In objective-c, I created a category, like
@interface NSArray <__covariant ObjectType> (ppEx)
@end
Look at this ObjectType, I wrote a method like
- (NSArray *)pp_map:(id(^)(ObjectType element))block;which act like the map function in Swift.
you can call it like
NSArray <NSString *>*values = @[@"1", @"2", @"3", @"4"];
NSArray *valueMap = [values pp_map:^id _Nonnull(NSString * _Nonnull element) {
return [NSString stringWithFormat:@"Hello %@", element];
}];
Now I need to add a property like mapBlock, I want to realize the same func;
@property (nonatomic, copy) NSArray *(^mapBlock)(id(^paramBlock)(ObjectType element));
I did it. But when I call this method in Xcode, it can't complete automatically.
values.mapBlock(^id _Nonnull(ObjectType _Nonnull element) {
})
It's unable to recognize type NSString, and always show ObjectType which can cause error. I can manually change it to NSString, but it's too complicated.
I think it's a problem of Xcode. Can anybody help me?
CleverPeng
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