iphone - RestKit 更新到 xcode 4.4.1 后出现警告

Question

当我将 Xcode 更新到 4.4.1 时，它给了我 22 个关于使用 RestKit 库的警告。错误是这样的:

Direct access to objective-c's isa is deprecated in favor of object_setClass() and object_getClass()

我通过替换修复了 18 个警告:

将 %lu 替换为 %u

将object->isa替换为object_getClass(object)

将 keyObject->isa 替换为 object_getClass(keyObject)

还有 4 个警告我无法修复它，以下是警告及其描述:

文件名1:RKManagedObjectMappingOperation.m 警告线1:

NSAssert(mapping, @"Attempted to connect relationship for keyPath '%@' without a relationship mapping defined.");

警告说明1:

more '%' conversations than data arguments

文件名2:RKReachabilityObserver.m 警告线2:

return [NSString stringWithFormat:@"<%@: %p host=%@ isReachabilityDetermined=%@ isMonitoringLocalWiFi=%d reachabilityFlags=%@>",
            NSStringFromClass([self class]), self, self.host, self.isReachabilityDetermined ? @"YES" : @"NO",
            self.isMonitoringLocalWiFi ? @"YES" : @"NO", [self reachabilityFlagsDescription]];

警告描述2:

format specifies type int but the argument has type NSString

文件名3:JSONKit.m 警告线3:

if(JK_EXPECT_F(((id)keys[idx])->isa != encodeState->fastClassLookup.stringClass) && JK_EXPECT_F([(id)keys[idx] isKindOfClass:[NSString class]] == NO)) { jk_encode_error(encodeState, @"Key must be a string object."); return(1); }

警告描述3:

Direct access to objective-c's isa is deprecated in favor of object_setClass() and object_getClass()

文件名4:NSManagedObject+ActiveRecord.m 警告行 4:

RKLogError(@"Property '%@' not found in %@ properties for %@", propertyName, [propDict count], NSStringFromClass(self));

警告描述4:

format specifies type id but the argument has type NSUInteger

如何解决？

Answer 1

警告1:

NSAssert(mapping, @"Attempted to connect relationship for keyPath '%@' without a relationship mapping defined.");

成为

NSAssert(mapping, @"Attempted to connect relationship for keyPath '%@' without a relationship mapping defined.", <<put the corresponding keyPath here >> );

或

NSAssert(mapping, @"Attempted to connect relationship for a keyPath without a relationship mapping defined.");

它说“比数据参数更多的‘%’对话”意味着你有占位符，在本例中是%@，但没有参数来填充它们。因此，要么提供参数，要么删除占位符。

警告2:

return [NSString stringWithFormat:@"<%@: %p host=%@ isReachabilityDetermined=%@ isMonitoringLocalWiFi=%d reachabilityFlags=%@>",
        NSStringFromClass([self class]), self, self.host, self.isReachabilityDetermined ? @"YES" : @"NO",
        self.isMonitoringLocalWiFi ? @"YES" : @"NO", [self reachabilityFlagsDescription]];

成为

return [NSString stringWithFormat:@"<%@: %p host=%@ isReachabilityDetermined=%@ isMonitoringLocalWiFi=%@ reachabilityFlags=%@>",
        NSStringFromClass([self class]), self, self.host, self.isReachabilityDetermined ? @"YES" : @"NO",
        self.isMonitoringLocalWiFi ? @"YES" : @"NO", [self reachabilityFlagsDescription]];

注意 isMonitoringLocalWiFi=%d 部分获取的是 %@ 而不是 %d，因为您提供了一个字符串参数但有一个整数占位符.

警告 3:抱歉，无法帮助您解决此问题。也许在我查看代码后我会发布更新。

更新:尝试更改

((id)keys[idx])->isa

到

object_getClass( ((id)keys[idx]) )

警告4:

RKLogError(@"Property '%@' not found in %@ properties for %@", propertyName, [propDict count], NSStringFromClass(self));

成为

RKLogError(@"Property '%@' not found in %d properties for %@", propertyName, [propDict count], NSStringFromClass(self));

请注意，第二个占位符应该是 %d 而不是 %@，因为您提供了一个整数，或者在本例中是一个 NSUInteger，即 [propDict count] 参数。