//
//  ConnectHotpotViewController.m
//  Ifish
//
//  Created by Minghao Xue on 2018/7/16.
//  Copyright © 2018年 lianlian. All rights reserved.
//

#import "ConnectHotpotViewController.h"

@interface ConnectHotpotViewController ()<UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
@property (strong, nonatomic) IBOutletCollection(UIImageView) NSArray *dashView;
@property (weak, nonatomic) IBOutlet UITextField *pwdTf;
@property (weak, nonatomic) IBOutlet UIView *containerView;

@end

@implementation ConnectHotpotViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"热点连接";
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keybordframeChanged:) name:UIKeyboardDidChangeFrameNotification object:nil];
    for (UIImageView *view in self.dashView) {
        view.backgroundColor = [UIColor clearColor];
        view.image = [self imageWithLineWithSize:view.frame.size];
    }
}

- (UIImage *)imageWithLineWithSize:(CGSize)size{
    CGFloat width = size.width;
    UIGraphicsBeginImageContext(size);
    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
    CGFloat lengths[] = {10,5};
    CGContextRef line = UIGraphicsGetCurrentContext();
    CGContextSetStrokeColorWithColor(line, [UIColor colorWithRed:133/255.0 green:133/255.0 blue:133/255.0 alpha:1.0].CGColor);
    CGContextSetLineDash(line, 0, lengths, 1);
    CGContextMoveToPoint(line, 0, 1);
    CGContextAddLineToPoint(line, width-10, 1);
    CGContextStrokePath(line);
    return  UIGraphicsGetImageFromCurrentImageContext();
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)keybordframeChanged:(NSNotification *)no {
    NSDictionary *userInfo = no.userInfo;
    
    // 动画的持续时间
    double duration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    
    // 键盘的frame
    CGRect keyboardF = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    keyboardF = [self.view convertRect:keyboardF fromView:self.view];
    CGRect containerViewF = [self.view convertRect:self.containerView.frame fromView:self.scrollView];
    
    CGFloat miniSpacing = 4;
    
    CGFloat offset = CGRectGetMaxY(containerViewF) + miniSpacing - CGRectGetMinY(keyboardF);
    if (offset <= 0) {
        offset = 0;
    }
    [UIView animateWithDuration:duration animations:^{
        self.scrollView.contentInset = UIEdgeInsetsMake(-offset, 0, 0, 0);
    }];
}

#pragma mark - UITextFieldDelegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    return YES;
}

@end