uitextfield 被键盘阻档的解决方法

最新推荐文章于 2019-09-25 15:38:50 发布

转载最新推荐文章于 2019-09-25 15:38:50 发布 · 152 阅读

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原文链接：https://my.oschina.net/u/564793/blog/360656

本文介绍了一个iOS应用中处理键盘弹出时滚动视图自动调整位置的方法。通过监听文本框开始编辑和返回键事件，动态调整UIScrollView的内容大小和偏移量，确保输入框始终可见。

#import "ViewController.h"
#define PhoneScreenWidth [[UIScreen mainScreen] bounds].size.width
#define PhoneScreenHeight [[UIScreen mainScreen] bounds].size.height

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UITextField *textField;
@property (weak, nonatomic) IBOutlet UIScrollView *uisv;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

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

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    //foucsTextField = textField;
    self.uisv.contentSize = CGSizeMake(PhoneScreenWidth,PhoneScreenHeight +216);//216是键盘固定高度

   CGPoint pt = [textField convertPoint:CGPointMake(0, 0) toView:self.uisv];
   [self.uisv setContentOffset:CGPointMake(0, pt.y-20) animated:YES]; //滑动到当前坐标上 20是sturtbar高度
}

- (BOOL)textFieldShouldReturn:(UITextField*)theTextField
{
    {
        [theTextField resignFirstResponder];

        //开始动画
        [UIView beginAnimations:nil context:nil];
        //设定动画持续时间
        [UIView setAnimationDuration:0.3];
        //self.uisv.frame = CGRectMake(0, 20, PhoneScreenWidth, PhoneScreenHeight);
        self.uisv.contentSize = CGSizeMake(PhoneScreenWidth,PhoneScreenHeight);
        //动画结束
        [UIView commitAnimations];
    }
    return YES;
}

@end