ios纯代码实现小飞机移动

#import "ViewController.h"

 

@interface ViewController ()

 

@end

 

@implementation ViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    //调用设置界面方法

    [self setupUI];

}

 

//布置界面方法

#pragma mark - 布置界面

- (void)setupUI{

    //放背景图片

    //实例化一个视图

    UIImageView *backgroundImageView=[[UIImageView alloc] init];

    //设置视图大小

    backgroundImageView.frame=self.view.frame;

    //设置背景图片,放入视图中

    backgroundImageView.image=[UIImage imageNamed:@"background"];

    [self.view addSubview:backgroundImageView];

    

    

    //放置飞机

    //实例化一个按钮

    UIButton *plane=[[UIButton alloc] init];

    //定义两个图片

    UIImage *planeNomal=[UIImage imageNamed:@"hero1"];

    UIImage *planeHighlight=[UIImage imageNamed:@"hero2"];

    //将两张图片设置到按钮上,对应两种状态

    [plane setImage:planeNomal forState:UIControlStateNormal];

    [plane setImage:planeHighlight forState:UIControlStateHighlighted];

    //按照图片大小调整按钮大小

    [plane sizeToFit];

    //将飞机放到根视图中央

    plane.center=self.view.center;

    //将按钮添加到根视图

    [self.view addSubview:plane];

    //放按钮

    //定义偏移量

    CGFloat offset=40;

    [self addDirButtonWithImageName:@"top" andOffsetPoint:CGPointMake(0, -offset)];

    [self addDirButtonWithImageName:@"bottom" andOffsetPoint:CGPointMake(0, +offset)];

    [self addDirButtonWithImageName:@"left" andOffsetPoint:CGPointMake(-offset, 0)];

    [self addDirButtonWithImageName:@"right" andOffsetPoint:CGPointMake(+offset, 0)];

    

}

 

//方向按钮生成方法

#pragma mark - 生成方向按钮

- (void)addDirButtonWithImageName:(NSString *)imageName andOffsetPoint:(CGPoint)offsetPoint{

    //设置按钮的长宽

    CGFloat width=40;

    CGFloat height=40;

    

    //定义一个点表示四个按钮的中心点

    CGPoint rect=CGPointMake(self.view.center.x, self.view.center.y+200);

    CGRect center=CGRectMake(rect.x-width*0.5, rect.y-height*0.5, width, height);

    

    //实例化一个按钮

    UIButton *dirButton=[[UIButton alloc] init];

    //设置按钮的大小和位置

    dirButton.frame=CGRectOffset(center, offsetPoint.x, offsetPoint.y);

    //根据参数生成图片名

    NSString *nName=[imageName stringByAppendingString:@"_normal"];

    NSString *hName=[imageName stringByAppendingString:@"_highlighted"];

    //定义两个图片对象

    UIImage *dirNormal=[UIImage imageNamed:nName];

    UIImage *dirHighlighted=[UIImage imageNamed:hName];

    //根据图片名将图片对象赋值给对应状态下的按钮

    [dirButton setImage:dirNormal forState:UIControlStateNormal];

    [dirButton setImage:dirHighlighted forState:UIControlStateHighlighted];

    //将按钮添加到根视图

    [self.view addSubview:dirButton];

    

}

 

 

@end

 

转载于:https://www.cnblogs.com/baics/p/5375319.html