iOS学习day6

Posted 2020-06-09

1、计时器的使用

 [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(flyAction) userInfo:nil repeats:YES];

 

2、随机数的使用

arc4random()

 

3、UIWindow部分代码（xib）

//UIScreen

CGRect rect = [UIScreen mainScreen].bounds;

//创建UIWindow

self.window = [[UIWindow alloc] initWithFrame:rect];

//设置背景颜色

self.window.backgroundColor = [UIColor blackColor];

//设置keyWindow,并使其可见

[self.window makeKeyAndVisible];

//添加主控制器

ViewController * vc = [[ViewController alloc] init];

self.window.rootViewController = vc;

 

4、UIView部分代码

//将v置为最前端

[self.view bringSubviewToFront:v];

//将v置为最后端

[self.view sendSubviewToBack:v];

//从父视图删除子视图

[v removeFromSuperview];

5、计算Label的高度(核心代码)

CGRect rect = [string boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil];

 

6、自适应(核心代码)

(1)sizeToFit

UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, 17, 0)];

label.text = string;

label.numberOfLines = 0;

//使用sizeToFit一定要设置宽度

[label sizeToFit];

 

(2)sizeThatFits:

UILabel * label = [[UILabel alloc] init];

label.text = string;

label.numberOfLines = 0;

label.backgroundColor = [UIColor greenColor];

CGSize size = [label sizeThatFits:CGSizeMake(self.view.frame.size.width - 40, MAXFLOAT)];

label.frame = CGRectMake(20, 50, size.width, size.height);

[self.view addSubview:label];

7、UIImage部分代码

 

(1)本目录下的位置

 

//Resource:文件名 

//ofType:文件名后缀

//inDirectory:Bundle下的目录

NSString * path =[[NSBundle mainBundle] pathForResource:@"test" ofType:@"plist" inDirectory:@"image"];

 

(2)简易拉伸

UIImage* image = [UIImage imageNamed:@"backgroundImage”];//有缓存

    

UIImageView* imageView =[[UIImageView alloc]initWithImage:image];

    

UIEdgeInsets inset = UIEdgeInsetsMake(6 , 6, 6, 6);

    

image = [image resizableImageWithCapInsets:inset resizingMode:UIImageResizingModeStretch];

    

imageView.image = image;

    

imageView.frame = CGRectMake(20, 20, self.view.frame.size.width-40, 30);

 

[self.view addSubview:imageView];

 

(3)圆切

 

imageView.layer.cornerRadius = 10

//隐藏圆外的东西

imageView.layer.masksToBounds = YES;、//隐藏

imageView.clipsToBounds = YES;//切掉

//设置边线宽度

imageView.layer.borderWidth = 4 ;

//设置边线颜色

imageView.layer.borderColor = [UIColor blackColor].CGColor;

//设置阴影颜色

imageView.layer.shadowColor = [UIColor greenColor].CGColor;

//设置阴影大小

imageView.layer.shadowOffset = CGSizeMake(2, 2);

//设置不透明度

imageView.layer.shadowOpacity = 0.3;

(4)动画

NSMutableArray * array = [NSMutableArray array];

 

for (int i = 1; i < 6; i++) {

   NSString * string = [NSString stringWithFormat:@"hehua0%d",i];

   UIImage * image = [UIImage imageNamed:string];

   [array addObject:image];

}

imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];

//设置动画图片

imageView.animationImages = array;

//动画时间

imageView.animationDuration = 1;

//动画播放重复次数，值为0时，无限循环

imageView.animationRepeatCount = 0;

//开始动画

[imageView startAnimating];

[self.view addSubview:imageView];

8、UIButton部分代码

(1)Button实现图上字下(核心代码)

- (instancetype)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        

        self.imageView.contentMode = UIViewContentModeBottom;

        self.titleLabel.textAlignment = NSTextAlignmentCenter;

        self.titleLabel.font = [UIFont systemFontOfSize:20];

        

    }

    return self;

}

 

- (CGRect)imageRectForContentRect:(CGRect)contentRect {

    

    CGFloat ponitX = 0;

    CGFloat ponitY = 0;

    CGFloat width = contentRect.size.width;

    CGFloat height = contentRect.size.height * kScale;

    

    return CGRectMake(ponitX, ponitY, width, height);

}

 

- (CGRect)titleRectForContentRect:(CGRect)contentRect {

    

    CGFloat ponitX = 0;

    CGFloat ponitY = contentRect.size.height * kScale;

    CGFloat width = contentRect.size.width;

    CGFloat height = contentRect.size.height * (1 - kScale);

    

    return CGRectMake(ponitX, ponitY, width, height);

}

9、UITextField部分代码

(1)第一响应(键盘弹入弹出)

//进行第一响应

[self.view addSubview:textField];

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

    

//取消第一响应

[self.textField resignFirstResponder];    

//结束编辑

[self.textField endEditing:YES]; 

}