;
}

- (void)setText:(NSString *)text
{
    _text = [text copy];

    // 利用text生成attributedText
    self.attributedText = [self attributedTextWithText:text];
}

- (void)setRetweeted_status:(HWStatus *)retweeted_status
{
    _retweeted_status = retweeted_status;

     NSString *retweetContent = [NSString stringWithFormat:@"@%@ : %@", retweeted_status.user.name, retweeted_status.text];
    self.retweetedAttributedText = [self attributedTextWithText:retweetContent];
}

4、监听点击

4.1 自己定义HWStatusTextView

实现：对keyword点击实现高亮显示

关键：首先推断手指是否在keyword上，其次算出keyword的范围，最后设置高亮背景！

！！

注1：利用UILabel不能依据文字找出文字相应的尺寸范围。利用UITextView能够实现，自己定义HWStatusTextView。

注2：textView默认会有内边距，须要取消

注3：

self.editable = NO;

self.textContainerInset =UIEdgeInsetsMake(0, -5, 0, -5);

//
禁止滚动,让文字全然显示出来

self.scrollEnabled = NO;

4.2 HWStatusTextView点击

注1：找出keyword在textView的范围。能够使用textView的selectedRange属性。再通过selectionRectsForRange:方法！！！

注2：找出keyword的range，自己定义HWSpecial模型

#import <Foundation/Foundation.h>

@interface HWSpecial : NSObject
/** 这段特殊文字的内容 */
@property (nonatomic, copy) NSString *text;
/** 这段特殊文字的范围 */
@property (nonatomic, assign) NSRange range;
@end

注3：在HWStatus中拼接字符串时。计算每个字符串中的特殊文字，将HWSpecial模型数组绑定到attributedText中。就能够在textView中依据Key取出特殊字符串。！！

UIFont *font = [UIFont systemFontOfSize:15];
NSMutableArray *specials = [NSMutableArray array];
// 按顺序拼接每一段文字
for (HWTextPart *part in parts) {
    // 等会须要拼接的子串
    NSAttributedString *substr = nil;
    if (part.isEmotion) { // 表情
        NSTextAttachment *attch = [[NSTextAttachment alloc] init];
        NSString *name = [HWEmotionTool emotionWithChs:part.text].png;
        if (name) { // 能找到相应的图片
            attch.image = [UIImage imageNamed:name];
            attch.bounds = CGRectMake(0, -3, font.lineHeight, font.lineHeight);
            substr = [NSAttributedString attributedStringWithAttachment:attch];
        } else { // 表情图片不存在
            substr = [[NSAttributedString alloc] initWithString:part.text];
        }
    } else if (part.special) { // 非表情的特殊文字
       substr = [[NSAttributedString alloc] initWithString:part.text attributes:@{
                                                                          NSForegroundColorAttributeName : [UIColor redColor]
                                                                          }];

        // 创建特殊对象
        HWSpecial *s = [[HWSpecial alloc] init];
        s.text = part.text;
        NSUInteger loc = attributedText.length;
        NSUInteger len = part.text.length;
        s.range = NSMakeRange(loc, len);
        [specials addObject:s];
    } else { // 非特殊文字
        substr = [[NSAttributedString alloc] initWithString:part.text];
    }
    [attributedText appendAttributedString:substr];
}

// 一定要设置字体,保证计算出来的尺寸是正确的
[attributedText addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, attributedText.length)];
[attributedText addAttribute:@"specials" value:specials range:NSMakeRange(0, 1)];

注4：HWStatusTextView中处理例如以下：

#import "HWStatusTextView.h"
#import "HWSpecial.h"

#define HWStatusTextViewCoverTag 999

@implementation HWStatusTextView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor clearColor];
        self.editable = NO;
        self.textContainerInset = UIEdgeInsetsMake(0, -5, 0, -5);
        // 禁止滚动, 让文字全然显示出来
        self.scrollEnabled = NO;
    }
    return self;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 触摸对象
    UITouch *touch = [touches anyObject];

    // 触摸点
    CGPoint point = [touch locationInView:self];

