不兼容的指针类型从“结构MYSTRUCT *”

Question

分配给“结构MYSTRUCT *”我想学习目标C。

这是在我的.m文件

@interface TetrisEngine() 
@property (nonatomic, readwrite) struct TetrisPiece *currPiece; 
@end 

struct TetrisPiece { 
    int name; 
    struct { 
     int colOff, rowOff; 
    } offsets[TetrisPieceRotations][TetrisPieceBlocks]; 
}; 

这下家伙的内容不应该是相关的。我假设返回值是所有你需要为了看助阵

static struct TetrisPiece pieces[TetrisNumPieces] = {...}; 

@implementation TetrisEngine 
@synthesize currPiece; 

- (void) nextPiece 
    currPiece = &pieces[ ((random() % (TetrisNumPieces * 113)) + 3) % TetrisNumPieces]; 

，这是我得到的错误：不兼容的指针类型从“结构TetrisPiece *”

分配给“结构TetrisPiece *”

Answer 1

文件VAR需要为C型指针，像这样明确声明...

@interface TetrisEngine() { 
    // added curly braces and this 
    struct TetrisPiece *currPiece; 
} 

@property (nonatomic, readwrite) struct TetrisPiece *currPiece; 
@end 

其余的将正常运行是。虽然我同意另一个答案，即有更多现代方法来声明oo中的结构。