版本记录

版本号	时间
V1.0	2017.06.08

前言

YYText是一个专门处理文字的框架，有了它处理文字变得非常方便，这一篇我继续介绍YYText的使用方法，希望对大家能有所帮助。大家如感兴趣还可以参考：
1.YYText使用篇（一）
2.YYText使用篇（二）
3.YYText使用篇（三）
4.YYText使用篇（四）
5.YYText使用篇（五）
6.YYText使用篇（六）

一、YYText示例

下面我们看另外一个例子，先看代码。

#import "YYTextAttachmentExample.h"
#import "YYText.h"
#import "YYImage.h"
#import "UIImage+YYWebImage.h"
#import "UIView+YYAdd.h"
#import "NSBundle+YYAdd.h"
#import "NSString+YYAdd.h"
#import "YYTextExampleHelper.h"
#import "YYGestureRecognizer.h"

@interface YYTextAttachmentExample () <UIGestureRecognizerDelegate>

@property (nonatomic, strong) YYLabel *label;

@end

@implementation YYTextAttachmentExample

#pragma mark - Override Base Function

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];
    [YYTextExampleHelper addDebugOptionToViewController:self];

    NSMutableAttributedString *text = [NSMutableAttributedString new];
    UIFont *font = [UIFont systemFontOfSize:16];
    
    //第一行文字
    {
        NSString *title = @"This is UIImage attachment:";
        [text appendAttributedString:[[NSAttributedString alloc] initWithString:title attributes:nil]];
        
        UIImage *image = [UIImage imageNamed:@"dribbble64_imageio"];
        image = [UIImage imageWithCGImage:image.CGImage scale:2 orientation:UIImageOrientationUp];
        
        NSMutableAttributedString *attachText = [NSMutableAttributedString yy_attachmentStringWithContent:image contentMode:UIViewContentModeCenter attachmentSize:image.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
        [text appendAttributedString:attachText];
        [text appendAttributedString:[[NSAttributedString alloc] initWithString:@"\n" attributes:nil]];
    }
    
    //第二行文字
    {
        NSString *title = @"This is UIView attachment: ";
        [text appendAttributedString:[[NSAttributedString alloc] initWithString:title attributes:nil]];
        
        UISwitch *switcher = [UISwitch new];
        [switcher sizeToFit];
        
        NSMutableAttributedString *attachText = [NSMutableAttributedString yy_attachmentStringWithContent:switcher contentMode:UIViewContentModeCenter attachmentSize:switcher.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
        [text appendAttributedString:attachText];
        [text appendAttributedString:[[NSAttributedString alloc] initWithString:@"\n" attributes:nil]];
    }
    
    //第三行文字
    {
        NSString *title = @"This is Animated Image attachment:";
        [text appendAttributedString:[[NSAttributedString alloc] initWithString:title attributes:nil]];
        
        NSArray *names = @[@"001", @"022", @"019",@"056",@"085"];
        for (NSString *name in names) {
            NSString *path = [[NSBundle mainBundle] pathForScaledResource:name ofType:@"gif" inDirectory:@"EmoticonQQ.bundle"];
            NSData *data = [NSData dataWithContentsOfFile:path];
            YYImage *image = [YYImage imageWithData:data scale:2];
            image.preloadAllAnimatedImageFrames = YES;
            YYAnimatedImageView *imageView = [[YYAnimatedImageView alloc] initWithImage:image];
            
            NSMutableAttributedString *attachText = [NSMutableAttributedString yy_attachmentStringWithContent:imageView contentMode:UIViewContentModeCenter attachmentSize:imageView.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
            [text appendAttributedString:attachText];
        }
        
        YYImage *image = [YYImage imageNamed:@"pia"];
        image.preloadAllAnimatedImageFrames = YES;
        YYAnimatedImageView *imageView = [[YYAnimatedImageView alloc] initWithImage:image];
        imageView.autoPlayAnimatedImage = NO;
        [imageView startAnimating];
        
