FXLabel支持中文行距的简单修改
新版的FXLabel已经可以支持设置行间距了，但发现不能支持中文，遂简单改写了一下应急用主要修改函数：
- (NSArray *)FXLabel_linesWithFont:(UIFont *)font
constrainedToSize:(CGSize)size
lineBreakMode:(NSLineBreakMode)lineBreakMode
lineSpacing:(CGFloat)lineSpacing
characterSpacing:(CGFloat)characterSpacing
kerningTable:(NSDictionary *)kerningTable
allowOrphans:(BOOL)allowOrphans
此函数中函数word的识别是根据“ ”空格区分的，中文字之间没有，所以识别上有问题。
简单的修改思路是将每个字符作为一个word，也就是类似NSLineBreakByCharWrapping模式
修改代码如下：
[cpp]
- (NSArray *)FXLabel_linesWithFont:(UIFont *)font
constrainedToSize:(CGSize)size
lineBreakMode:(NSLineBreakMode)lineBreakMode
lineSpacing:(CGFloat)lineSpacing
characterSpacing:(CGFloat)characterSpacing
kerningTable:(NSDictionary *)kerningTable
allowOrphans:(BOOL)allowOrphans
{
//TODO: handle lineBreakMode of type NSLineBreakByCharWrapping
//this will require splitting text into individual characters
//split text into words
NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:0];
for (int i=0; i<self.length; i++)
{
NSString *str = [self substringWithRange:NSMakeRange(i,1)];
NSLog(@"%@", str);
[array addObject:str];
}
NSArray *words = [NSArray arrayWithArray:array];
// NSString *text = [self stringByReplacingOccurrencesOfString:@"\t" withString:@" "];
// text = [text stringByReplacingOccurrencesOfString:@"\n" withString:@" \n "];
// 空格作为分隔符
// NSArray *words = [text componentsSeparatedByString:@" "];
words = [words filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"length > 0"]];
//calculate lines
NSInteger index = 0;
NSMutableArray *lines = [NSMutableArray array];
while (index < [words count])
{
NSInteger lineCount = [lines count];
if (lineCount && ((lineCount + 1) * font.lineHeight + lineCount * font.pointSize * lineSpacing) > size.height)
{
//append remaining text to last line
NSArray *remainingWords = [words subarrayWithRange:NSMakeRange(index, [words count] - index)];
NSString *line = [lines lastObject];
// 加回空格分隔符
//NSString *newLine = [line length]? [line stringByAppendingString:@" "]: @"";
NSString *newLine = [line length]? line : @"";
// 加回空格分隔符
//newLine = [newLine stringByAppendingString:[remainingWords componentsJoinedByString:@" "]];
newLine = [newLine stringByAppendingString:[remainingWords componentsJoinedByString:@""]];
newLine = [newLine stringByReplacingOccurrencesOfString:@"\n " withString:@"\n"];
newLine = [newLine stringByReplacingOccurrencesOfString:@" \n" withString:@"\n"];
[lines replaceObjectAtIndex:lineCount - 1 withObject:newLine];
break;
}
NSString *line = nil;
for (int i = index; i < [words count]; i++)
{
NSString *word = words[i];
// 加回空格分隔符
//NSString *newLine = line? [line stringByAppendingFormat:@" %@", word]: word;
NSString *newLine = line? [line stringByAppendingFormat:@"%@", word]: word;
CGFloat lineWidth = [newLine sizeWithFont:font
minFontSize:font.pointSize
actualFontSize:NULL
forWidth:INFINITY
lineBreakMode:lineBreakMode
characterSpacing:characterSpacing
kerningTable:kerningTable].width;
if ([word isEqualToString:@"\n"])
补充：综合编程 , 其他综合 ,
