如何修复不兼容的块指针类型发送错误

Question

构建失败，因为不兼容的块指针类型发送错误。

- (void)loadAndConfigureWithCompletion:(void (^ _Nonnull)(BOOL, NSError * _Nullable))completion;

[SkyIdConfigure.shared loadAndConfigureWithCompletion:^(BOOL *isConfigured,NSError *error){
    if (error) {
    }
    if (isConfigured) {
    }
}];

我有这个错误！！

Incompatible block pointer types sending 'int (^)(BOOL *, NSError * _Nullable)' to parameter of type 'void (^ _Nonnull)(BOOL, NSError * _Nullable)' Incompatible block pointer types sending 'void (^)(BOOL *, NSError *)' to parameter of type 'void (^ _Nonnull)(BOOL, NSError * _Nullable)'

Answer 1

我们来看一条错误信息！

小提示，将预期和当前放在另一个之上，会更容易发现差异。当我无法发现差异时，我会这样做。

Incompatible block pointer types sending 'void (^)(BOOL *, NSError *)' to parameter of type 'void (^ _Nonnull)(BOOL, NSError * _Nullable)'

=>

Incompatible block pointer types sending 
'void (^)(BOOL *, NSError *)' 
to parameter of type 
'void (^ _Nonnull)(BOOL, NSError * _Nullable)'

=>

'void (^)(BOOL *, NSError *)'                  //You wrote
'void (^ _Nonnull)(BOOL, NSError * _Nullable)' //Expected

=>

'void (^         )(BOOL *, NSError *          )' //You wrote
'void (^ _Nonnull)(BOOL  , NSError * _Nullable)' //Expected
                        ^
                        |____________________________
                                                     |

Nonnull/Nullable，这是一回事，但您注意到布尔值的额外 * 了吗？你有一个指针，你直接有值。

[SkyIdConfigure.shared loadAndConfigureWithCompletion:^(BOOL *isConfigured, NSError *error) {
}];

=>

[SkyIdConfigure.shared loadAndConfigureWithCompletion:^(BOOL isConfigured, NSError *error) {
}];

如何修复不兼容的块指针类型发送错误

How to fix the Incompatible block pointer types sending error

ios

objective-c

xcode

objective-c-blocks