#import "AppDelegate.h"app
@interface AppDelegate ()ide
@end spa
@implementation AppDelegate.net
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {3d
// Override point for customization after application launch.orm
_window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];继承
[_window setBackgroundColor:[UIColor whiteColor]];图片
//======================================get
UIView *view = [[UIView alloc]initWithFrame:animation
CGRectMake(100, 100, 100, 100)];
//系统提供的全部的视图类都是直接或者间接继承自UIView
//能够显示内容
//显示内容的实质是由于UIView类中提供了不一样的draw方法;
//全部的视图都有形状,形状是由layer决定的;每一个视图都有layer;
//若是想要改变视图的形状,必须经过layer去改变;
view.backgroundColor = [UIColor orangeColor];
//2.切圆角
//参数就是圆角半径
[view.layer setCornerRadius:50];
//切圆角若是是带切图片的控件,必须带上如下代码有效
view.layer.masksToBounds = YES;
//3.画边框
//设置边框宽度
view.layer.borderWidth = 2;
//设置边框颜色
[view.layer setBorderColor:[UIColor greenColor].CGColor];
[UIView animateWithDuration:2 animations:^{
//view.frame = CGRectMake(100, 100, 50, 50);
//若是设置了layer就不能经过frame改变视图的大小,
//只能经过形变去改变大小
view.transform = CGAffineTransformMakeScale(0.5, 0.5);
}];
[_window addSubview:view];
[_window makeKeyAndVisible];
return YES;
}