前段时间遇到一个问题需要把UILabel显示时遇到网址便自动转化成网络链接，最终效果如下
实现步骤如下：首先在https://github.com/petrpavlik/PPLabel下载PPLabel并导入到自己的工程文件，然后在需要使用的
#import "PPLabel.h"
添加这个协议：PPLabelDelegate
self.label=[[PPLabel alloc]initWithFrame:CGRectMake(20, 40, SCREEN_WIDTH-40, rect.size.height +5)];
self.label.delegate=self;
self.label.text=[_FAG integerValue]==1?_taskmodel.des:_taskupmodel.des;
self.label.font = [UIFont systemFontOfSize:15];
self.label.textColor = HEXCOLOR(0X888888);
self.label.numberOfLines=0;
[view addSubview:self.label];
//self.label=desLabel;
// self.label.delegate=self;
NSError *error = NULL;
NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:&error];
self.matches = [detector matchesInString:self.label.text options:0 range:NSMakeRange(0, self.label.text.length)];
[self highlightLinksWithIndex:NSNotFound];
- (void)label:(PPLabel *)label didBeginTouch:(UITouch *)touch onCharacterAtIndex:(CFIndex)charIndex {
[self highlightLinksWithIndex:charIndex];
}
- (void)label:(PPLabel *)label didMoveTouch:(UITouch *)touch onCharacterAtIndex:(CFIndex)charIndex {
[self highlightLinksWithIndex:charIndex];
}
- (void)label:(PPLabel *)label didEndTouch:(UITouch *)touch onCharacterAtIndex:(CFIndex)charIndex {
[self highlightLinksWithIndex:NSNotFound];
for (NSTextCheckingResult *match in self.matches) {
if ([match resultType] == NSTextCheckingTypeLink) {
NSRange matchRange = [match range];
if ([self isIndex:charIndex inRange:matchRange]) {
[[UIApplication sharedApplication] openURL:match.URL];
break;
}
}
}
}
- (void)label:(PPLabel *)label didCancelTouch:(UITouch *)touch {
[self highlightLinksWithIndex:NSNotFound];
}
#pragma mark -
- (BOOL)isIndex:(CFIndex)index inRange:(NSRange)range {
return index > range.location && index < range.location+range.length;
}
- (void)highlightLinksWithIndex:(CFIndex)index {
NSMutableAttributedString* attributedString = [self.label.attributedText mutableCopy];
for (NSTextCheckingResult *match in self.matches) {
if ([match resultType] == NSTextCheckingTypeLink) {
NSRange matchRange = [match range];
if ([self isIndex:index inRange:matchRange]) {
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:matchRange];
}
else {
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:matchRange];
}
[attributedString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:matchRange];
}
}
self.label.attributedText = attributedString;
}