iOS MZSelectableLabel使用（建立富文本超链接

最近做UIlabel的超链接显示，用到了MZSelectableLabel，下面给大家介绍一下使用方法。

首先从网上下载MZSelectableLabel导入项目，就是下图的四个文件

文件截图.png

下面给大家看一下使用方法,这里介绍的时通过正则表达式识别超链接，当然你也可以自己建立超链接，并进行跳转；

首先初始化

MZSelectableLabel *_itemDetailLabel =[ [MZSelectableLabel  alloc] init];

_itemDetailLabel.text = @"nihaomahttp://www.baidu.com你好";


[self.view addSubview:_itemDetailLabel];

[self urlValidation:_itemDetailLabel.text];

实现urlValidation方法如下：

- (void)urlValidation:(NSString *)string {

string = [string stringByReplacingOccurrencesOfString:@" " withString:@""];

NSError *error;
//识别链接的正则表达式
NSString *regulaStr = @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)";
//与string做对比并获得超链接在string中的位置
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regulaStr options:NSRegularExpressionCaseInsensitive error:&error];

NSArray *arrayOfAllMatches = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];

NSMutableArray *urlStrs = [NSMutableArray array];

NSMutableArray *urlRanges = [NSMutableArray array];

// 行间距

NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];

[paragraphStyle setLineSpacing:8];

NSDictionary *allPerferDic = @{

NSForegroundColorAttributeName : [UIColor colorWithHexString:@"#646464"],

NSFontAttributeName            : [UIFont systemFontOfSize:14.0f],

NSParagraphStyleAttributeName  : paragraphStyle

};

NSMutableAttributedString *mas = [[NSMutableAttributedString alloc] initWithString:string];

[mas setAttributes:allPerferDic range:NSMakeRange(0, string.length)];

for (NSTextCheckingResult *match in arrayOfAllMatches){

NSString* substringForMatch = [string substringWithRange:match.range];

NSURL *url = [NSURL URLWithString:substringForMatch];

if (!url) {continue;}

[urlStrs addObject:[NSURL URLWithString:substringForMatch]];

[urlRanges addObject:[NSValue valueWithRange:match.range]];

}

[urlRanges enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop){

[mas addAttributes:@

{

NSForegroundColorAttributeName : [UIColor colorWithHexString:@"#15B1FF"],

NSFontAttributeName            : [UIFont systemFontOfSize:14.0]

} range:[obj rangeValue]];

}];

_itemDetailLabel.attributedText = mas;

_itemDetailLabel.userInteractionEnabled = YES;

if (!urlStrs.count) { return;}
    for (int i = 0; i<urlStrs.count; i++) {
        NSRange range = [urlRanges[i] rangeValue];
//设置超链接选中后的背景色
        [_itemDetailLabel setSelectableRange:range hightlightedBackgroundColor:[UIColor lightGrayColor]];
//实现超链接将要实现的方法，这里我写了一个通知来跳转界面，也可以写其他跳转方法
        _itemDetailLabel.selectionHandler = ^(NSRange range, NSString *string){
            NSLog(@"%@",string);
            [[NSNotificationCenter defaultCenter] postNotificationName:@"LinkAccess" object:string];

        };
    }
    

 
}

效果如下图:

Snip20161125_1.png

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