iOS Swift 使用contentOffset让您的用户注册页面动起来

iOS中

.h

//
//  ViewController.h
//  使用contentOffset让你的用户注册页面动起来
//
//  Created by 黄权浩 on 15-1-4.
//  Copyright (c) 2015年 黄权浩. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UIScrollView *scr;
@property (weak, nonatomic) IBOutlet UITextField *fd1;
@property (weak, nonatomic) IBOutlet UITextField *fd2;
@property (weak, nonatomic) IBOutlet UITextField *fd3;
@property (weak, nonatomic) IBOutlet UITextField *fd4;
@property (weak, nonatomic) IBOutlet UITextField *fd5;
@end

.m

//
//  ViewController.m
//  使用contentOffset让你的用户注册页面动起来
//
//  Created by 黄权浩 on 15-1-4.
//  Copyright (c) 2015年 黄权浩. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _fd1.delegate = self;
    _fd2.delegate = self;
    _fd3.delegate = self;
    _fd4.delegate = self;
    _fd5.delegate = self;
    // Do any additional setup after loading the view, typically from a nib.
    //按照我们nib上的输入框如果点击的话那么弹出来的键盘会遮盖住输入框，那么我们就可以用setContentOffset这个属性来解决这个问题
    
}

//在键盘将要输入的时候来判断
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    if (textField == _fd1) {
        [_scr setContentOffset:CGPointMake(0, 40) animated:YES];//这样我们让滑动视图向上弹起40的高度，那么键盘就无法遮住输入框了
    }else if (textField == _fd2) {
        [_scr setContentOffset:CGPointMake(0, 70) animated:YES];
    }else if (textField == _fd3) {
        [_scr setContentOffset:CGPointMake(0, 100) animated:YES];
    }else if (textField == _fd4) {
        [_scr setContentOffset:CGPointMake(0, 130) animated:YES];
    }else if (textField == _fd5) {
        [_scr setContentOffset:CGPointMake(0, 160) animated:YES];
    }//这样来我们会做出一个视图滚动的效果，对用户体验是比较好的
    return YES;
    //记得在键盘收回的时候给_scr还原
//    [_scr setContentOffset:CGPointMake(0, 0) animated:YES];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

在swift中

//
//  ViewController.swift
//  使用contentOffset让你的用户注册页面动起来
//
//  Created by 黄权浩 on 15-1-4.
//  Copyright (c) 2015年 黄权浩. All rights reserved.
//

import UIKit

class ViewController: UIViewController,UITextFieldDelegate {

    @IBOutlet weak var scr: UIScrollView!
    @IBOutlet weak var fd1: UITextField!
    @IBOutlet weak var fd2: UITextField!
    @IBOutlet weak var fd3: UITextField!
    @IBOutlet weak var fd4: UITextField!
    @IBOutlet weak var fd5: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        fd1.delegate = self
        fd2.delegate = self
        fd3.delegate = self
        fd4.delegate = self
        fd5.delegate = self
        //按照我们nib上的输入框如果点击的话那么弹出来的键盘会遮盖住输入框，那么我们就可以用setContentOffset这个属性来解决这个问题
        
    }

    //TextFidldDelegate代理
    func textFieldShouldBeginEditing(textField: UITextField) -> Bool{
        if textField == fd1 {
            scr .setContentOffset(CGPointMake(0, 40), animated: true)//这样我们让滑动视图向上弹起40的高度，那么键盘就无法遮住输入框了
        }else if textField == fd2 {
            scr .setContentOffset(CGPointMake(0, 70), animated: true)
        }else if textField == fd3 {
            scr .setContentOffset(CGPointMake(0, 100), animated: true)
        }else if textField == fd4 {
            scr .setContentOffset(CGPointMake(0, 130), animated: true)
        }else if textField == fd5 {
            scr .setContentOffset(CGPointMake(0, 160), animated: true)
        }//这样来我们会做出一个视图滚动的效果，对用户体验是比较好的
        return true;
        //记得在键盘收回的时候给_scr还原
        //    [_scr setContentOffset:CGPointMake(0, 0) animated:YES];
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}