iOS 之UITextFiled/UITextView小结

一:编辑被键盘遮挡的问题

参考自:http://blog.csdn.net/windkisshao/article/details/21398521

1.自定方法 ,用于移动视图

-(void)moveInputBarWithKeyboardHeight:(float)_CGRectHeight withDuration:(NSTimeInterval)_NSTimeInterval;

2.注册监听

NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];

[defaultCenter selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

[defaultCenter addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

3.实现方法

- (void)keyboardWillShow:(NSNotification *)notification {

NSDictionary *userInfo = [notification userInfo];

NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [aValue CGRectValue];

NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];

NSTimeInterval animationDuration;

[animationDurationValue getValue:&animationDuration];

if(nil==self.myTextView) return;// self.editTextView 为被键盘遮挡住的控件

CGRect rect = self.myTextView.frame;

float textY = rect.origin.y + rect.size.height;

float bottomY = SCREENHEIGHT - textY;//得到下边框到底部的距离 SCREENHEIGHT 为当前设备的高度

if(bottomY >=keyboardRect.size.height ){//键盘默认高度,如果大于此高度，则直接返回

return;

}

float moveY = keyboardRect.size.height - bottomY;

[self moveInputBarWithKeyboardHeight:moveY withDuration:animationDuration];

}

- (void)keyboardWillHide:(NSNotification *)notification {

NSDictionary* userInfo = [notification userInfo];

NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];

NSTimeInterval animationDuration;

[animationDurationValue getValue:&animationDuration];

[self moveInputBarWithKeyboardHeight:0.0 withDuration:animationDuration];

}

-(void)moveInputBarWithKeyboardHeight:(float)_CGRectHeight withDuration:(NSTimeInterval)_NSTimeInterval{

CGRect rect1 = self.view.frame;

[UIView beginAnimations:nil context:NULL];

[UIView setAnimationDuration:_NSTimeInterval];

rect1.origin.y = -_CGRectHeight;//view往上移动

self.view.frame = rect1;

[UIView commitAnimations];

}

二: 键盘

(1)键盘类型

UIKeyboardTypeDefault, // 默认键盘：支持所有字符

UIKeyboardTypeASCIICapable, // 支持ASCII的默认键盘
UIKeyboardTypeNumbersAndPunctuation, // 标准电话键盘，支持+*#等符号
UIKeyboardTypeURL, // URL键盘，有.com按钮；只支持URL字符
UIKeyboardTypeNumberPad, //纯数字键盘 (不带小数点)
UIKeyboardTypeDecimalPad //数字键盘 (带小数点)
UIKeyboardTypePhonePad, // 电话键盘
UIKeyboardTypeNamePhonePad, // 电话键盘，也支持输入人名字
UIKeyboardTypeEmailAddress, // 用于输入电子邮件地址的键盘
UIKeyboardTypeWebSearch //用于搜索
UIKeyboardTypeAlphabet

如: self.uIphone.keyboardType = UIKeyboardTypeNumberPad;

祥见:http://blog.csdn.net/crazyzhang1990/article/details/39965931

(2) return键的类型

UIReturnKeyDefault, 默认灰色按钮，标有Return

　 UIReturnKeyGo, 　标有Go的蓝色按钮 (完成,可用于填写资料的最后一项)

　 UIReturnKeyGoogle,标有Google的蓝色按钮，用语搜索

　 UIReturnKeyJoin,标有Join的蓝色按钮

　 UIReturnKeyNext,标有Next的蓝色按钮 (可用于登录/注册/填写地址-->下一步)

　 UIReturnKeyRoute,标有Route的蓝色按钮

　 UIReturnKeySearch,标有Search的蓝色按钮 (可用于搜索)

　 UIReturnKeySend,标有Send的蓝色按钮

　 UIReturnKeyYahoo,标有Yahoo的蓝色按钮

　 UIReturnKeyEmergencyCall, 紧急呼叫按钮

如:

self.uIphone.keyboardType = UIKeyboardTypeNumberPad;

(3) 点击return建响应事件

A.UITextField --> - (BOOL)textFieldShouldReturn:(UITextField *)textField{

如: 添加地址

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

if(textField.tag==10) //下一步 (姓名)

{

[self.uName resignFirstResponder];

[self.uIphone becomeFirstResponder];

}else if(textField.tag==11) //下一步 (电话)

{

[self.uIphone resignFirstResponder];

[self.reciveAddress becomeFirstResponder];

}else if(textField.tag==100) //完成(地址填完之后可直接调用接口)

{

[self.reciveAddress resignFirstResponder];

[self addBtn:nil];

}

return YES;

}

B.UITextView --> - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

如:

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
if ([text isEqualToString:@"\n"]){ //判断输入的字是否是回车，即按下return
//在这里做你响应return键的代码

[self addBtn:nil];

return NO; //这里返回NO，就代表return键值失效，即页面上按下return，不会出现换行，如果为yes，则输入页面会换行
}

return YES;
}

参考自:http://blog.sina.com.cn/s/blog_59fb90df010176re.html

三:UITextField小结

1.自定义UITextField 左边加图标(如:登录)

UIImageView *i=[[UIImageView alloc]initWithFrame:CGRectMake(15, 10, 21, 21)];

[i setImage:[UIImage imageNamed:@"yh"]];

UIView *userLeftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 40, 38)];

[userLeftView addSubview:i];

self.userName.leftView=userLeftView;

self.userName.leftViewMode=UITextFieldViewModeAlways;

2.设置自定义UITextField 的Placeholder颜色

UIColor *color = [UIColor blue];

self.userName.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@" 手机号" attributes:@{NSForegroundColorAttributeName: color}];

四:UITextView小结

1.设置Placeholder

@property (nonatomic,strong) UILabel *proText1;

self.automaticallyAdjustsScrollViewInsets = NO;

[self.leaveMessage setDelegate:self];

UILabel *lbl=[[UILabel alloc]initWithFrame:CGRectMake(self.leaveMessage.frame.origin.x+10, self.leaveMessage.frame.origin.y-35, self.leaveMessage.bounds.size.width, 100)];

lbl.text=@" 感谢您留下宝贵的意见....";

[lbl setFont:[UIFont systemFontOfSize:15.0]];

lbl.enabled=NO;

self.proText1=lbl;

[self.view addSubview:lbl];

#pragma mark -----textView的代理事件

-(void)textViewDidChange:(UITextView *)textView

{

// textView.text = [textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

if (textView.text.length == 0) {

self.proText1.text = @" 感谢您留下宝贵的意见....";

}else{

self.proText1.text = @"";

}

2.去掉空格以及换行

NSString *content = [textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

有的时候由于不正确的操作,直接将textView.text作为参数传到服务器,可能会产生意想不到的错误,因此就需要加这个对字符串进行一下处理

更多请参考:http://www.41443.com/HTML/iphone/20141109/204260.html