Position和anchorPoint

Main.storyboard

ViewController.m

//

//  ViewController.m

//  7A12.position和anchorPoint

//

//  Created by huan on 16/2/4.

//  Copyright © 2016年 huanxi. All rights reserved.

//

 

#import "ViewController.h"

 

@interface ViewController ()

 

@end

 

 

@implementation ViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

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

    

    //创建一个图层

    CALayer *layer = [CALayer layer];

    layer.backgroundColor = [UIColor redColor].CGColor;

    layer.bounds = CGRectMake(0, 0, 100, 100);

    //图层的透明度

    layer.opacity = 0.5;

    

    //设置位置

    layer.position = CGPointMake(100, 100);

    //设置锚点

    layer.anchorPoint = CGPointMake(0.5, 0.5);

    //然后添加到控制器view的图层

    [self.view.layer addSublayer:layer];

    

}

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

@end

结果