UI基础之UIViewController
每个应用程序的window对象都有且只有一个根控制器
每一个视图控制器都自带一个view
UIViewController是所有控制器的根控制器
#pragma mark - 定时器调用方法
- (void)move{
//获取当前视图子视图
UIView * view= [self.view viewWithTag:101];
//获取原来的x值
CGFloat x=view.frame.origin.x;
//当x超界限了,将方向变为后退
if (x>kWidth-50) {
_direction=1;
}
//当x<=0了,将方向变为前进
if (x<=0) {
_direction=0;
}
//根据方向判断当前是前进还是后退
if(_direction==1){
view.frame=CGRectMake(x-3, 20, 50, 50);
}else{
view.frame=CGRectMake(x+3, 20, 50, 50);
}
#import "ViewController.h"
#define kWidth [UIScreen mainScreen].bounds.size.width
#define kHeight [UIScreen mainScreen].bounds.size.height
#define randomColor() [UIColor colorWithRed:arc4random()%10*0.1 green:arc4random()%10*0.1 blue:arc4random()%10*0.1 alpha:1]
@interface ViewController ()
@end
@implementation ViewController{
NSInteger _directionX;
NSInteger _directionY;
NSTimer *_timer;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//根视图,相当于rootview
// 每个应用程序的window对象都有且只有一个根控制器
// 每一个视图控制器都自带一个view
self.view.backgroundColor=[UIColor redColor];
//增加一个视图
UIView *view1=[[UIView alloc] initWithFrame:CGRectMake(0, 20, 50,50)];
view1.backgroundColor=[UIColor blackColor];
view1.layer.cornerRadius=25;
view1.tag=1001;
// view1.layer.borderColor=[UIColor whiteColor].CGColor;
// view1.layer.borderWidth=2;
//
[self.view addSubview:view1];
}
x,y轴移动弹动
-(void) move{
//获取当前视图的子视图
UIView *view=[self.view viewWithTag:1001];
//获取原来的x坐标
CGFloat x=view.frame.origin.x;
CGFloat y=view.frame.origin.y;
//当越界时要往回走x轴
// _directionX=1往前走, _directionX=0往回走
if (x>kWidth-50) {
_directionX=0;
}else if(x<=0){
_directionX=1;
}
//当越界时要往回走y轴
// _directionY=1往下走, _directionY=0往上走
if (y>kHeight-50) {
_directionY=0;
}else if(y<=20){
_directionY=1;
}
//根据方向判断走向x
if (_directionX==1&&_directionY==1) {
view.frame=CGRectMake(x+3, y+3, 50, 50);
view.backgroundColor=[UIColor whiteColor];
}
if (_directionX==1&&_directionY==0) {
view.frame=CGRectMake(x+3, y-3, 50, 50);
view.backgroundColor=[UIColor brownColor];
}
if (_directionX==0&&_directionY==0) {
view.frame=CGRectMake(x-3, y-3, 50, 50);
view.backgroundColor=[UIColor grayColor];
}
if (_directionX==0&&_directionY==1) {
view.frame=CGRectMake(x-3, y+3, 50, 50);
view.backgroundColor=[UIColor blackColor];
}
}
#pragma mark - 定时器调用方法
- (void)move{
//获取当前视图子视图
UIView * view= [self.view viewWithTag:101];
//获取原来的x值
CGFloat x=view.frame.origin.x;
//获取原来的y值
CGFloat y=view.frame.origin.y;
//当x超界限了,将方向变为后退
if (x>kWidth-50) {
_directionX=1;
view.backgroundColor=randomColor();
}
//当Y超界限了,将方向变为后退
if (y>kHeight-50) {
_directionY=1;
view.backgroundColor=randomColor();
}
//当x<=0了,将方向变为前进
if (x<=0) {
_directionX=0;
view.backgroundColor=randomColor();
}
//当y<=0了,将方向变为前进
if (y<=20) {
_directionY=0;
view.backgroundColor=randomColor();
}
//根据方向判断当前是前进还是后退
//计算当前X值应该是多少
CGFloat nowX=0;
if (_directionX==0) {
nowX=x+3;
}else{
nowX=x-3;
}
//计算当前Y值应该是多少
CGFloat nowY=0;
if (_directionY==0) {
nowY=y+3;
}else{
nowY=y-3;
}
view.frame=CGRectMake(nowX, nowY, 50, 50);
}
//点击时开始或停止
- (void) touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//如果定时器对象为空,则重新启动定时器,如果定时器对象不为空,则让定时器失效 (invalidate方法)
if (_timer==nil) {
//开启定时器
_timer=[NSTimer scheduledTimerWithTimeInterval:0.04 target: self selector:@selector(move) userInfo:nil repeats:YES];
}else {
[_timer invalidate];
_timer=nil;
}
}
//到边界就隐藏 边界是以view1
// view1.clipsToBounds=YES;
#import "JRModalViewController.h"
#import "JRViewController.h"
@interface JRModalViewController ()
@end
@implementation JRModalViewController
- (void)viewDidLoad {
[super viewDidLoad];
//1 加载视图
[self setViews];
}
#pragma mark - 加载子视图
- (void) setViews{
//1 添加按钮
self.view.backgroundColor=[UIColor grayColor];
UIButton * button=[[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 45)];
[button setTitle:@"确定" forState:UIControlStateNormal];
button.backgroundColor=[UIColor redColor];
//通过中心点居中视图
button.center=self.view.center;
button.layer.cornerRadius=20;
[button addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
//2 添加背景图
UIImage * image=[UIImage imageNamed:@"08.jpg"];
self.view.backgroundColor=[UIColor colorWithPatternImage:image];
}
#pragma mark - 点击事件
- (void) click{
//初始化小球控制器
JRViewController * vc=[[JRViewController alloc] init];
[vc setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentViewController:vc animated:YES completion:^{
NSLog(@"展示出来了");
}];
}
@end