UITextField键盘弹出遮挡的解决

之前在项目中也经常用到UITextFiled，键盘的弹出可能会遮挡到靠下方的输入框，参考了网站上的一些方法自己写出了一个模板，高手勿喷。

整体思路：点击了输入框后，整体视图向上移动被挡住的那个距离。点击空白地方或者Return按钮后又收回到原来的位置，并且通过位移动画来实现这个过程。

        

#import "ViewController.h"

@interface ViewController () 
{
    UITextField * nameFiled;
    UITextField * passWordField;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    
    
    nameFiled     = [[UITextField alloc] initWithFrame:CGRectMake(40, 300, 200, 40)];
    passWordField = [[UITextField alloc] initWithFrame:CGRectMake(40, 380, 200, 40)];
    
    nameFiled.layer.masksToBounds     = YES;
    passWordField.layer.masksToBounds = YES;
    nameFiled.layer.cornerRadius     = 4.0f;
    passWordField.layer.cornerRadius = 4.0f;
    nameFiled.layer.borderColor     = [[UIColor blackColor] CGColor];
    passWordField.layer.borderColor = [[UIColor blackColor] CGColor];
    nameFiled.layer.borderWidth     = 1.0f;
    passWordField.layer.borderWidth = 1.0f;
    
    nameFiled.delegate     = self;
    passWordField.delegate = self;
    
    [self.view addSubview:nameFiled];
    [self.view addSubview:passWordField];
    
}

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    CGRect textFieldFrame      = textField.frame;
    //当前输入框的Y
    CGFloat textField_Y        = textFieldFrame.origin.y;
    //当前输入框的高度
    CGFloat textFieldHight     = textFieldFrame.size.height;
    //屏幕高度
    CGFloat screenHight        = self.view.frame.size.height;
    //键盘高度
    CGFloat keyBordHight       = 216;
    //键盘tabbar高度
    CGFloat keyBordTabbarHight = 35;
    //计算输入框向上移动的偏移量
    int offset = textField_Y + textFieldHight - (screenHight - keyBordHight - keyBordTabbarHight);
    
    //根据键盘遮挡的高度开始移动动画
    [UIView animateWithDuration:0.3 animations:^{
        if (offset > 0) {
            
            float width = self.view.frame.size.width;
            float hight = self.view.frame.size.height;
            
            CGRect rect = CGRectMake(0, -offset, width, hight);
            self.view.frame = rect;
        }
    }];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.view endEditing:YES];
    //键盘收回后视图移动回原位的动画
    [UIView animateWithDuration:0.3 animations:^{
        
        float width = self.view.frame.size.width;
        float hight = self.view.frame.size.height;
        
        CGRect rect = CGRectMake(0, 0, width, hight);
        self.view.frame = rect;
    }];

}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [self.view endEditing:YES];
    //点击Return,键盘收回后视图移动回原位的动画
    [UIView animateWithDuration:0.3 animations:^{
        
        float width = self.view.frame.size.width;
        float hight = self.view.frame.size.height;
        
        CGRect rect = CGRectMake(0, 0, width, hight);
        self.view.frame = rect;
    }];
    return YES;
}

@end