ViewController.m文件
#import "ViewController.h"
@interface ViewController ()
@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)btnPressed:(id)sender {
if([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypePhotoLibrary]) {
//首先判断是否支持照片库，这个方法中的参数要和_imagePickerController.sourceType的值保持一致
//如果支持
_imagePickerController = [[UIImagePickerController alloc]init];
_imagePickerController.view.backgroundColor = [UIColor orangeColor];
_imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
_imagePickerController.delegate = self;
_imagePickerController.allowsEditing = YES; //该参数默认是NO，建议设置为YES，否则裁剪成圆形图片的方法将获取到的是椭圆形的图片，与你的预想大相径庭
[self presentViewController:_imagePickerController animated:YES completion:nil];
}
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
_ablumImageView.image = [UIImage circleOldImage:[info objectForKey:UIImagePickerControllerEditedImage] borderWidth:30.0f borderColor:[UIColor orangeColor]];
//该方法中Info的Key值“UIImagePickerControllerEditedImage”表示的是选择裁剪后的图片，如果使用这个Key值，则_imagePickerController.allowsEditing的值需要设置为YES。
//如果_imagePickerController.allowsEditing的值设置的NO，则这个Key的值应该设置为UIImagePickerControllerOriginalImage
/*
info中的Key的值有如下几个：
NSString *const UIImagePickerControllerMediaType ;指定用户选择的媒体类型（文章最后进行扩展）
NSString *const UIImagePickerControllerOriginalImage ;原始图片
NSString *const UIImagePickerControllerEditedImage ;修改后的图片
NSString *const UIImagePickerControllerCropRect ;裁剪尺寸
NSString *const UIImagePickerControllerMediaURL ;媒体的URL
NSString *const UIImagePickerControllerReferenceURL ;原件的URL
NSString *const UIImagePickerControllerMediaMetadata;当来数据来源是照相机的时候这个值才有效
*/
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[self dismissViewControllerAnimated:YES completion:nil];
}
@end
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持ASPKU。
注：相关教程知识阅读请移步到IOS开发频道。
