Xcode：Objective-C：类型不匹配

Question

产品构建成功，但测试失败。我如何通过下面的STAssertEquals报告的类型不匹配失败？

// TransactionSpec.m 

#import "Transaction.h" 

@interface TransactionSpec : SenTestCase 
@end 

@implementation TransactionSpec 

#pragma mark Properties 

- (void)testProperties { 
    Transaction *transaction = [[Transaction alloc] init]; 
    transaction.type = TransactionTypePay; 

    STAssertNotNil(transaction, @"transaction exists"); 
    STAssertEquals(transaction.type, TransactionTypePay, @"type property works"); // Type mismatch 
} 

@end 

// Transaction.h 

typedef enum { 
    TransactionTypePay, 
    TransactionTypeCharge 
} TransactionType; 

@interface Transaction : NSObject 

@property (nonatomic) TransactionType *type; 

@end 

// Transaction.m 

#import "Transaction.h" 

@implementation Transaction 

@synthesize type; 

@end 

Answer 1

你type属性被声明为指针来枚举，这可能不应该这样

Answer 2

铸造transaction.type到TransactionType修复该问题：

STAssertEquals((TransactionType)transaction.type, TransactionTypePay, @"type property works"); 

可是，我为什么要必须这样做，因为我声明：

@property (nonatomic) TransactionType *type; 

Answer 3

您的type物业是指针到TransactionType（这可能不是预期的），而TransactionTypePay是一个实际的TransactionType。