版本記錄

版本號(hào)	時(shí)間
V1.0	2017.06.21

前言

很多app都有建立小組或者社區(qū)的功能，或者給某人添加幾個(gè)描述標(biāo)簽等等，這些功能都需要?jiǎng)討B(tài)的添加標(biāo)簽視圖，這一篇就講述一下添加方法。感興趣的可以看看我寫的其他小技巧
1. 實(shí)用小技巧（一）：UIScrollView中上下左右滾動(dòng)方向的判斷

 2. 實(shí)用小技巧（二）：屏幕橫豎屏的判斷和相關(guān)邏輯
 3.實(shí)用小技巧（三）：點(diǎn)擊手勢(shì)屏蔽子視圖的響應(yīng)
4.實(shí)用小技巧（四）：動(dòng)態(tài)的增刪標(biāo)簽視圖

需求介紹

我們做app的時(shí)候很多時(shí)候都需要上傳圖片，最常見的就是上傳用戶的頭像，這里就包括多種方式，其中最常見的就是從本地相冊(cè)或者相機(jī)拍攝上傳，這一篇我就說一下這里的實(shí)現(xiàn)。

實(shí)現(xiàn)過程

我們都知道ios9以后，蘋果出于安全性的考慮，在打開本地相冊(cè)或者相機(jī)的時(shí)候需要權(quán)限的確定，需要配置plist文件，增加兩個(gè)鍵值對(duì)，具體如下圖所示。

更改權(quán)限

下面我們就直接看代碼吧。

1.JJAvatarVC.m

#import "JJAvatarVC.h"
#import "Masonry.h"

@interface JJAvatarVC () <UIImagePickerControllerDelegate>

@property (nonatomic, strong) UIImageView *avatarImageView;
@property (nonatomic, strong) UILabel *nickNameLabel;
@property (nonatomic, strong) UIImage *pickerImage;

@end

@implementation JJAvatarVC

#pragma mark - Override Base Function

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.title = @"頭像更換";
    
    [self setupUI];
}

- (void)viewWillLayoutSubviews
{
    [super viewWillLayoutSubviews];
    
    //頭像
    [self.avatarImageView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(self.view);
        make.height.width.equalTo(@120);
    }];
    
    //昵稱
    [self.nickNameLabel sizeToFit];
    [self.nickNameLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.equalTo(self.avatarImageView);
        make.top.equalTo(self.avatarImageView.mas_bottom).offset(15.0);
    }];
}

- (void)dealloc
{
    NSLog(@"%s",__FUNCTION__);
}

#pragma mark - Object Private Function

- (void)setupUI
{
    self.view.backgroundColor = [UIColor whiteColor];
    
    //頭像
    UIImageView *avatarImageView = [[UIImageView alloc] init];
    avatarImageView.image = [UIImage imageNamed:@"zhanweitu"];
    avatarImageView.userInteractionEnabled = YES;
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureDidTapped)];
    [avatarImageView addGestureRecognizer:tapGesture];
    [self.view addSubview:avatarImageView];
    self.avatarImageView = avatarImageView;
    
    //昵稱
    UILabel *nickNameLabel = [[UILabel alloc] init];
    nickNameLabel.text = @"刀客傳奇";
    nickNameLabel.textColor  = [UIColor blueColor];
    nickNameLabel.font = [UIFont boldSystemFontOfSize:17.0];
    [self.view addSubview:nickNameLabel];
    self.nickNameLabel = nickNameLabel;
}

- (void)choosePictureWithType:(NSString *)type
{
    UIImagePickerController *pickVC = [[UIImagePickerController alloc] init];
    if ([type isEqualToString:@"1"]) {
        pickVC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    else {
        pickVC.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    pickVC.allowsEditing = YES;
    pickVC.delegate = self;
    [self presentViewController:pickVC animated:YES completion:nil];

}

#pragma mark - Action && NOtification

- (void)tapGestureDidTapped
{
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    
    UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"從相冊(cè)中選擇" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
        [self choosePictureWithType:@"1"];
    }];
    
    UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"照相機(jī)" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
        [self choosePictureWithType:@"2"];
    }];
    
    [alertVC addAction:albumAction];
    [alertVC addAction:cameraAction];
    
    [self presentViewController:alertVC animated:YES completion:nil];
}

#pragma mark - UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    [picker dismissViewControllerAnimated:YES completion:nil];
    self.pickerImage = info[UIImagePickerControllerOriginalImage];
    self.avatarImageView.image = self.pickerImage;
}

@end