UI基础控件之UITextField
1.UITextField初始化
UITextField *userNameTextField = [[UITextFieldalloc] initWithFrame:CGRectMake
(100, 100, 190, 30)];
userNameTextField.borderStyle =UITextBorderStyleRoundedRect;
userNameTextField.placeholder = @"手机号/邮箱"; [containerView addSubview:userNameTextField];
[userNameTextField release];
2.UITextField属性
2.1文本属性
text :要显示的文本内容
textColor:文本内容的颜色
textAlignment:文本的对齐方式水平方式 textField.textAlignment = NSTextAlignmentLeft
font: 文本字体 textField.font = [UIFont fontWithName:@“Helvetica-Bold” size:20];
placeHolder:占位符无文字输入时的提示语 textField.placeholder = @“请输入用户名”
2.2外观控制
borderStyle:边框样式枚举值 textField.borderStyle = UITextBorderStyleLine
clearButtonMode:清除按钮(右侧) textField.clearButtonMode =UITextFieldViewModeAlways; //总是 显示清除按钮(小叉叉按钮)
leftView:输入框左视图(UIView类型) textField.leftView = leftView;
leftViewMode:左视图显示的mo'shi textField.leftViewMode = UITextFieldViewModeAlways
类似的还有右视图:rightView
2.3输入控制
enabled:BOOL值是否允许输入 textField.enabled = NO,默认为YES,可输入
clearsOnBeginEditing:是否开始输入时清空输入框 textField.clearsOnBeginEditing = YES;
secureTextEntry:是否文字以圆点格式现实用于密码框 textField.secureTextEntry = YES;
keyboardType:键盘弹出类型枚举值 textField.keyboardType = UIKeyboardNmuberPad;数字键盘 returnKeyType:键盘右下角return按钮类型 textField.returnKeyType = UIReturnKeyNext改为下一行
inputView:自定义输入视图:UIView类型默认是键盘 textField.inputView = myInputView;
inputAccessoryView输入视图上方的辅助视图 textField. inputAccessoryView = myAccessoryView;
3.UITextField键盘回收方法
3.1 点击键盘return按钮实现键盘回收的步骤:
1、AppDelegate.h文件接受UITextFieldDelegate协议
2、将AppDelegate作为UITextField的delegate
3、AppDelegate.m文件实现 textFieldShouldReturn:方法
示例
(1)AppDelegate.h
@interface AppDelegate : UIResponder <UIApplicationDelegate,UITextFieldDelegate>
(2)AppDelegate.m
textField.delegate = self;(self为AppDelegate,词句很关键)
(3)AppDelegate.m
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
3.2点击return跳到下一行(确定,搜索等)
4.**自定义视图控件(重点) ** (工程见附件)
自定义UILabel 与UITextField整合控件LTView
LTView.h文件:
@interface LTView : UIView
{
UILabel *_label; //左边的label
UITextField *_textField; //右边的textField
}
@property (nonatomic, assign) id <UITextFieldDelegate> delegate;
@property (nonatomic, assign) CGFloat spacing;
@property (nonatomic, retain) UILabel *label;
@property (nonatomic, retain) UITextField *textField;
/**
* 指定初始化方法
*
* @param frame 整个控件的frame
* @param labelText 左边label的文字
* @param text 右边输入框的文字
* @param placeHolder 右边输入框的占位符
*
* @return 返回一个LTView对象
*/
- (id)initWithFrame:(CGRect)frame labelText:(NSString *)labelText text:(NSString *)text placeHolder:(NSString *)placeHolder;
- (id)initWithFrame:(CGRect)frame labelText:(NSString *)labelText placeHolder:(NSString *)placeHolder;
//设置_label的文字
- (void)setLabelText:(NSString *)text;
//获取_label的文字
- (NSString *)labelText;
//设置_textField文字
- (void)setText:(NSString *)text;
//或者去_textField文字
- (NSString *)text;
@end
LTView.m文件:
#import "LTView.h"
@implementation LTView
@synthesize spacing = _spacing;
@synthesize delegate = _delegate;
- (void)dealloc
{
[_label release];
[_textField release];
[super dealloc];
}
- (void)setDelegate:(id<UITextFieldDelegate>)delegate
{
_delegate = delegate;
_textField.delegate = _delegate;
}
- (id <UITextFieldDelegate>)delegate
{
return _delegate;
}
- (id)initWithFrame:(CGRect)frame labelText:(NSString *)labelText text:(NSString *)text placeHolder:(NSString *)placeHolder
{
self = [super initWithFrame:frame];
if (self) {
//整个控件的宽高。
CGFloat width = frame.size.width;
CGFloat height = frame.size.height;
_label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, width/3, height)];
_label.backgroundColor = [UIColor clearColor];
_label.textAlignment = NSTextAlignmentRight;
[self addSubview:_label];
[_label release];
_textField = [[UITextField alloc] initWithFrame:CGRectMake(width/3 + _spacing, 0, width-width/3-_spacing, height)];
_textField.borderStyle = UITextBorderStyleRoundedRect;
[self addSubview:_textField];
[_textField release];
[self setLabelText:labelText];
[self setText:text];
_textField.placeholder =placeHolder;
}
return self;
}
- (id)initWithFrame:(CGRect)frame labelText:(NSString *)labelText placeHolder:(NSString *)placeHolder
{
return [self initWithFrame:frame labelText:labelText text:nil placeHolder:placeHolder];
}
- (id)initWithFrame:(CGRect)frame
{
return [self initWithFrame:frame labelText:nil text:nil placeHolder:nil];
}
- (void)setSpacing:(CGFloat)spacing
{
_spacing = spacing;
_textField.frame = CGRectMake(_label.frame.size.width + _spacing, 0, self.frame.size.width - _label.frame.size.width - _spacing, self.frame.size.height);
}
- (CGFloat)spacing
{
return _spacing;
}
//设置_label的文字
- (void)setLabelText:(NSString *)text
{
_label.text = text;
}
//获取_label的文字
- (NSString *)labelText
{
return _label.text;
}
//设置_textField文字
- (void)setText:(NSString *)text
{
_textField.text = text;
}
//或者去_textField文字
- (NSString *)text
{
return _textField.text;
}
AppDelegate.m文件
#import "AppDelegate.h"
#import "LTView.h"
@implementation AppDelegate
- (void)dealloc
{
[_window release];
[super dealloc];
}
//键盘回收
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
CGFloat y = 50;
NSArray *labelTitles = @[@"用户名:",@"密码:",@"确认密码:",@"邮箱:",@"手机号:"];
NSArray *placeHolders = @[@"数字、字母",@"6位数字",@"6位数字",@"Email",@"11位"];
for (int i = 0; i < 5; i++) {
LTView *ltView = [[LTView alloc] initWithFrame:CGRectMake(0, y, 320, 30) labelText:[labelTitles objectAtIndex:i] placeHolder:[placeHolders objectAtIndex:i]];
ltView.delegate = self;
[self.window addSubview:ltView];
y += 50;
[ltView release];
}
[self.window makeKeyAndVisible];
return YES;
}
enabled