iOS中在oc中制作一个霓虹灯

来源：互联网发布：飞歌导航端口和波特率编辑：程序博客网时间：2024/06/03 11:48

1.创建霓虹灯的布局图

command ＋ n 创建一个MyView的类

MyView.h文件中创建一个可变数组来接收所有的圆圈

<span style="font-size:18px;">(nonatomic,strong)NSMutableArray</span>

MyView.m文件中重写初始化方法：

<span style="font-size:24px;">- (instancetype)initWithFrame:(CGRect)frame</span>

<span style="font-size:24px;">{<span style="white-space:pre"></span></span>

<span style="font-size:24px;"><span style="white-space:pre"></span>self = [super initWithFrame:frame];</span>

<span style="font-size:24px;"><span style="white-space:pre"></span>if (self) {</span>

<span style="font-size:24px;"><span style="white-space:pre"></span>[self create];</span>

<span style="font-size:24px;"><span style="white-space:pre"></span>}</span>

<span style="font-size:24px;"><span style="white-space:pre"></span>return self</span>

<span style="font-size:24px;">}</span>

添加creat的实现方法：

创建视图

<span style="font-size:24px;">#pragma mark 创建视图- (void)creat{    for (int i = 0; i < 8; i++) {        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(i * 50, i * 50 , self.frame.size.width - 40 * i, self.frame.size.height - 40 * i)];        view.center = self.center;        view.backgroundColor = [UIColor blueColor];        view.layer.cornerRadius = (self.frame.size.width - 40 * i) / 2;        view.layer.borderWidth = 1;        [self addSubview:view];        [self.array addObject:view];    }}</span>

<span style="font-size:24px;">#pragma mark 懒加载数组.懒加载属于对象的get方法，如果在懒加载中跟使用点语法，程序就会进入循环调用。- (NSMutableArray *)array{    if (!_array) {        _array = [[NSMutableArray alloc] init];    }    return _array;}</span>

2.在ViewController.m文件中

@property (nonatomic,strong)MyView *myView;@property (nonatomic,strong)NSMutableArray *colorArray;

- (void)loadView{    [super loadView];    self.myView = [[MyView alloc] initWithFrame:CGRectMake(10, 100, 350, 350)];    self.view = self.myView;}

- (void)viewDidLoad {    [super viewDidLoad];#pragma mark 给视图的颜色赋值    for (int i = 0 ; i < self.myView.array.count; i++) {        UIView *view = self.myView.array[i];        UIColor *tempColor = self.colorArray[i];        view.backgroundColor = tempColor;    }    [NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(change) userInfo:nil repeats:YES];}

#pragma mark 懒加载数组颜色-(NSArray *)colorArray{    if (!_colorArray) {        UIColor *color1 = [UIColor redColor];        UIColor *color2 = [UIColor blueColor];        UIColor *color3 = [UIColor yellowColor];        UIColor *color4 = [UIColor orangeColor];        UIColor *color5 = [UIColor grayColor];        UIColor *color6 = [UIColor brownColor];        UIColor *color7 = [UIColor greenColor];        UIColor *color8 = [UIColor cyanColor];        self.colorArray = [@[color1,color2,color3,color4,color5,color6,color7,color8] mutableCopy];    }    return _colorArray;}

#pragma mark 颜色交换- (void)change{    for (int i = 0; i < 7; i++) {        UIView *tempView = self.myView.array[i];        UIColor *tempColor = tempView.backgroundColor;                tempColor = self.colorArray[i];        self.colorArray[i] = self.colorArray[i + 1];        self.colorArray[i + 1] = tempColor;        tempView.backgroundColor = self.colorArray[i];    }}

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