界面搭建
创建一个画饼状的类 eatView 集成UIView
#import "eatView.h" @implementation eatView // Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
//创建一个园的风格数组
NSArray * arr = @[@,@,@,@,@,@,@,@,@,@]; //计算园的中心点
CGPoint center = CGPointMake(rect.size.width * 0.5, rect.size.height * 0.5);
//园的半径
CGFloat radius = rect.size.width * 0.5 ;
//开始位置
CGFloat startA = ;
//结束位置
CGFloat endA = ;
CGFloat angle = ;
//设置uiView的背景颜色
self.backgroundColor=[UIColor clearColor];
//遍历园等分的数组
for (NSNumber *num in arr) {
//计算开始位置
startA = endA;
//计算弧度
angle = num.intValue / 100.0 * M_PI *;
//结束位置
endA =startA + angle;
//创建画笔
UIBezierPath * path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];
//画一条连接中心的线
[path addLineToPoint:center];
//设置随机颜色
[[self randomColor]set];
[path fill];
}
//创建一个定时器
CADisplayLink * link =[CADisplayLink displayLinkWithTarget:self selector:@selector(click)];
//加入主运行时
[link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
//创建一个定时器
// [NSTimer scheduledTimerWithTimeInterval:1/50.0 target:self selector:@selector(click) userInfo:nil repeats:YES];
}
/**
生产随机颜色
*/
- (UIColor *)randomColor{
return [UIColor colorWithRed:arc4random_uniform()/255.0 green:arc4random_uniform()/255.0 blue:arc4random_uniform()/255.0 alpha:];
}
/**
重绘图行
*/
-(void)click{
[self setNeedsDisplay];
} @end
脱线 一根UITextField 另一根UIView
@property (weak, nonatomic) IBOutlet UITextField *textNum;
@property (weak, nonatomic) IBOutlet UIView *beginView;
拖线 UIButton 点击方法 - (IBAction)beginGoBtn:(id)sender
#import "ViewController.h" #import "eatView.h" @interface ViewController ()
@property (weak, nonatomic) IBOutlet UITextField *textNum;
@property (weak, nonatomic) IBOutlet UIView *beginView; @end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} - (IBAction)beginGoBtn:(id)sender {
//释放加载过得UIview 不然又内存问题
for (UIView * vol in self.beginView.subviews) {
[vol removeFromSuperview];
}
//关闭键盘
[self.view endEditing:YES];
int count=self.textNum.text.intValue;
for (int i=0; i<count; i++) {
eatView * eatV = [[eatView alloc]init]; // 按钮尺寸
CGFloat optionW = 50;
CGFloat optionH = 50;
// 按钮之间的间距
CGFloat margin = 5;
// 控制器view的宽度
CGFloat viewW = self.beginView.frame.size.width;
// 总列数
int totalColumns = 6;
// 最左边的间距 = 0.5 * (控制器view的宽度 - 总列数 * 按钮宽度 - (总列数 - 1) * 按钮之间的间距)
CGFloat leftMargin = (viewW - totalColumns * optionW - margin * (totalColumns - 1)) * 0.5;
int col = i % totalColumns;
// 按钮的x = 最左边的间距 + 列号 * (按钮宽度 + 按钮之间的间距)
CGFloat optionX = leftMargin + col * (optionW + margin);
int row = i / totalColumns;
// 按钮的y = 行号 * (按钮高度 + 按钮之间的间距)
CGFloat optionY = row * (optionH + margin);
eatV.frame = CGRectMake(optionX, optionY, optionW, optionH); [self.beginView addSubview:eatV];
} } @end
效果图：