#import "HMViewController.h"

@interface HMViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation HMViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

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

    UIImage *oldImage = [UIImage imageNamed:@"img"];

    // 开启上下文

    // size 新的图片大小

    // opaque YES 不透明 NO 透明

    UIGraphicsBeginImageContextWithOptions(oldImage.size, NO, 0.0);

    [oldImage drawAtPoint:CGPointZero];

    NSString *text =  @"我要高薪 ！";

    NSDictionary *dict = @{

                           NSFontAttributeName : [UIFont systemFontOfSize:],

                           NSForegroundColorAttributeName : [UIColor redColor]

                           };

    [text drawAtPoint:CGPointMake(, ) withAttributes:dict];

    // 获取新的图片

    UIImage *newImage =  UIGraphicsGetImageFromCurrentImageContext();

    // 关闭上下文

    UIGraphicsEndImageContext();

    _imageView.image = newImage;

    // 把图片转换成png格式的二进制数据

    NSData *data = UIImagePNGRepresentation(newImage);

    // 写入桌面

    [data writeToFile:@"/Users/apple/Desktop/newImage.png" atomically:YES];

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end