iOS点击键盘以外空白区域隐藏键盘的常见方法
iOS开发中,经常要用到输入框,可默认情况下,输入框出来之后,除非点击键盘上面的“Done”或“Next”按钮才能将其隐藏。站在用户体验的角度上看,这种情况很不友好,尤其是不能突显苹果操作的便捷性。因此,查阅了一些资料,加上实践,总结出了两种方法:
第一种,是最常见的,就是给最外层的view添加一个手势响应UITapGestureRecognizer,代码如下:
- (void)viewDidLoad { [super viewDidLoad]; UITapGestureRecognizer *tapGr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTapped:)]; tapGr.cancelsTouchesInView = NO; [self.view addGestureRecognizer:tapGr]; } -(void)viewTapped:(UITapGestureRecognizer*)tapGr { [activitySearchBar resignFirstResponder]; }
第二种,稍微复杂些,不过思路也差不多,就是将最外层的view作为一个UIScrollView,点击即可将当前的焦点交给UIScrollView,代码如下:
#import <UIKit/UIKit.h> #import "BaseData.h" @interface BaseTextFieldView : UIScrollView { id target; int ypos,y; } -(void)setTarget:(id)d; @end
#import "BaseTextFieldView.h" @implementation BaseTextFieldView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // Initialization code. } return self; } - (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event { [target performSelector:@selector(endEdit)]; return YES; } -(void)setTarget:(id)d { ypos = 0; target = d; } -(BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view { return YES; } - (void)dealloc { [super dealloc]; }
在需要调用的Controller的.h文件添加对UITextFieldDelegate的引用,代码如下:
#import "BaseTextFieldView.h"
@interface DemoController : UIViewController <UITextFieldDelegate>{ }
将xib文件的view,改成对BaseTextFieldView的引用,如图:
在Controller的.m文件中,添加代码:
[(BaseTextFieldView *)self.view setTarget:self];
以上两种方法经测试均可实现。