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完全靠代码生成的ios版hello,world
xcode5 运行在iphone retain 3.5" 模式下(即对应iphone4, iphone4s)需要开启ARC
//// main.m// Hello//// Created by lishujun on 14-8-28.// Copyright (c) 2014年 lishujun. All rights reserved.//#import <UIKit/UIKit.h>// 视图控制器对象@interface HelloWorldViewController : UIViewController@end@implementation HelloWorldViewController-(void) loadView{ //创建视图对象 UIView *contentView = [[UIView alloc]initWithFrame:[[UIScreen mainScreen] applicationFrame]]; contentView.backgroundColor = [UIColor lightGrayColor]; self.view = contentView; //创建label对象 UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0.0, 0.0, 320.0, 30.0)]; label.text = @"Hello World"; label.center = contentView.center; // 垂直居中 label.textAlignment = UITextAlignmentCenter; // 水平居中 label.backgroundColor = [UIColor clearColor]; label.textColor = [UIColor redColor]; //在视图上添加label [contentView addSubview:label];}@end// 委托对象@interface HelloWorldAppDelegate : NSObject <UIApplicationDelegate>{ IBOutlet UIWindow *window;}@property (nonatomic, retain) UIWindow *window;//必须声明为属性,声明为局部变量则无法绘制视图,显示为黑屏@end@implementation HelloWorldAppDelegate@synthesize window;-(void) applicationDidFinishLaunching:(UIApplication *)application{ self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]bounds]]; HelloWorldViewController *viewController = [[HelloWorldViewController alloc]init]; self.window.rootViewController = viewController; [self.window makeKeyAndVisible];}@end// 程序入口int main(int argc, char * argv[]){ @autoreleasepool { return UIApplicationMain(argc, argv, nil, @"HelloWorldAppDelegate"); }}
完全靠代码生成的ios版hello,world
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