iOS解决TextField被键盘遮住的问题

首先，我们在ViewController.h中

@interface ViewController :
UIViewController<UITextFieldDelegate>

@property (strong,
nonatomic) UIScrollView* scrollView;
@property (strong,
nonatomic) UITextField* textField;
@end

之后在ViewController.m

@implementation ViewController

- (void)viewDidLoad
{
[superviewDidLoad];

self.scrollView = [[UIScrollViewalloc]
initWithFrame:CGRectMake(0,
0, 320,
600)];
[self.viewaddSubview:self.scrollView];

self.textField = [[UITextFieldalloc]
initWithFrame:CGRectMake(50,
400, 100,
30)];
self.textField.backgroundColor = [UIColorwhiteColor];
[self.scrollViewaddSubview:self.textField];

[[NSNotificationCenterdefaultCenter]
addObserver:selfselector:@selector(textShowBegin:)
name:UIKeyboardWillShowNotificationobject:nil];

[[NSNotificationCenterdefaultCenter]
addObserver:selfselector:@selector(keyBoardDidHidden)
name:UIKeyboardWillHideNotificationobject:nil];

[self.textFieldaddTarget:selfaction:@selector(textFieldResign)
forControlEvents:UIControlEventEditingDidEndOnExit];

}
-(void)keyBoardDidHidden
{
self.scrollView.contentInset =
UIEdgeInsetsZero;
}
-(void)textFieldResign
{
[self.textFieldresignFirstResponder];
}

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
self.textField = textField;
}
-(void)textShowBegin:(NSNotification*)aNotification
{
NSDictionary* info = aNotification.userInfo;
NSLog(@"%@",info);

CGSize kbSize = [[info
objectForKey:UIKeyboardFrameBeginUserInfoKey]
CGRectValue].size;
UIEdgeInsets contentInsets =
UIEdgeInsetsMake(0, 0, kbSize.height,
0);

self.scrollView.contentInset = contentInsets;
//获取整个视图的大小和位置
CGRect aRect = self.view.frame;

aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect,
self.textField.frame.origin)) {

CGPoint scrollPoint = CGPointMake(0,
self.textField.frame.origin.y - kbSize.height);
[self.scrollViewsetContentOffset:scrollPoint
animated:YES];

}

}
下载地址 "TextFieldKB1119.zip" http://vdisk.weibo.com/s/Et2R_

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