最近在项目开发中遇到了设置多行文本，点击蓝色邮箱部分跳转到发邮件页面功能。当然比较简单的方式是多标签单独设置，那样稍显麻烦。我们能不能用一个控件，给某一部分添加点击事件，结果是可以的，UITextView完美实现这个功能，代码如下。
1、添加UITextView的代理UITextViewDelegate
2、@property (nonatomic, strong) UITextView *textRemind;//设置UITextView属性变量
- (UITextView *)textRemind{
if (_textRemind == nil) {
_textRemind = [[UITextView alloc]init];
_textRemind.backgroundColor = [UIColor greenColor];
_textRemind.textColor=K_CC_COLOR_STRING(@"#999999");
//_textRemind.textAlignment = NSTextAlignmentRight;//此处没有效果，需要在属性里面单独设置
_textRemind.font = K_CC_FONT_SEMIBOLD(14);
}
return _textRemind;
}
//顶部菜单标题
NSString *firstStr=@"此功能暂时无法使用,请联系\n";
NSString *secondStr=@"guanshuai@cloudcc.com\n";
NSString *thirdStr=@"或\n";
NSString *fourthStr=@"rjr@cloudcc.com\n";
NSString *fifthStr=@"开通";
NSString *remindStr=[NSString stringWithFormat:@"%@%@%@%@%@",firstStr,secondStr,thirdStr,fourthStr,fifthStr];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:remindStr];
//给需要点击的部分添加关键字
[attributedString addAttribute:NSLinkAttributeName
value:@"firstmanager"
range:[[attributedString string] rangeOfString:secondStr]];
[attributedString addAttribute:NSLinkAttributeName
value:@"secondmanager"
range:[[attributedString string] rangeOfString:fourthStr]];
//设置水平中间对齐
NSMutableParagraphStyle *paragrahStyle = [[NSMutableParagraphStyle alloc] init];
[paragrahStyle setAlignment:NSTextAlignmentCenter];
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragrahStyle range:NSMakeRange(0, remindStr.length)];
self.textRemind.attributedText = attributedString;
//设置点击部分的文字颜色
self.textRemind.linkTextAttributes = @{NSForegroundColorAttributeName: K_CC_COLOR_STRING(@"#2D6CFC") };
self.textRemind.editable = NO; //必须禁止输入，否则点击将弹出输入键盘
self.textRemind.scrollEnabled = NO;
self.textRemind.selectable = NO;
self.textRemind.delegate = self;
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(addGestureRecognizer:)];
[self.textRemind addGestureRecognizer:tapRecognizer];
[self.view addSubview:self.textRemind];
[self.textRemind mas_makeConstraints:^(MASConstraintMaker *make) {
make.center.equalTo(self.view);
make.height.mas_equalTo(100);
make.width.mas_equalTo(K_CC_SCREEN_WIDTH-32);
}];
3、添加手势处理
-(void)addGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer{
if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]])
{
CGPoint tapLocation = [gestureRecognizer locationInView:self.textRemind];
UITextPosition *textPosition = [self.textRemind closestPositionToPoint:tapLocation];
NSDictionary *attributes = [self.textRemind textStylingAtPosition:textPosition inDirection:UITextStorageDirectionBackward];
NSURL *url = attributes[NSLinkAttributeName];
if(url) {
NSRange range = [self.textRemind.text rangeOfString:@"guanshuai@cloudcc.com\n"];
if (([url isKindOfClass:[NSString class]] && [(NSString *)url isEqualToString:@"firstmanager"])) {
range = [self.textRemind.text rangeOfString:@"guanshuai@cloudcc.com\n"];
} else if(([url isKindOfClass:[NSString class]] && [(NSString *)url isEqualToString:@"secondmanager"])){
range = [self.textRemind.text rangeOfString:@"rjr@cloudcc.com\n"];
}
[self textView:self.textRemind shouldInteractWithURL:url inRange:range];
}
}
}
- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange{
if ([(NSString *)URL isEqualToString:@"firstmanager"]) {
return NO;
} else if ([(NSString *)URL isEqualToString:@"secondmanager"]) {
return NO;
}
return YES;
}