代码：
// Add the password to the dictionary, converting from NSData to NSString.
NSString *password = [[[NSString alloc] initWithBytes:[passwordData bytes] length:[passwordData length]
encoding:NSUTF8StringEncoding] autorelease];
[returnDictionary setObject:password forKey:(id)kSecValueData];
出错：
ARC forbids explicit message send of ‘autorelease’
如图：
搜：
encoding NSUTF8StringEncoding ARC forbids explicit message send of ‘autorelease’
iOS编程过程中出错：’autorelease’ is unavailable
ios开发之路十一（ARC forbids explicit message send of ‘autorelease’错误） – Lves Li – 博客园
还是使用ARC，
去改为：
// NSString *password = [[[NSString alloc] initWithBytes:[passwordData bytes] length:[passwordData length]
// encoding:NSUTF8StringEncoding] autorelease];
NSString *password = [[[NSString alloc] initWithBytes:[passwordData bytes] length:[passwordData length]
encoding:NSUTF8StringEncoding] init];
即可。
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