ios KeyChain项目中应用到的内容
.h
#import <Foundation/Foundation.h>
#import <Security/Security.h>
@interface CHKeyChain : NSObject
+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)delete:(NSString *)service;
@end
.m
#import "CHKeyChain.h"
@implementation CHKeyChain
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionarydictionaryWithObjectsAndKeys:
(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:[NSKeyedArchiverarchivedDataWithRootObject: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)kSecMatchLimitOneforKey:(id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(NSData *)keyData];
} @catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@", service, e);
} @finally {
}
}
if (keyData)
CFRelease(keyData);
return ret;
}
+ (void)delete:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((CFDictionaryRef)keychainQuery);
}
调用类，使用方法：
NSString * const KEY_USERNAME_PASSWORD = @"com.company.app.usernamepassword";
NSString * const KEY_USERNAME = @"com.company.app.username";
NSString * const KEY_PASSWORD = @"com.company.app.password";
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSMutableDictionary *usernamepasswordKVPairs = (NSMutableDictionary *)[CHKeyChain load:KEY_USERNAME_PASSWORD];
// txtfldUsername.text = [usernamepasswordKVPairs objectForKey:KEY_USERNAME];
// txtfldPassword.text = [usernamepasswordKVPairs objectForKey:KEY_PASSWORD];
if (indexPath.section == 0) {
static NSString *TableViewCell = @"TableViewCell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier: TableViewCell];
if (cell == nil) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier: TableViewCell] autorelease];
}
// for (UIView * v in [cell.contentView subviews]) {
// [v removeFromSuperview];
// }
NSUInteger row = [indexPath row];
NSString *title = [nameList objectAtIndex:row];
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, 80, 42)];
[label setText:title];
[label setBackgroundColor:[UIColorclearColor]];
[cell.contentView addSubview:label];
if (row==0) {
//user name
if (self.mNameField == NULL) {
UITextField *content = [[UITextField alloc]initWithFrame:CGRectMake(80, 10, 220, 30)];
[content setBackgroundColor:[UIColor clearColor]];
content.delegate = self;
content.text = [usernamepasswordKVPairs objectForKey:KEY_USERNAME];
content.clearButtonMode = UITextFieldViewModeAlways;
self.mNameField = content;
[content release];
}
[cell.contentView addSubview:self.mNameField];
}else if ( row == 1){
//password
if (self.mPasswordField == NULL) {
UITextField *content = [[UITextField alloc]initWithFrame:CGRectMake(80, 10, 220, 30)];
[content setBackgroundColor:[UIColor clearColor]];
content.secureTextEntry = YES;
content.delegate = self;
content.text = [usernamepasswordKVPairs objectForKey:KEY_PASSWORD];
content.clearButtonMode = UITextFieldViewModeAlways;
self.mPasswordField = content;
[content release];
}
[cell.contentView addSubview:self.mPasswordField];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
[label release];
return cell;
}
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCellalloc] initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:CellIdentifier];
}
NSString *title = @"注册成为海航用户";
cell.textLabel.text = title;
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
return cell;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
if (nil != BusyAlert)
[BusyAlertdismissWithClickedButtonIndex:0animated:YES];
downloadedBytes = totalBytes;
NSLog(@"connectionDidFinishLoading");
NSString *tempString = [[NSStringalloc] initWithData: downloadedDataencoding:NSUTF8StringEncoding];
NSLog(@"tempString:%@",tempString);
NSMutableDictionary *dic = [tempString JSONValue];
NSLog(@"dic:%@",dic);
if ([[dic allKeys] containsObject:@"access_token"]) {
[CHKeyChaindelete:KEY_USERNAME_PASSWORD];
NSString *partnerCodeString = [NSString stringWithFormat:@"%@",[dic objectForKey:@"access_token"]];
self.flagToken = partnerCodeString;
NSLog(@"self.flagToken:%@",self.flagToken);
NSMutableDictionary *usernamepasswordKVPairs = [NSMutableDictionary dictionary];
[usernamepasswordKVPairs setObject:mNameField.text forKey:KEY_USERNAME];
[usernamepasswordKVPairs setObject:mPasswordField.text forKey:KEY_PASSWORD];
[CHKeyChain save:KEY_USERNAME_PASSWORD data:usernamepasswordKVPairs];
AccountCenterViewController * accountcenter = [[AccountCenterViewControlleralloc] init];
[self.navigationController pushViewController:accountcenter animated:YES];
}
else {
NSString *partnerCodeString = [NSString stringWithFormat:@"%@",[dic objectForKey:@"error"]];
UIAlertView* alert = [[UIAlertViewalloc] initWithTitle:@"提示"message:partnerCodeString delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil, nil];
[alert show];
[alert release];
}
downloadedData = nil;
}
http://www.cnblogs.com/zhengyn/archive/2012/08/29/2662657.html#top