標籤:
由於app開發的需求,需要從api介面獲得json格式資料並儲存臨時的 app的佈景主題色彩 和 相關url
方案有很多種:
1, 通過AppDelegate儲存為全域變數,再擷取
2,使用NSUSerDefault
第一種 :通過AppDelegate方法:
定義全域變數
//// AppDelegate.h//// Created by MISSAJJ on 15/5/5.// Copyright (c) 2015年 MISSAJJ. All rights reserved.//#import <UIKit/UIKit.h> @interface AppDelegate : UIResponder <UIApplicationDelegate >@property (strong, nonatomic) UIWindow *window;@property (strong, nonatomic) NSString *globalAppThemeColor;@property (strong, nonatomic) NSString *globalAboutTag; @end
在AppDelegate.m 內賦值:
_globalAppThemeColor = appDetails.appThemeColor;_globalAboutTag = appDetails.about;
在需要的VC頭部匯入
#import "AppDelegate.h"
- (void)viewDidLoad { [super viewDidLoad]; //建立 AppDelegate * appDelegate=(AppDelegate*)[[UIApplication sharedApplication]delegate]; }
獲得變數
NSString *about = appDelegate.globalAboutTag;
NSString *theme = appDelegate.globalAppThemeColor;
靈活運用到代碼需求的地方
//navi設定為全域主題色self.navigationController.navigationBar.barTintColor = [UIColor colorWithHexString:appDelegate.globalAppThemeColor alpha:1];
====== I am 華麗麗的分割線 ^_^=======
第二種 :通過NSUserDefaults方法:
尋找了相關資料,自己整理了一份NSUserDefaults文摘給有共同有需求的程式猿朋友們.
一 ,NSUserDefaults 簡單的運用方法
NSUserDefaults一般可以存取一些短小的資訊,比如存入再讀出一個字串到NSUserDefaults
注意 : key值必須要相同才能讀取出來哦!
NSUserDefaults只支援: NSString, NSNumber, NSDate, NSArray, NSDictionary, 不是所有資料都能往裡放滴哦~
//儲存資料NSString *string = [NSString stringWithString @"我想儲存的字串內容"]; NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults]; [userDefaults setObject:string forKey:@"theme"];
//在儲存資料的地方,別忘了這一句 [[NSUserDefaults standardUserDefaults] synchronize];
//在需要的地方擷取資料NSString *getStringValue = [[NSUserDefaults standardUserDefaults] objectForKey:@"theme"];
二 , 如果需要儲存比較多得資料, 可以通過模型儲存和讀取
1.模型代碼
//// AreasModel.h////// Created by MISSAJJ on 15/5/7.// Copyright (c) 2015年 MISSAJJ. All rights reserved.//#import <Foundation/Foundation.h>@interface AreasModel : NSObject /* * about 模型 */@property (nonatomic,copy)NSString * about;@property (nonatomic,copy)NSString * appThemeColor; @end
記住必須要在 M 檔案 裡 寫這兩個方法
- (id) initWithCoder: (NSCoder *)coder
- (void) encodeWithCoder: (NSCoder *)coder
然後把該自訂的類對象編碼到 NSData中,再從NSUserDefaults中進行讀取。
//// AreasModel.m////// Created by MISSAJJ on 15/5/7.// Copyright (c) 2015年 MISSAJJ. All rights reserved.//#import "AreasModel.h"@implementation AreasModel- (id)initWithCoder:(NSCoder *)aDecoder{ if(self = [super init]) { self.about = [aDecoder decodeObjectForKey:@"about"]; self.appThemeColor = [aDecoder decodeObjectForKey:@"appThemeColor"]; } return self;}- (void)encodeWithCoder:(NSCoder *)aCoder{ [aCoder encodeObject:self.about forKey:@"about"]; [aCoder encodeObject:self.appThemeColor forKey:@"appThemeColor"]; }@end
2. 儲存資料的代碼
//////////////////////////
以上省略........
//////////////////////////
//URL編碼成UTF8 dirPath = [dirPath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSURL * dirUrl = [NSURL URLWithString:dirPath]; NSMutableURLRequest * dirRequest = [NSMutableURLRequest requestWithURL:dirUrl]; NSData *dirJsonData = [NSURLConnection sendSynchronousRequest:dirRequest returningResponse:nil error:nil]; NSDictionary *dirListJsonData = [NSJSONSerialization JSONObjectWithData:dirJsonData options:0 error:nil]; NSDictionary* dicData = [dirListJsonData objectForKey:@"data"]; #pragma mark ====儲存臨時主題和關於資訊==== NSString *about = [dicData objectForKey:@"about"]; NSString *theme = [dicData objectForKey:@"theme"]; //建立模型 AreasModel *themeAndAbout = [[AreasModel alloc] init]; themeAndAbout.about = about; themeAndAbout.appThemeColor = theme; //儲存資料,用歸檔儲存到NSUserDefault NSData *themeAndAboutData = [NSKeyedArchiver archivedDataWithRootObject:themeAndAbout]; [[NSUserDefaults standardUserDefaults] setObject:themeAndAboutData forKey:@"themeAndAbout"]; [[NSUserDefaults standardUserDefaults] synchronize];
3. 擷取資料代碼
//獲得儲存資料 NSData *getthemeAndAboutData = [[NSUserDefaults standardUserDefaults] objectForKey:@"themeAndAbout"];
//轉成模型擷取資料 AreasModel *getThemeAndAbout = [NSKeyedUnarchiver unarchiveObjectWithData:getthemeAndAboutData]; NSLog(@"%@,%@",getThemeAndAbout.appThemeColor, getThemeAndAbout.about);
====心靈和身體,總有一個在路上=== ====只要還在路上,就不至於後退===
[MISS靜IOS開發原創文摘]-AppDelegate儲存全域變數和 NSUserDefaults standardUserDefaults 通過模型儲存和讀取資料,儲存自訂的對象