UITextView和UITextField的placeholder，键盘隐藏，键盘换行变完成字样

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http://blog.csdn.net/hengshujiyi/article/details/9086093- (void)initFeedBackViews

{

//设置页面的背景颜色

UIColor *ViewBgColor = [UIColor colorWithRed:(247.0f/255.0f)green:(247.0f/255.0f) blue:(247.0f/255.0f) alpha:1.0f];

self.view.backgroundColor = ViewBgColor;

UILabel *fix_feed_label = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, 70, 30)];

fix_feed_label.text = @"意见内容";

fix_feed_label.backgroundColor = [UIColor clearColor];

fix_feed_label.textColor = [UIColor blackColor];

_content_textView = [[UITextView alloc]initWithFrame:CGRectMake(10, 25, 300, 80)];

_content_textView.font =  [UIFont boldSystemFontOfSize:13];

_content_textView.delegate = self;

//设置键盘，使换行变为完成字样

_content_textView.keyboardType = UIKeyboardAppearanceDefault;

_content_textView.returnKeyType = UIReturnKeyDone;

_placeholder_label = [[UILabel alloc]initWithFrame:CGRectMake(12, 25, 300, 30)];

_placeholder_label.text = @"请留下您的宝贵意见或建议（不少于10个汉字）";

_placeholder_label.font =  [UIFont boldSystemFontOfSize:13];

_placeholder_label.textColor = [UIColor lightGrayColor];

_placeholder_label.layer.cornerRadius = 10;

_placeholder_label.layer.masksToBounds = YES;

UILabel *fix_contact_label = [[UILabel alloc]initWithFrame:CGRectMake(10, 105, 160, 30)];

fix_contact_label.text = @"联系方式 （选填）";

fix_contact_label.backgroundColor = [UIColor clearColor];

fix_contact_label.textColor = [UIColor blackColor];

_contact_field = [[UITextField alloc]initWithFrame:CGRectMake(15, 130, 300, 30)];

[_contact_field setBorderStyle:UITextBorderStyleNone];

_contact_field.font =  [UIFont boldSystemFontOfSize:13];

_contact_field.contentVerticalAlignment =UIControlContentVerticalAlignmentCenter;

_contact_field.keyboardType = UIKeyboardAppearanceDefault;

_contact_field.returnKeyType = UIReturnKeyDone;

_contact_field.placeholder = @"手机号码或EMAIL";

_contact_field.delegate = self;

_submit_button = [UIButtonbuttonWithType:UIButtonTypeCustom];

[_submit_button setFrame: CGRectMake(0, 0, 55, 27)];

UIColor *sequenceColor = [UIColor colorWithRed:(246.0f/255)green:(109.0f/255.0f) blue:(9.0f/255.0f) alpha:1.0f];

_submit_button.backgroundColor = sequenceColor;

[_submit_button setTitle:@"提交"forState:UIControlStateNormal];

[_submit_button setTitleColor:[UIColor whiteColor]forState:UIControlStateNormal];

[_submit_button addTarget:self action:@selector(clickSubmit:)forControlEvents:UIControlEventTouchUpInside];

self.navigationItem.rightBarButtonItem = [[UIBarButtonItemalloc]initWithCustomView:_submit_button];

[self.view addSubview:fix_feed_label];

[self.view addSubview:fix_contact_label];

[self.view addSubview:_content_textView];

[self.view addSubview:_placeholder_label];

[self.view addSubview:_contact_field];

}

- (void)clickSubmit:(id)sender

{

NSLog(@"clickSubmit");

}

/*

基于UIView点击编辑框以外的虚拟键盘收起

**/

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

if (![self.content_textView isExclusiveTouch]||(![self.contact_field isExclusiveTouch])) {

if (self.content_textView.text.length == 0)

{

NSLog(@"ssssss");

self.placeholder_label.text = @"请留下您的宝贵意见或建议（不少于10个汉字）";

_placeholder_label.hidden = NO;

}

[self.content_textView resignFirstResponder];

[self.contact_field resignFirstResponder];

}

}

/*

键盘收回事件，UITextField协议方法

**/

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

[textField resignFirstResponder];

return NO;

}

#pragma textViewDelegate

-(void)textViewDidChange:(UITextView *)textView

{

if (self.content_textView.text.length != 0) {

self.placeholder_label.text = @"";

_placeholder_label.hidden = YES;

}

else{

self.placeholder_label.text = @"请留下您的宝贵意见或建议（不少于10个汉字）";

_placeholder_label.hidden = NO;

}

}

- (void)textViewDidBeginEditing:(UITextView *)textView;

{

self.placeholder_label.text = @"";

}

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

{

if ([@"\n" isEqualToString:text] == YES)

{

[textView resignFirstResponder];

if (self.content_textView.text.length == 0)

{

NSLog(@"ssssss");

self.placeholder_label.text = @"请留下您的宝贵意见或建议（不少于10个汉字）";

_placeholder_label.hidden = NO;

}

return NO;

}

return YES;

}