iOS 常用代码块

iOS 常用代码块：

@property (nonatomic, strong) <#Class#> * <#object#>;

@property (nonatomic, assign) <#Class#> <#object#>;

@property (nonatomic, copy) NSString * <#object#>;

@property (nonatomic, copy) void (^_Nullable <#block#>)(void);