    NSArray *specials = [self.attributedText attribute:@"specials" atIndex:0 effectiveRange:NULL];
    BOOL contains = NO;

    for (HWSpecial *special in specials) {
        self.selectedRange = special.range;
        // self.selectedRange --影响--> self.selectedTextRange
        // 获得选中范围的矩形框
        NSArray *rects = [self selectionRectsForRange:self.selectedTextRange];
        // 清空选中范围
        self.selectedRange = NSMakeRange(0, 0);

        for (UITextSelectionRect *selectionRect in rects) {
            CGRect rect = selectionRect.rect;
            if (rect.size.width == 0 || rect.size.height == 0) continue;

            if (CGRectContainsPoint(rect, point)) { // 点中了某个特殊字符串
                contains = YES;
                break;
            }
        }

        if (contains) {
            for (UITextSelectionRect *selectionRect in rects) {
                CGRect rect = selectionRect.rect;
                if (rect.size.width == 0 || rect.size.height == 0) continue;

                UIView *cover = [[UIView alloc] init];
                cover.backgroundColor = [UIColor greenColor];
                cover.frame = rect;
                cover.tag = HWStatusTextViewCoverTag;
                cover.layer.cornerRadius = 5;
                [self insertSubview:cover atIndex:0];
            }

            break;
        }
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [self touchesCancelled:touches withEvent:event];
    });
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 去掉特殊字符串后面的高亮背景
    for (UIView *child in self.subviews) {
        if (child.tag == HWStatusTextViewCoverTag) [child removeFromSuperview];
    }
}
@end

5、代码重构

/**
 * 获取特殊字符串rect数组
 */
- (void)setupSpecialRects
{
    NSArray *specials = [self.attributedText attribute:@"specials" atIndex:0 effectiveRange:NULL];
    for (HWSpecial *special in specials) {
        self.selectedRange = special.range;
        // self.selectedRange --影响--> self.selectedTextRange
        // 获得选中范围的矩形框
        NSArray *selectionRects = [self selectionRectsForRange:self.selectedTextRange];
        // 清空选中范围
        self.selectedRange = NSMakeRange(0, 0);

        NSMutableArray *rects = [NSMutableArray array];
        for (UITextSelectionRect *selectionRect in selectionRects) {
            CGRect rect = selectionRect.rect;
            if (rect.size.width == 0 || rect.size.height == 0) continue;

            // 加入rect
            [rects addObject:[NSValue valueWithCGRect:rect]];
        }
        special.rects = rects;
    }
}

/**
 * 找出被触摸的特殊字符串
 */
- (HWSpecial *)touchingSpecialWithPoint:(CGPoint)point
{
    NSArray *specials = [self.attributedText attribute:@"specials" atIndex:0 effectiveRange:NULL];
    for (HWSpecial *special in specials) {
        for (NSValue *rectValue in special.rects) {
            if (CGRectContainsPoint(rectValue.CGRectValue, point)) { // 点中了某个特殊字符串
                return special;
            }
        }
    }
    return nil;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 触摸对象
    UITouch *touch = [touches anyObject];

    // 触摸点
    CGPoint point = [touch locationInView:self];

    // 初始化矩形框
    [self setupSpecialRects];

    // 依据触摸点获得被触摸的特殊字符串
    HWSpecial *special = [self touchingSpecialWithPoint:point];

    // 在被触摸的特殊字符串后面显示一段高亮的背景
    for (NSValue *rectValue in special.rects) {
        // 在被触摸的特殊字符串后面显示一段高亮的背景
        UIView *cover = [[UIView alloc] init];
        cover.backgroundColor = [UIColor greenColor];
        cover.frame = rectValue.CGRectValue;
        cover.tag = HWStatusTextViewCoverTag;
        cover.layer.cornerRadius = 5;
        [self insertSubview:cover atIndex:0];
    }
}

6、事件处理

注：上述做法。textView拦截了全部的触摸事件。即点击了textView，事件不会交给cell去处理，实际应用中，点击cell，还须要跳转微博详情，即交给cell去处理cell点击事件，因此须要改动textView的事件处理，再点击keyword的时候交给textView处理。其余情况下交给cell去处理！

！

。

触摸事件的处理

1.推断触摸点在谁身上:调用全部UI控件的-(BOOL)pointInside:(CGPoint)point
withEvent:(UIEvent *)event

2.pointInside返回YES的控件就是触摸点所在的UI控件

3.由触摸点所在的UI控件选出处理事件的UI控件:调用-
(UIView*)hitTest:(CGPoint)point withEvent:(UIEvent *)event

//- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
//{
//    return [super hitTest:point withEvent:event];
//}

/**
 * 告诉系统:触摸点point是否在这个UI控件身上
 */
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    // 初始化矩形框
    [self setupSpecialRects];

    // 依据触摸点获得被触摸的特殊字符串
    HWSpecial *special = [self touchingSpecialWithPoint:point];

    return special : YES ? NO;
}