objective-c - 将 NsNumber 转换为 nsString 时的 Objective C 错误

Question

NSNumber *abc = [[NSNumber alloc] initWithInt:123];
NSString *number = [NSString stringWithFormat:@"%d", abc];

结果number是31619！如何解决？

Answer 1

您必须返回一个 intValue：

NSNumber *abc = [[NSNumber alloc] initWithInt:123];
NSString *number = [NSString stringWithFormat:@"%i", [abc intValue]];

Answer 2

这不是客观的 C 错误，您使用了错误的说明符-

采用 -

NSString *number = [NSString stringWithFormat:@"%@", abc];