设置文本行距
objectivec
UILabel *label = [[UILabel alloc] init];
label.font = [UIFont systemFontOfSize:12];
label.numberOfLines = 0;
label.lineBreakMode = NSLineBreakByWordWrapping;
label.textColor = [UIColor colorWithHexString:@"B3B3B3"];
label.text = textDes;
//设置行距
NSMutableParagraphStyle *style = [NSMutableParagraphStyle new];
style.lineSpacing = 3;
NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
[attributes setObject:style forKey:NSParagraphStyleAttributeName];
label.attributedText = [[NSAttributedString alloc] initWithString:label.text attributes:attributes];
获取文本行数
objectivec
//获取文本行数
- (int)getNumberOfLinesWithText:(NSMutableAttributedString *)text andLabelWidth:(CGFloat)width {
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)text);
CGMutablePathRef Path = CGPathCreateMutable();
CGPathAddRect(Path, NULL ,CGRectMake(0 , 0 , width, INT_MAX));
CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
// 得到字串在frame中被自动分成了多少个行。
CFArrayRef rows = CTFrameGetLines(frame);
// 实际行数
CFIndex numberOfLines = CFArrayGetCount(rows);
CFRelease(frame);
CGPathRelease(Path);
CFRelease(framesetter);
return numberOfLines;
}
使用
objectivec
//设置行距
NSMutableParagraphStyle *style = [NSMutableParagraphStyle new];
style.lineSpacing = 3;
NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
[attributes setObject:style forKey:NSParagraphStyleAttributeName];
//获取行数
int nums = [self getNumberOfLinesWithText:[[NSMutableAttributedString alloc] initWithString:self.permissionDes attributes:attributes] andLabelWidth:SCREENWIDTH- 40];