UITextField 详细解释

self.textFuserName.placeholder = @"请输入用户名";    //输入框中是否有个叉号    self.textFuserName.clearButtonMode = UITextFieldViewModeAlways;    //再次编辑就清空    self.textFuserName.clearsOnBeginEditing = YES;    //设置键盘的样式    self.textFuserName.keyboardType = UIKeyboardTypeASCIICapable;    //return键变成什么键    self.textFuserName.returnKeyType = UIReturnKeyNext;    //键盘外观    self.textFuserName.keyboardAppearance = UIKeyboardAppearanceDark;    //自动弹出键盘    [self.textFuserName becomeFirstResponder];    self.textFuserName.delegate = self;

常用代理方法：

//多个UITextField 点击“Return”，执行事件- (BOOL)textFieldShouldReturn:(UITextField *)textField{    //主要是[receiver resignFirstResponder]在哪调用就能把receiver对应的键盘往下收    if (textField == self.textFuserName) {        [self.textFpassword becomeFirstResponder];    }    if (textField == self.textFpassword) {        [self.textFpassword2 becomeFirstResponder];    }    if (textField == self.textFpassword2) {        [self.textFniChen becomeFirstResponder];    }    if (textField == self.textFniChen) {        [textField resignFirstResponder];        [self clickedPushNextzhuce:self.btnPush];    }        return YES;}

//当前编辑框，编辑完成，获取所输入的内容- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{    //返回BOOL值，指定是否允许文本字段结束编辑，当编辑结束，文本字段会让出first responder    //要想在用户结束编辑时阻止文本字段消失，可以返回NO    //这对一些文本字段必须始终保持活跃状态的程序很有用，比如即时消息    if (textField == self.textFuserName) {        strUsername = textField.text;        [self panduanString:strUsername];    }    if (textField == self.textFpassword) {            }    if (textField == self.textFpassword2) {            }    if (textField == self.textFniChen) {            }    return YES;}

#pragma mark 点击空白处，键盘弹下去/*只能通过Return关闭软键盘太不灵活了，应该提供轻触背景隐藏软键盘的功能。在storyboard，点击背景View，将它的Custom Class设置为UIControl，这样才会出现Touch Down事件。右击背景View弹出面板，按住Touch Down事件旁边的圆圈，然后拖曳到右侧.h文件的空白地方建立该事件的处理方法。*/- (IBAction)view_TouchDown:(id)sender{    // 发送resignFirstResponder.    [[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];}