首先對於之前寫的文章自己沒有用真機測試,以及這段時間大家加我的QQ或者私信我也好,有的甚至找到了我的旺旺上,但是我沒有給大家及時回覆很抱歉。
進入正題,我之後又試了下自己寫的方法,發現用模擬器可以,但是真機不可以。
真機卸載後和之前獲取的uuid不同,究其原因就是之前生成的uuid並沒有被keychain成功存儲。
所以問題在keychain.我之前給大家的KeychainItemWrapper類是蘋果官方的,但是有些朋友反映運行時會崩潰。
除此之外,Code Signing Entitlements的創建方法也不夠嚴謹。
所以,請大家重新跟我走一遍吧。
1.新建一個工程,看一下自己的Bundle Id.這個Bundle Id 要和你用真機測試時的證書上面的Bundle Id相匹配。
比如我的是 house.xianrou.xianrou
2.Target - Capabilities - Keychain Sharing - ON
這步主要目的是打開Keychain Sharing,將它由灰色狀態的OFF改爲藍色狀態的ON。
打開之後的變化如下:
左側的目錄會自動生成Entitlements文件,不需要自己創建了。
也就是說,Bundle Identifier、Keychain Sharing的Keychain Groups、Entitlements文件的Keychain Access Groups的第一個元素,它們要保持上圖所示的一致性。
設置好了以後可以運行下程序,沒問題可以進行下一步。
3.傳說中的uuid類和keychain類來啦
既然蘋果的keychain方法會崩潰而且有些複雜,我們只保存一個uuid的話可以用下面的簡單方法:
(這也是我自己百度的keychain拷貝別人的,然後改改)
UUID.h
#import 尖括號(Foundation/Foundation.h)
@interface UUID : NSObject
+(NSString *)getUUID;
@end
UUID.m
#import "UUID.h"
#import "KeyChainStore.h"
@implementation UUID
+(NSString *)getUUID
{
NSString * strUUID = (NSString *)[KeyChainStore load:@"com.company.app.usernamepassword"];
//首次執行該方法時,uuid爲空
if ([strUUID isEqualToString:@""] || !strUUID)
{
//生成一個uuid的方法
CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
strUUID = (NSString *)CFBridgingRelease(CFUUIDCreateString(kCFAllocatorDefault,uuidRef));
//將該uuid保存到keychain
[KeyChainStore save:KEY_USERNAME_PASSWORD data:strUUID];
}
return strUUID;
}
@end
KeyChainStore.h
#import 尖括號(Foundation/Foundation.h)
@interface KeyChainStore : NSObject
+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)deleteKeyData:(NSString *)service;
@end
KeyChainStore.m
#import "KeyChainStore.h"
@implementation KeyChainStore
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(id)kSecClassGenericPassword,(id)kSecClass,
service, (id)kSecAttrService,
service, (id)kSecAttrAccount,
(id)kSecAttrAccessibleAfterFirstUnlock,(id)kSecAttrAccessible,
nil];
}
+ (void)save:(NSString *)service data:(id)data {
//Get search dictionary
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
//Delete old item before add new item
SecItemDelete((CFDictionaryRef)keychainQuery);
//Add new object to search dictionary(Attention:the data format)
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];
//Add item to keychain with the search dictionary
SecItemAdd((CFDictionaryRef)keychainQuery, NULL);
}
+ (id)load:(NSString *)service {
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
//Configure the search setting
//Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];
[keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
} @catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@", service, e);
} @finally {
}
}
if (keyData)
CFRelease(keyData);
return ret;
}
+ (void)deleteKeyData:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((CFDictionaryRef)keychainQuery);
}
@end
#ifndef PrefixHeader_pch
#define PrefixHeader_pch
#define KEY_USERNAME_PASSWORD @"com.company.app.usernamepassword"
#define KEY_USERNAME @"com.company.app.username"
#define KEY_PASSWORD @"com.company.app.password"
#endif
$(SRCROOT)/$(PROJECT_NAME)/PrefixHeader.pch
,其中$(PROJECT_NAME)
是相對工程名,比上面的方法更便捷.5.在viewcontroller.m裏面執行如下代碼
NSString * uuid= [UUID getUUID];
NSLog(@"uuid=%@",uuid);