发出get Lines Array of String in Label
发出get Lines Array of String in Label
提问于 2016-01-19 09:48:43
我有一串：“制作牙膏和洗口水的想法”。
我使用下面的代码来获取标签上的最后一个字符串。结果字符串的最后一行：“和一个洗口水。”但是标签上的最后一行显示：“牙膏和洗口水”如何准确地在标签上获得字符串lastline？下面是我的代码：
-(NSArray *)getLinesArrayOfStringInLabel:(UILabel *)label
{
NSString *text = [label text];
UIFont *font = [label font];
CGRect rect = [label bounds];
CTFontRef myFont = CTFontCreateWithName((__bridge CFStringRef)([font fontName]), [font pointSize], NULL);
NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc] initWithString:text];
[attStr addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)myFont range:NSMakeRange(0, attStr.length)];
CTFramesetterRef frameSetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attStr);
CGMutablePathRef path = CGPathCreateMutable();
CGPathAddRect(path, NULL, CGRectMake(0,0,rect.size.width,100000));
CTFrameRef frame = CTFramesetterCreateFrame(frameSetter, CFRangeMake(0, 0), path, NULL);
NSArray *lines = (__bridge NSArray *)CTFrameGetLines(frame);
NSMutableArray *linesArray = [[NSMutableArray alloc]init];
for (id line in lines)
{
CTLineRef lineRef = (__bridge CTLineRef )line;
CFRange lineRange = CTLineGetStringRange(lineRef);
NSRange range = NSMakeRange(lineRange.location, lineRange.length);
NSString *lineString = [text substringWithRange:range];
[linesArray addObject:lineString];
}
return (NSArray *)linesArray;
}回答 1
Stack Overflow用户
发布于 2016-01-19 15:15:45
你可以使用NSRange来获取你的字符串，下面的代码可以帮助你：
NSString *strSource=@"The idea of making a toothpaste and a mouthwashg";
NSRange r1 = [strSource rangeOfString:@"toothpaste"];
NSRange r2 = [strSource rangeOfString:@"mouthwashg"];
NSRange rSub = NSMakeRange(r1.location , r2.location + r2.length - r1.location );
NSLog(@"your string:%@",[strSource substringWithRange:rSub]);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/34867231
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