為了方便記錄
轉(zhuǎn)自：https://www.cnblogs.com/tangyuanby2/p/7091203.html
#import <CoreText/CoreText.h>
- (NSArray *)getLinesArrayOfStringInLabel:(UILabel *)label{
? ? NSString *text = [label text];
? ? UIFont *font = [label font];
? ? CGRect rect = [label frame];
? ? CTFontRef myFont = CTFontCreateWithName(( 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)];
? ? CFRelease(myFont);
? ? CTFramesetterRef frameSetter = CTFramesetterCreateWithAttributedString(( 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 = ( 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];
? ? ? ? CFAttributedStringSetAttribute((CFMutableAttributedStringRef)attStr, lineRange, kCTKernAttributeName, (CFTypeRef)([NSNumber numberWithFloat:0.0]));
? ? ? ? CFAttributedStringSetAttribute((CFMutableAttributedStringRef)attStr, lineRange, kCTKernAttributeName, (CFTypeRef)([NSNumber numberWithInt:0.0]));
? ? ? ? //NSLog(@"''''''''''''''''''%@",lineString);
? ? ? ? [linesArray addObject:lineString];
? ? }
? ? CGPathRelease(path);
? ? CFRelease( frame );
? ? CFRelease(frameSetter);
? ? return (NSArray *)linesArray;
}
