搜索时，一般都需要在搜索结果中将搜索关键字进行高亮显示，于是就有了这个小东西。
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| #import <UIKit/UIKit.h>
@interface JTHighlightedLabel : UILabel
@property (nonatomic, strong) UIColor *highlightedColor;
- (void)setText:(NSString *)text hightlightText:(NSString *)highlightText;
@end
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| #import "JTHighlightedLabel.h"
@implementation JTHighlightedLabel
- (void)setText:(NSString *)text hightlightText:(NSString *)highlightText withColor:(UIColor *)highlightColor highlightFont:(UIFont *)highlightFont {
if (color == nil) {
highlightColor = [UIColor blueColor];
}
if (font == nil) {
highlightFont = self.font;
}
if (text.length == 0) {
return;
}
if (highlightText.length == 0) {
self.text = text;
return;
}
NSMutableAttributedString *mutableAttributedStr = [[NSMutableAttributedString alloc] initWithString:text];
for (NSInteger j = 0; j <= keyWords.length - 1; j++) {
NSRange searchRange = NSMakeRange(0, [allStr length]);
NSRange range;
NSString *singleStr = [keyWords substringWithRange:NSMakeRange(j, 1)];
while
((range = [allStr rangeOfString:singleStr options:0 range:searchRange]).location != NSNotFound) {
//改变多次搜索时searchRange的位置
searchRange = NSMakeRange(NSMaxRange(range), [allStr length] - NSMaxRange(range));
//设置富文本
[mutableAttributedStr addAttribute:NSForegroundColorAttributeName value:color range:range];
[mutableAttributedStr addAttribute:NSFontAttributeName value:font range:range];
}
}
self.attributedText = mutableAttributedStr;
}
@end
|