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60 lines
1.6 KiB
60 lines
1.6 KiB
2 years ago
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//
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// MySingleton.m
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// ProvinceAndCityAndTown
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//
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// Created by 冷求慧 on 16/12/27.
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// Copyright © 2016年 冷求慧. All rights reserved.
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//
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#import "MySingleton.h"
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static MySingleton *mySing=nil;
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@implementation MySingleton
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+(instancetype)shareMySingleton{
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if (mySing==nil) {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{ // 用GCD只操作一次,确保线程的安全
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mySing=[[MySingleton alloc]init];
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});
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}
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return mySing;
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}
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// alloc 分配内存空间的时候
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+ (instancetype)allocWithZone:(struct _NSZone *)zone{
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if (mySing==nil) {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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mySing=[super allocWithZone:zone];
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});
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}
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return mySing;
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}
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// 复制 拷贝的时候
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+ (id)copyWithZone:(struct _NSZone *)zone{
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return mySing;
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}
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-(id)getObjectFromJsonString:(NSString *)jsonString{
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NSError *error=nil;
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if (jsonString) {
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id result=[NSJSONSerialization JSONObjectWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableLeaves error:&error];
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if (error==nil) {
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return result;
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}
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else{
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return nil;
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}
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}
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return nil;
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}
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+(void)saveLoacalWithField:(NSString *)fieldName value:(id)value{
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NSUserDefaults *defaus=[NSUserDefaults standardUserDefaults];
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[defaus setObject:value forKey:fieldName];
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[defaus synchronize];
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}
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+(id)getsaveLoacalField:(NSString *)fieldName{
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NSUserDefaults *defaus=[NSUserDefaults standardUserDefaults];
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return [defaus objectForKey:fieldName];
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}
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@end
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