iOS性能优化 ASDK(现在叫:Texture) 文本位置

ASTextNode 文本位置 如果只是简单的AXTextNode替换UILabel 提升性能 并没有设置文本位置的属性 自定义一个HTTextNode

ASDK ASDK(Texture)

.h

#import <AssetsLibrary/AssetsLibrary.h>

//ASTextNode文本居中

@interfaceHTTextNode :ASDisplayNode

- (instancetype)initWithText:(NSString*)text;

@property(nonatomic, strong) NSAttributedString *attributedText;

//可以设置文本位置样式 

@property(nonatomic, assign) ASCenterLayoutSpecCenteringOptions option;

@end

.m

#import "HTTextNode.h"

@interface HTTextNode ()

@property (nonatomic, strong) ASTextNode *textNode;

@end

@implementation HTTextNode

- (instancetype)initWithText:(NSString*)text

{

    self= [superinit];

    if(self!=nil) {

        _textNode= [[ASTextNodealloc]init];

        _textNode.attributedText = [[NSAttributedString alloc] initWithString:text

                                                                   attributes:[selftextAttributes]];

        [selfaddSubnode:_textNode];

    }

    return self;

}

-(void)setFrame:(CGRect)frame

{

    [supersetFrame:frame];

}

-(void)setOption:(ASCenterLayoutSpecCenteringOptions)option

{

    _option= option;

}

-(void)setAttributedText:(NSAttributedString*)attributedText

{

    _attributedText= attributedText;

    _textNode.attributedText= attributedText;

}

- (ASLayoutSpec*)layoutSpecThatFits:(ASSizeRange)constrainedSize

{

    return [ASCenterLayoutSpec centerLayoutSpecWithCenteringOptions:_option?_option:ASCenterLayoutSpecCenteringXY sizingOptions:ASCenterLayoutSpecSizingOptionDefault child:_textNode];

}

#pragma mark - Text Formatting

- (NSDictionary*)textAttributes

{

    return @{

             NSFontAttributeName: [UIFont systemFontOfSize:32],

             NSForegroundColorAttributeName: [UIColor blackColor],

             };

}