UILabel两端对齐

label.m

- (NSAttributedString *)textAligenJustifiedWith:(NSString *)text lineSpace:(CGFloat)lineSpace {
    
    NSMutableAttributedString *mutableAttributedString = [[NSMutableAttributedString alloc] initWithString:text];
    
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.alignment = NSTextAlignmentJustified;
    paragraphStyle.paragraphSpacing = 11.0;
    paragraphStyle.paragraphSpacingBefore = 10.0;
    paragraphStyle.firstLineHeadIndent = 0.0;
    paragraphStyle.headIndent = 0.0;
    paragraphStyle.lineSpacing = lineSpace;
    
    NSDictionary *dict = @{
                           NSForegroundColorAttributeName :self.textColor,
                           NSFontAttributeName: self.font,
                           NSParagraphStyleAttributeName: paragraphStyle,
                           NSUnderlineStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleNone]
                           };
    
    [mutableAttributedString setAttributes:dict range:NSMakeRange(0, mutableAttributedString.length)];
    
    NSAttributedString *attrString = [mutableAttributedString copy];
    
    return attrString;
}


- (NSAttributedString *)textAligenJustifiedWith:(NSString *)text {
    
    NSMutableAttributedString *mutableAttributedString = [[NSMutableAttributedString alloc] initWithString:text];
    
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.alignment = NSTextAlignmentJustified;
    paragraphStyle.paragraphSpacing = 11.0;
    paragraphStyle.paragraphSpacingBefore = 10.0;
    paragraphStyle.firstLineHeadIndent = 0.0;
    paragraphStyle.headIndent = 0.0;

    NSDictionary *dict = @{
                           NSForegroundColorAttributeName :self.textColor,
                           NSFontAttributeName: self.font,
                           NSParagraphStyleAttributeName: paragraphStyle,
                           NSUnderlineStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleNone]
                           };
    
    [mutableAttributedString setAttributes:dict range:NSMakeRange(0, mutableAttributedString.length)];
    
    NSAttributedString *attrString = [mutableAttributedString copy];
    
    return attrString;
}