ParagraphString - 段落样式的简易处理

ParagraphString - 段落样式的简易处理

效果

源码

https://github.com/YouXianMing/UI-Component-Collection 中的 ParagraphString

//

//  ParagraphString.h

//  RichString

//

//  Created by YouXianMing on 2016/11/11.

//  Copyright © 2016年 TechCode. All rights reserved.

//

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

#import "BaseParagraphStyle.h"

@interface ParagraphString : NSObject

/**

 The input string.

 */

@property (nonatomic, strong) NSString            *string;

/**

 Set the string's font, default is nil.

 */

@property (nonatomic, strong) UIFont              *font;

/**

 Set the string's textColor, default is nil.

 */

@property (nonatomic, strong) UIColor             *textColor;

/**

 Set the paragraph style, default is nil.

 */

@property (nonatomic, strong) BaseParagraphStyle  *paragraphStyle;

/**

 Make the config (Font, textColor, paragraphStyle) effective.

 */

- (void)makeConfigEffective;

/**

 The attributedString, before you get this, you should set property and run makeConfigEffective first.

 */

@property (nonatomic, strong, readonly) NSMutableAttributedString *attributedString;

/**

 The string's height with the fixed width.

 @param width The specified width.

 @return The string's height.

 */

- (CGFloat)heightWithFixedWidth:(CGFloat)width;

/**

 The string's height with the fixed width.

 @param lines The number of lines.

 @param width The specified width.

 @return The string's height.

 */

- (CGFloat)numberOfLines:(NSInteger)lines fixedWidth:(CGFloat)width;

/**

 ParagraphString's constructor.

 @param string The string.

 @param font The font.

 @param color The color.

 @param style The paragraph style.

 @return The ParagraphString's instance.

 */

+ (instancetype)paragraphStringWithString:(NSString *)string font:(UIFont *)font color:(UIColor *)color

                           paragraphStyle:(BaseParagraphStyle *)style;

@end

//

//  ParagraphString.m

//  RichString

//

//  Created by YouXianMing on 2016/11/11.

//  Copyright © 2016年 TechCode. All rights reserved.

//

#import "ParagraphString.h"

@interface ParagraphString ()

@property (nonatomic, strong) NSMutableAttributedString *attributedString;

@end

@implementation ParagraphString

- (void)makeConfigEffective {

    if (self.string) {

        NSRange range = NSMakeRange(, self.string.length);

        NSMutableAttributedString *richString = [[NSMutableAttributedString alloc] initWithString:self.string];

        self.font           ? [richString addAttribute:NSFontAttributeName            value:self.font range:range]           : ;

        self.textColor      ? [richString addAttribute:NSForegroundColorAttributeName value:self.textColor range:range]      : ;

        self.paragraphStyle ? [richString addAttribute:NSParagraphStyleAttributeName  value:self.paragraphStyle range:range] : ;

        self.attributedString = richString;

    } else {

        self.attributedString = nil;

    }

}

+ (instancetype)paragraphStringWithString:(NSString *)string font:(UIFont *)font color:(UIColor *)color

                           paragraphStyle:(BaseParagraphStyle *)style {

    ParagraphString *paragraphString = [[[self class] alloc] init];

    paragraphString.string           = string;

    paragraphString.font             = font;

    paragraphString.textColor        = color;

    paragraphString.paragraphStyle   = style;

    [paragraphString makeConfigEffective];

    return paragraphString;

}

- (CGFloat)heightWithFixedWidth:(CGFloat)width {

    CGFloat height = ;

    if (self.attributedString) {

        CGRect rect = [self.attributedString boundingRectWithSize:CGSizeMake(width, MAXFLOAT)

                                                          options:NSStringDrawingTruncatesLastVisibleLine |NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading

                                                          context:nil];

        height = rect.size.height;

    }

    return height;

}

- (CGFloat)numberOfLines:(NSInteger)lines fixedWidth:(CGFloat)width {

    NSRange                    range      = NSMakeRange(, self.string.length);

    NSMutableAttributedString *richString = [[NSMutableAttributedString alloc] initWithString:self.string];

    self.font           ? [richString addAttribute:NSFontAttributeName            value:self.font range:range]           : ;

    self.textColor      ? [richString addAttribute:NSForegroundColorAttributeName value:self.textColor range:range]      : ;

    self.paragraphStyle ? [richString addAttribute:NSParagraphStyleAttributeName  value:self.paragraphStyle range:range] : ;

    UILabel *label       = [[UILabel alloc] initWithFrame:CGRectMake(, , width, )];

    label.numberOfLines  = lines;

    label.attributedText = richString;

    [label sizeToFit];

    return label.frame.size.height;

}

@end

//

//  BaseParagraphStyle.h

//  RichString

//

//  Created by YouXianMing on 2016/11/11.

//  Copyright © 2016年 TechCode. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface BaseParagraphStyle : NSMutableParagraphStyle

@end

//

//  BaseParagraphStyle.m

//  RichString

//

//  Created by YouXianMing on 2016/11/11.

//  Copyright © 2016年 TechCode. All rights reserved.

//

#import "BaseParagraphStyle.h"

@implementation BaseParagraphStyle

@end