//uiwindow创建的四个步骤 //(1)给大小 self.window = [[UIWindow alloc]initWithFrame:...

//UIview给大小 UIView *redview = [[UIView alloc]initWithFrame:CGRectMake(20...

UIlable //设置lable上的字 lable.text = @"zhang"; //设置lable中心对齐 lable.textAlig...

#import "ViewController.h" @interface ViewController () @end @implementa...

#import "ViewController.h" @interface ViewController () @property(nonato...

#import "ViewController.h"#import#import "Teacher.h" #import "Student.h"...

#import "databasehandle.h" #import@interface databasehandle () /**用来存放数据...

import Foundationprint("Hello, World!") //在swift中使用print输出 //1.定义一个(常量le...

#import "ViewController.h" @interface ViewController () @end @implementa...