一、基本思路

1> 解决方案1，使用颜色作为图片素材的命名关键字
问题1：要保证每套图片的文件名 颜色＋ 名称.png的格式比较麻烦
问题2：如果要将某一个图片应用到其他皮肤不方便
2> 解决方案2，利用Bundle，将图片文件保存在不同的Bundle中
问题：平面设计师维护不方便
3> 解决方案3，利用文件夹(蓝色)，将图片文件保存在不同文件夹中
好处：便于平面设计师针对不同的文件夹维护图片素材

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *faceImageView;
@property (weak, nonatomic) IBOutlet UIImageView *heartImageView;
@property (weak, nonatomic) IBOutlet UIImageView *rectImageView;

@end

@implementation ViewController

/*
 问题一:默认进来没有皮肤颜色
 
 问题二:没有记录用户选中皮肤颜色
 
 问题三:和美工沟通的问题
 
 问题四:多个控制器的换肤
 */

- (void)viewDidLoad {
    [super viewDidLoad];
    
    NSString *skinColor = [[NSUserDefaults standardUserDefaults] objectForKey:@"skinColor"];
    if (skinColor == nil) {
        skinColor = @"blue";
    }
    
    [self changeSkinWithSkinColor:skinColor];
}

- (IBAction)changeToBlueSkin {
    [self changeSkinWithSkinColor:@"blue"];
}

- (IBAction)changeToRedSkin {
    [self changeSkinWithSkinColor:@"red"];
}

- (IBAction)changeToGreenSkin {
    [self changeSkinWithSkinColor:@"green"];
}

- (void)changeSkinWithSkinColor:(NSString *)skinColor
{
    NSString *faceImageName = [NSString stringWithFormat:@"skin/%@/face", skinColor];
    self.faceImageView.image = [UIImage imageNamed:faceImageName];
    NSString *heartImageName = [NSString stringWithFormat:@"skin/%@/heart", skinColor];
    self.heartImageView.image = [UIImage imageNamed:heartImageName];
    NSString *rectImageName = [NSString stringWithFormat:@"skin/%@/rect", skinColor];
    self.rectImageView.image = [UIImage imageNamed:rectImageName];
    
    // 记录用户选中的皮肤颜色
    [[NSUserDefaults standardUserDefaults] setObject:skinColor forKey:@"skinColor"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

@end

屏幕快照 2017-07-02 下午11.14.43.png

二、换肤工具类

#import <UIKit/UIKit.h>

@interface SkinTool : NSObject

+ (void)setSKinColor:(NSString *)skinColor;

+ (UIImage *)skinToolWithImageName:(NSString *)imageName;

+ (UIColor *)skinToolWithLabelColor;

@end


#import "SkinTool.h"

@implementation SkinTool

static NSString *_skinColor;

+ (void)initialize
{
    _skinColor = [[NSUserDefaults standardUserDefaults] objectForKey:@"skinColor"];
    if (_skinColor == nil) {
        _skinColor = @"blue";
    }
}

+ (void)setSKinColor:(NSString *)skinColor
{
    _skinColor = skinColor;
    
    // 保存用户选中的皮肤颜色
    [[NSUserDefaults standardUserDefaults] setObject:skinColor forKey:@"skinColor"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

+ (UIImage *)skinToolWithImageName:(NSString *)imageName
{
    NSString *imagePath = [NSString stringWithFormat:@"skin/%@/%@", _skinColor ,imageName];
    
    return [UIImage imageNamed:imagePath];
}

+ (UIColor *)skinToolWithLabelColor
{
    // 1.获取plist的路径
    NSString *plistName = [NSString stringWithFormat:@"skin/%@/bgColor.plist", _skinColor];
    NSString *plistPath = [[NSBundle mainBundle] pathForResource:plistName ofType:nil];
    
    // 2.读取颜色的点击
    NSDictionary *colorDict = [NSDictionary dictionaryWithContentsOfFile:plistPath];
    
    // 3.读取对应颜色的字符串
    NSString *colorString = colorDict[@"labelBgColor"];
    
    // 4.获取颜色数组
    NSArray *colorArray = [colorString componentsSeparatedByString:@","];
    
    // 5.读取对应RGB
    NSInteger red = [colorArray[0] integerValue];
    NSInteger green = [colorArray[1] integerValue];
    NSInteger blue = [colorArray[2] integerValue];
    
    return [UIColor colorWithRed:red/255.0 green:green/255.0 blue:blue/255.0 alpha:1.0];
}

@end


#import "ViewController.h"
#import "SkinTool.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *faceImageView;
@property (weak, nonatomic) IBOutlet UIImageView *heartImageView;
@property (weak, nonatomic) IBOutlet UIImageView *rectImageView;

@end

@implementation ViewController

/*
 问题一:默认进来没有皮肤颜色
 
 问题二:没有记录用户选中皮肤颜色
 
 问题三:和美工沟通的问题
 
 问题四:多个控制器的换肤
 
 问题五:换肤的ImageView不要写在viewDidLoad方法
 */

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self changeImages];
}
- (IBAction)changeToOrangeSkin {
    [SkinTool setSKinColor:@"orange"];
    
    [self changeImages];
}

- (IBAction)changeToBlueSkin {
    [SkinTool setSKinColor:@"blue"];
    
    [self changeImages];
}

- (IBAction)changeToRedSkin {
    [SkinTool setSKinColor:@"red"];
    
    [self changeImages];
}

- (IBAction)changeToGreenSkin {
    [SkinTool setSKinColor:@"green"];
    
    [self changeImages];
}

- (void)changeImages
{
    self.faceImageView.image = [SkinTool skinToolWithImageName:@"face"];
    self.heartImageView.image = [SkinTool skinToolWithImageName:@"heart"];
    self.rectImageView.image = [SkinTool skinToolWithImageName:@"rect"];
}

@end