iOS开发报错 Cannot assign to 'self' outside of a method in the init family

在自定义初始化方法时发现有时会报错Cannot assign to 'self' outside of a method in the init family, 是因为Xcode会检查init的写法

屏幕快照 2020-03-31 下午7.50.55.png

错误写法
-(instancetype)tjInitWithFirstName:(NSString *)firstName andLastName:(NSString *)lastName andEmail:(NSString *)email andAge:(NSInteger)age{
    self = [super init];
    if (self) {
        _tjFirstName = firstName;
        _tjLastName = lastName;
        _tjEmail = email;
        _tjAge = age;
    }
    return self;
}

正确写法为把init前面的字母去掉，就可以了

-(instancetype)initWithFirstName:(NSString *)firstName andLastName:(NSString *)lastName andEmail:(NSString *)email andAge:(NSInteger)age{
    self = [super init];
    if (self) {
        _tjFirstName = firstName;
        _tjLastName = lastName;
        _tjEmail = email;
        _tjAge = age;
    }
    return self;
}