使用方法：直接調取該類方法即可

.h

#import <Foundation/Foundation.h>

@interface HXBSaveTool : NSObject

+ (void)setObject:(id)value forKey:(NSString *)defaultName;

+ (id)objectForKey:(NSString *)defaultName;

+ (void)setValue:(id)value forKey:(NSString *)defaultName;

+ (id)valueForKey:(NSString *)defaultName;

+(void)removeObjectForKey:(NSString*)key;

+(void)clearAll;

@end

.m

#import "HXBSaveTool.h"

@implementation HXBSaveTool

+ (void)setObject:(id)value forKey:(NSString *)defaultName{
    [[NSUserDefaults standardUserDefaults] setObject:value forKey:defaultName];
    [[NSUserDefaults standardUserDefaults] synchronize];
    
}

+ (id)objectForKey:(NSString *)defaultName
{
    return [[NSUserDefaults standardUserDefaults] objectForKey:defaultName];
}

+(void)setValue:(id)value forKey:(NSString *)defaultName
{
    [[NSUserDefaults standardUserDefaults] setValue:value forKey:defaultName];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

+(id)valueForKey:(NSString *)defaultName
{
    return [[NSUserDefaults standardUserDefaults] objectForKey:defaultName];
}

+(void)removeObjectForKey:(NSString *)key
{
    [[NSUserDefaults standardUserDefaults] removeObjectForKey:key];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

+(void)clearAll {
    NSUserDefaults *userDefatluts = [NSUserDefaults standardUserDefaults];
    NSDictionary *dictionary = userDefatluts.dictionaryRepresentation;;
    for(NSString* key in [dictionary allKeys]){
        if ([key isEqualToString:@"isFirst"]) {
            continue;
        }
        [userDefatluts removeObjectForKey:key];
        [userDefatluts synchronize];
    }
}

@end