如何访问公共方法目标c中的属性

Question

我已经创建了一个类，并试图访问公共方法内部的一些属性，但我做不到，编译器不允许，我真的需要一些帮助。这是我的密码，我指望你们。有其他方法吗？

.h文件

@interface DirController : NSObject

+ (void)startCreate;
+(DirController *)getInstace;

@property (strong, nonatomic) NSString * nomeDiretorio;
@property (strong, nonatomic) NSString * enderecoUrl;
@property (strong, nonatomic) NSString * nomeUsuario;
@property (strong, nonatomic) NSString * senha;
//@property (strong, nonatomic) NSString * nomeCliente;
@property (nonatomic, assign, readonly ) BOOL              isCreating;
@property (nonatomic, strong, readwrite) NSOutputStream *  networkStream;

.m文件

+ (void)startCreate
{
BOOL                    success;
NSURL *                 url;
//  assert(self.networkStream == nil);      // don't tap create twice in a row!
// First get and check the URL.
url = [[NetworkManager sharedInstance] smartURLForString:self.enderecoUrl];
success = (url != nil);
if (success) {
url = CFBridgingRelease(
CFURLCreateCopyAppendingPathComponent(NULL, (__bridge CFURLRef) url, (__bridge CFStringRef) self.nomeDiretorio, true)
);
success = (url != nil);
}
// If the URL is bogus, let the user know.  Otherwise kick off the connection.
if ( ! success) {
} else {

self.networkStream = CFBridgingRelease(
CFWriteStreamCreateWithFTPURL(NULL, (__bridge CFURLRef) url)
);
assert(self.networkStream != nil);
if ([self.nomeUsuario length] != 0) {
success = [self.networkStream setProperty:self.nomeUsuario forKey:(id)kCFStreamPropertyFTPUserName];
assert(success);
success = [self.networkStream setProperty:self.senha forKey:(id)kCFStreamPropertyFTPPassword];
assert(success);
}
self.networkStream.delegate = self;
[self.networkStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[self.networkStream open];
// Tell the UI we're creating.
[self createDidStart];
}
}

Answer 1

这是因为方法startCreate不是实例方法，它是类方法。不能访问类方法内部的实例变量。

您可以将starCreate方法更改为实例方法，方法是将方法开头的+号替换为-号(假设您知道自己在做什么)。

Answer 2

类方法就是这样；类上的方法。没有可在其中存储状态的实例。

您需要创建一个类的实例(即MyClass *myThing = [[MyClass alloc] init];，将类方法转换为实例方法，然后它就会正常工作