Last active
December 7, 2018 04:02
-
-
Save baobao/9b6367e48a338e9b92c3 to your computer and use it in GitHub Desktop.
UIImageViewとCALayerを切り替えるコード
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// ViewController.m | |
// CALayerTest | |
// | |
// Created by Ohba Shunsuke on 2013/03/03. | |
// Copyright (c) 2013年 Ohba Shunsuke. All rights reserved. | |
// | |
#import "ViewController.h" | |
//CALayerを使用する際は、以下のクラスをインポートする必要がある | |
#import <QuartzCore/QuartzCore.h> | |
@interface ViewController () | |
@end | |
@implementation ViewController | |
- (void)viewDidLoad | |
{ | |
[super viewDidLoad]; | |
UIImage *img = [UIImage imageNamed:@"bg"]; | |
//CALayer生成 | |
CALayer *l = [CALayer layer]; | |
//CALayerに画像を貼り付ける(CGImageの参照を渡すだけ) | |
l.contents = (id)img.CGImage; | |
//コンテンツのスケールを設定(0~1) | |
l.contentsRect = CGRectMake(0, 0, 1, 1); | |
//CALayerのサイズを指定する | |
l.bounds = CGRectMake(0, 0, img.size.width, img.size.height); | |
//中心が基準点になるため、座標を補正する | |
l.position = CGPointMake(img.size.width/2, img.size.height/2); | |
//UIImageView生成 | |
UIImageView *view = [[UIImageView alloc] initWithImage:img]; | |
//UIImageViewを表示 | |
[self.view addSubview:view]; | |
//CALayerを表示する | |
[self.view.layer addSublayer:l]; | |
} | |
@end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment