给category添加基本数据类型属性

给category添加基本数据类型属性

给category添加基本数据类型属性

给category添加基本数据类型属性

说明

通常,我们添加属性都是通过对象扩展来实现的,其实,我们也可以用runtime来添加基本数据类型的属性

源码

//
// UIView+AnimationProperty.h
// RuntimeCategory
//
// Created by YouXianMing on 15/7/8.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
// #import <UIKit/UIKit.h> @interface UIView (AnimationProperty) @property (nonatomic) CGFloat scale; @end
//
// UIView+AnimationProperty.m
// RuntimeCategory
//
// Created by YouXianMing on 15/7/8.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
// #import "UIView+AnimationProperty.h"
#import <objc/runtime.h> @implementation UIView (AnimationProperty) NSString * const _recognizerScale = @"_recognizerScale";
- (void)setScale:(CGFloat)scale { objc_setAssociatedObject(self, (__bridge const void *)(_recognizerScale), @(scale), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
self.transform = CGAffineTransformMakeScale(scale, scale);
}
- (CGFloat)scale { NSNumber *scaleValue = objc_getAssociatedObject(self, (__bridge const void *)(_recognizerScale));
return scaleValue.floatValue;
} @end
//
// ViewController.m
// RuntimeCategory
//
// Created by YouXianMing on 15/7/8.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
// #import "ViewController.h"
#import "UIView+AnimationProperty.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad]; UIView *redView = [[UIView alloc] initWithFrame:CGRectMake(, , , )];
redView.backgroundColor = [UIColor redColor];
[self.view addSubview:redView]; UIView *greenView = [[UIView alloc] initWithFrame:CGRectMake(, , , )];
greenView.backgroundColor = [UIColor greenColor];
greenView.scale = 0.5f;
[self.view addSubview:greenView]; } @end

分析

给category添加基本数据类型属性

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