UI_UIImage

//

//  ViewController.m

//  UIImage

//

//  Created by HarrySun on 16/7/11.

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

//

#import "ViewController.h"

@interface
ViewController ()

@property (nonatomic,
strong) UIImage *myImage;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super
viewDidLoad];

    

    // 使用文件创建

//    _myImage = [UIImage imageNamed:@"1"];

    

    // 使用URL创建

//    _myImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://www.kutx.cn/xiaotupian/icons/png/200803/20080327095245737.png"]]];

//    // 通过文件加载指定路径下的文件内容获得新图片

//    _myImage = [[UIImage alloc]initWithContentsOfFile:[NSString stringWithFormat:@"%@/Documents/ppp.png",NSHomeDirectory()]];

    

    

    _myImage = [UIImage
imageWithCGImage:[UIImage
imageNamed:@"1"].CGImage
scale:1
orientation:(UIImageOrientationLeft)];  
// 创建的时候指定方法倍数以及旋转方向，scale是倍数，1代表和原图像尺寸一样，orientation
图片方向

    

    

//    _myImage = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://www.kutx.cn/xiaotupian/icons/png/200803/20080327095245737.png"]]];

    

    

//    CGImageRef cif=[_myImage CGImage];

//    _myImage = [UIImage imageWithCGImage:cif];  //使用Quartz 2D对象创建UIImage

    

    

    // 使用Core Graphics (静态方法)

//    UIImage* myImage3 = [UIImage imageWithCGImage:cif];

    

    

    UIImageView *imageView = [[UIImageView
alloc] initWithFrame:CGRectMake(50,
100, 100,
100)];

    [self.view
addSubview:imageView];

    imageView.image =
_myImage;

    

    

    NSLog(@"%ld",(long)_myImage.imageOrientation);
// 图片方向

    NSLog(@"%f,%f",_myImage.size.width,_myImage.size.height);
// 图片大小

    NSLog(@"%f",_myImage.scale); 
  // 图片的比例

    

    

    

   
// 根据给定的图片，从其指定区域截取一张新的图片

    UIImage *image1 = [self
getImageFromImage];

    UIImageView *imageView2 = [[UIImageView
alloc] initWithFrame:CGRectMake(50,
250, 100,
100)];

    imageView2.backgroundColor = [UIColor
redColor];

    [self.view
addSubview:imageView2];

    imageView2.image = image1;

    

    

    

    UIImage *image3 = [_myImage
imageWithAlignmentRectInsets:(UIEdgeInsetsMake(50,
100,
100, 100))];  
// 返回指定矩形区域内的图像

    UIImageView *imageView3 = [[UIImageView
alloc] initWithFrame:CGRectMake(50,
400, 100,
100)];

    imageView3.image = image3;

    [self.view
addSubview:imageView3];

    

    

    

    

    // ?

//    UIImage *image4 = [UIImage animatedImageNamed:@"xian－1.png" duration:5];

//    

//    UIImageView *imageView4 = [[UIImageView alloc] initWithFrame:CGRectMake(200, 100, 100, 100)];

//    imageView4.image = image4;

//    [self.view addSubview:imageView4];

    

    

    

    

    // --------- 下方设置动画 ---------

    NSMutableArray *imageArray = [[NSMutableArray
alloc]
initWithCapacity:30];

    for (int i =
1; i < 31; i ++) {

        UIImage *aImage = [UIImage
imageNamed:[NSString
stringWithFormat:@"xian－%d",i]];

        [imageArray addObject:aImage];

    }

    

    UIImage *image = [UIImage
animatedImageWithImages:imageArray
duration:2];  
// 用一组图片创建一个动态图片

    

    UIImageView *imgeView5 = [[UIImageView
alloc] initWithFrame:CGRectMake(50,
550, 100,
100)];

    imgeView5.image = image;

    [self.view
addSubview:imgeView5];

    

    

    

    UIImage *image6 = [UIImage
animatedResizableImageNamed:@"1.png"
capInsets:UIEdgeInsetsMake(50,
200,
100, 100)
resizingMode:UIImageResizingModeTile
duration:0];

    

    UIImageView *imageView6 = [[UIImageView
alloc] initWithFrame:CGRectMake(200,
250, 100,
100)];

    imageView6.image = image6;

    [self.view
addSubview:imageView6];

    

    

    

    

    

    

}

// 根据给定的图片，从其指定区域截取一张新的图片

-(UIImage *)getImageFromImage{

    //大图bigImage

    //定义myImageRect，截图的区域

    CGRect myImageRect =
CGRectMake(50.0,
100.0, 50.0,
50.0);

    UIImage* bigImage= [UIImage
imageNamed:@"1.png"];

    CGImageRef imageRef = bigImage.CGImage;

    CGImageRef subImageRef =
CGImageCreateWithImageInRect(imageRef, myImageRect);

    CGSize size;

    size.width =
50.0;

    size.height =
50.0;

    UIGraphicsBeginImageContext(size);

    CGContextRef context =
UIGraphicsGetCurrentContext();

    CGContextDrawImage(context, myImageRect, subImageRef);

    UIImage* smallImage = [UIImage
imageWithCGImage:subImageRef];

    UIGraphicsEndImageContext();

    return smallImage;

}

- (void)didReceiveMemoryWarning {

    [super
didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end