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该bug曾经导致NSParagraphStyle相关的功能无法通过模板进行覆盖，只要在模板和text里同时定义了NSParagraphStyle相关的属性，模板里的NSParagraphStyle属性就会被覆盖
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Matt Cai
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Nov 1, 2018
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,20 @@ | ||
| // | ||
| // NUDParagraphStyle.h | ||
| // textExample | ||
| // | ||
| // Created by Ruite Chen on 2018/11/1. | ||
| // Copyright © 2018 com.CAI. All rights reserved. | ||
| // | ||
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| #import <UIKit/UIKit.h> | ||
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| @interface NUDParagraphStyle : NSMutableParagraphStyle | ||
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| @end | ||
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| @interface NSMutableParagraphStyle (NUDParagraphStyle) | ||
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| - (void)nud_mergeParagraphStyle:(NSMutableParagraphStyle *)paragraphStyle; | ||
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| @end | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // | ||
| // NUDParagraphStyle.m | ||
| // textExample | ||
| // | ||
| // Created by Ruite Chen on 2018/11/1. | ||
| // Copyright © 2018 com.CAI. All rights reserved. | ||
| // | ||
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| #import "NUDParagraphStyle.h" | ||
| #import <objc/runtime.h> | ||
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| @interface NUDParagraphStyle () | ||
| - (void)addTag:(NSString *)key; | ||
| - (NSArray<NSString *> *)keyTags; | ||
| @end | ||
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| @implementation NUDParagraphStyle | ||
| - (void)setLineSpacing:(CGFloat)lineSpacing { | ||
| [super setLineSpacing:lineSpacing]; | ||
| [self addTag:@"lineSpacing"]; | ||
| } | ||
| - (void)setParagraphSpacing:(CGFloat)paragraphSpacing { | ||
| [super setParagraphSpacing:paragraphSpacing]; | ||
| [self addTag:@"paragraphSpacing"]; | ||
| } | ||
| - (void)setParagraphSpacingBefore:(CGFloat)paragraphSpacingBefore { | ||
| [super setParagraphSpacingBefore:paragraphSpacingBefore]; | ||
| [self addTag:@"paragraphSpacingBefore"]; | ||
| } | ||
| - (void)setAlignment:(NSTextAlignment)alignment { | ||
| [super setAlignment:alignment]; | ||
| [self addTag:@"alignment"]; | ||
| } | ||
| - (void)setFirstLineHeadIndent:(CGFloat)firstLineHeadIndent { | ||
| [super setFirstLineHeadIndent:firstLineHeadIndent]; | ||
| [self addTag:@"firstLineHeadIndent"]; | ||
| } | ||
| - (void)setHeadIndent:(CGFloat)headIndent { | ||
| [super setHeadIndent:headIndent]; | ||
| [self addTag:@"headIndent"]; | ||
| } | ||
| - (void)setTailIndent:(CGFloat)tailIndent { | ||
| [super setTailIndent:tailIndent]; | ||
| [self addTag:@"tailIndent"]; | ||
| } | ||
| - (void)setLineBreakMode:(NSLineBreakMode)lineBreakMode { | ||
| [super setLineBreakMode:lineBreakMode]; | ||
| [self addTag:@"lineBreakMode"]; | ||
| } | ||
| - (void)setMaximumLineHeight:(CGFloat)maximumLineHeight { | ||
| [super setMaximumLineHeight:maximumLineHeight]; | ||
| [self addTag:@"maximumLineHeight"]; | ||
| } | ||
| - (void)setMinimumLineHeight:(CGFloat)minimumLineHeight { | ||
| [super setMinimumLineHeight:minimumLineHeight]; | ||
| [self addTag:@"minimumLineHeight"]; | ||
| } | ||
| - (void)setBaseWritingDirection:(NSWritingDirection)baseWritingDirection { | ||
| [super setBaseWritingDirection:baseWritingDirection]; | ||
| [self addTag:@"baseWritingDirection"]; | ||
| } | ||
| - (void)setLineHeightMultiple:(CGFloat)lineHeightMultiple { | ||
| [super setLineHeightMultiple:lineHeightMultiple]; | ||
| [self addTag:@"lineHeightMultiple"]; | ||
| } | ||
| - (void)setHyphenationFactor:(float)hyphenationFactor { | ||
| [super setHyphenationFactor:hyphenationFactor]; | ||
| [self addTag:@"hyphenationFactor"]; | ||
| } | ||
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| - (void)addTag:(NSString *)key { | ||
| NSMutableArray<NSString *> *keys = objc_getAssociatedObject(self, "com.NudeIn.NUDParagraphStyle.keys"); | ||
| if (!keys) { | ||
| keys = [NSMutableArray new]; | ||
| objc_setAssociatedObject(self, "com.NudeIn.NUDParagraphStyle.keys", keys, OBJC_ASSOCIATION_RETAIN_NONATOMIC); | ||
| } | ||
| [keys addObject:key]; | ||
| } | ||
| - (NSArray<NSString *> *)keyTags { | ||
| NSArray<NSString *> *keys = objc_getAssociatedObject(self, "com.NudeIn.NUDParagraphStyle.keys"); | ||
| return keys; | ||
| } | ||
| @end | ||
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| @implementation NSMutableParagraphStyle (NUDParagraphStyle) | ||
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| - (void)nud_mergeParagraphStyle:(NSMutableParagraphStyle *)paragraphStyle { | ||
| if ([paragraphStyle isKindOfClass:[NUDParagraphStyle class]]) { | ||
| for (NSString *key in ((NUDParagraphStyle *)paragraphStyle).keyTags) { | ||
| [self setValue:[paragraphStyle valueForKey:key] forKey:key]; | ||
| } | ||
| }else { | ||
| @throw [NSException exceptionWithName:NSInternalInconsistencyException | ||
| reason:@"NSMutableParagraphStyle is not a NUDParagraphStyle" userInfo:nil]; | ||
| } | ||
| } | ||
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| @end |
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