KVC访问非对象属性

typedef struct {
    float x, y;
} TestFloats;

@interface TestPerson : NSObject
@property (nonatomic) TestFloats tFloats;
@end

@implementation TestPerson
@end

//KVC 访问非对象属性
    TestPerson *person = [[TestPerson alloc] init];
    TestFloats floatT = {1.2,1.4};
    NSValue *value = [NSValue valueWithBytes:&floatT objCType:@encode(TestFloats)];
    [person setValue:value forKey:@"tFloats"];
    
    NSValue *value1 = [person valueForKey:@"tFloats"];
    
    NSLog(@"%@",value1);
    
    TestFloats tt;
    [value1 getValue:&tt];
    NSLog(@"%f-%f",tt.x,tt.y);