返回指向塊的指針

Question

我在類內部有一個靜態塊變量。我怎樣才能聲明一個屬性或實例選擇器來返回或發送該塊給調用者？

這是我的靜態塊：

static NSResultComparison(^myBlock)(id obj1, id obj2); 

Answer 1

這將是最好的typedef您的塊。

//interface.h 
typedef NSResultComparison (^ComparisonBlock)(id obj1, id obj2); 

@interface ... 
... 

-(ComparisonBlock) getComparisonBlock; 

@end 

---

//implementation.m 
//Here is your static block implementation 
static ComparisonBlock myStaticBlock = ^(id obj1, id obj2) 
{ 
    ... 
    return result; 
}; 

@implementation ... 

-(ComparisonBlock)getComparisonBlock 
{ 
    return myStaticBlock; 
} 

@end