//
// ViewController.m
// 访问系统相册
//
// Created by lanou on 16/7/12.
// Copyright © 2016年 pingguo. All rights reserved.
//
#import "ViewController.h"
//遵守协议
@interface ViewController ()<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
@property(nonatomic,strong)UIButton *userbtn;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 所有的能看得到的ui控件创建初始化方式都可以采用alloc initWithFrame
self.userbtn=[[UIButton alloc]initWithFrame:CGRectMake(160, 60, 80, 80)];
// 设置颜色
self.userbtn.backgroundColor=[UIColor redColor];
// 设置圆形半径
self.userbtn.layer.cornerRadius=40;
self.userbtn.layer.masksToBounds=YES;
// 添加点击事件：去访问系统相册
[self.userbtn addTarget:self action:@selector(setUserImage) forControlEvents:(UIControlEventTouchUpInside)];
// 将按钮添加到屏幕上面来
[self.view addSubview:self.userbtn];
}
//访问系统相册
-(void)setUserImage
{
UIImagePickerController *imagePicker=[[ UIImagePickerController alloc]init];
// 设置代理，到@interface后面遵守协议<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
imagePicker.delegate=self;
[self presentViewController:imagePicker animated:YES completion:nil];
}
//这个方法是协议UIImagePickerControllerDelegate里面的，选择图片结束的时候就会自动调用
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo
{
//设置头像
[self.userbtn setBackgroundImage:image forState:(UIControlStateNormal)];
// 将系统相册消失掉
[picker dismissViewControllerAnimated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
