UI控件详解06-UITextField 详解

//初始化一个UITextField,在.h文件里实现<UITextFieldDelegate>协议

#import <UIKit/UIKit.h>

@interface MainViewController :
UIViewController<UITextFieldDelegate>

@property(nonatomic,retain)UIProgressView *progress;

@end

UITextField *tex = [[UITextField
alloc] initWithFrame:CGRectMake(10,260,
300,
40)];

tex.borderStyle =
UITextBorderStyleRoundedRect;
tex.delegate =
self;
[self.view
addSubview:tex];
[tex
release];

//是否可以输入

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{

return
YES;
}

//键盘出现后当前view整体上移
-(void)textFieldDidBeginEditing:(UITextField *)textField
{

// CGRectOffset,让一个矩阵整体偏移

// self.view.frame = CGRectOffset(self.view.frame, 0, -100);

CGRect target = CGRectOffset(self.view.frame,
0, -100);

[UIView
animateWithDuration:0.3
animations:^{self.view.frame=target;}];

添加动画

}

//单击键盘return回复原始状态
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{

[textField resignFirstResponder];
//通知文本失去第一响应者状态

CGRect target = CGRectOffset(self.view.frame,
0, +100);

[UIView
animateWithDuration:0.3
animations:^{

self.view.frame = target;
}];

return
YES;
}

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