        NSMutableAttributedString *attachText = [NSMutableAttributedString yy_attachmentStringWithContent:imageView contentMode:UIViewContentModeCenter attachmentSize:imageView.size alignToFont:font alignment:YYTextVerticalAlignmentBottom];
        [text appendAttributedString:attachText];
        
        [text appendAttributedString:[[NSAttributedString alloc] initWithString:@"\n" attributes:nil]];
    }
    
    text.yy_font = font;
    
    _label = [YYLabel new];
    _label.userInteractionEnabled = YES;
    _label.numberOfLines = 0;
    _label.textVerticalAlignment = YYTextVerticalAlignmentTop;
    _label.size = CGSizeMake(260, 260);
    _label.center = CGPointMake(self.view.width / 2, self.view.height / 2);
    _label.attributedText = text;
    [self addSeeMoreButton];
    [self.view addSubview:_label];
    
    _label.layer.borderWidth = 0.5;
    _label.layer.borderColor = [UIColor colorWithRed:0.000 green:0.463 blue:1.000 alpha:1.000].CGColor;
    
    __weak typeof(_label) wlabel = _label;
    UIView *dot = [self newDotView];
    dot.center = CGPointMake(_label.width, _label.height);
    dot.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin;
    [_label addSubview:dot];
    
    YYGestureRecognizer *gesture = [YYGestureRecognizer new];
    gesture.action = ^(YYGestureRecognizer *gesture, YYGestureRecognizerState state) {
        if (state != YYGestureRecognizerStateMoved) return;
        CGFloat width = gesture.currentPoint.x;
        CGFloat height = gesture.currentPoint.y;
        wlabel.width = width < 30 ? 30 : width;
        wlabel.height = height < 30 ? 30 : height;
    };
    gesture.delegate = self;
    [_label addGestureRecognizer:gesture];
}

#pragma mark - Object Private Function

- (void)addSeeMoreButton
{
    __weak typeof(self) _self = self;
    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"...more"];
    
    YYTextHighlight *hi = [YYTextHighlight new];
    [hi setColor:[UIColor colorWithRed:0.578 green:0.790 blue:1.000 alpha:1.000]];
    hi.tapAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
        YYLabel *label = _self.label;
        [label sizeToFit];
    };
    
    [text yy_setColor:[UIColor colorWithRed:0.000 green:0.449 blue:1.000 alpha:1.000] range:[text.string rangeOfString:@"more"]];
    [text yy_setTextHighlight:hi range:[text.string rangeOfString:@"more"]];
    text.yy_font = _label.font;
    
    YYLabel *seeMore = [YYLabel new];
    seeMore.attributedText = text;
    [seeMore sizeToFit];
    
    NSAttributedString *truncationToken = [NSAttributedString yy_attachmentStringWithContent:seeMore contentMode:UIViewContentModeCenter attachmentSize:seeMore.size alignToFont:text.yy_font alignment:YYTextVerticalAlignmentCenter];
    _label.truncationToken = truncationToken;
}

- (UIView *)newDotView
{
    UIView *view = [UIView new];
    view.size = CGSizeMake(50, 50);
    
    UIView *dot = [UIView new];
    dot.size = CGSizeMake(10, 10);
    dot.backgroundColor = [UIColor colorWithRed:0.000 green:0.463 blue:1.000 alpha:1.000];
    dot.clipsToBounds = YES;
    dot.layer.cornerRadius = dot.height / 2;
    dot.center = CGPointMake(view.width / 2, view.height / 2);
    [view addSubview:dot];
    
    return view;
}

#pragma mark - UIGestureRecognizerDelegate

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    CGPoint p = [gestureRecognizer locationInView:_label];
    if (p.x < _label.width - 20)
        return NO;
    if (p.y < _label.height - 20)
        return NO;
    return YES;
}

@end