IOS控制項UITextView 實現placeholder效果和解決UITableView鍵盤遮擋

IOS控制項UITextView 實現placeholder效果和解決UITableView鍵盤遮擋

平時開發中老是出現多行的文本而且要有placeholder提示，就自己整理項目中部分代碼以供參考、討論，希望有更好實現方法的人多多指教。

思路:通過改變UITextView的文本顏色實現placeholder效果，通過改變UITableView的setContentOffset方法解決鍵盤遮擋

1、建立UITextView

 

textView = [[UITextViewalloc] init];

textView.font = [UIFontsystemFontOfSize:14];

textView.frame =CGRectMake(10, 0,DEVICE_WIDTH-20,56);

textView.autoresizingMask =UIViewAutoresizingFlexibleHeight |UIViewAutoresizingFlexibleWidth;

textView.backgroundColor = [UIColorclearColor];

textView.textColor=[UIColorcolorWithHexString:@#999999];

textView.delegate =self;

textView.text=@請在這裡輸入;

[self.view addSubview:textView];

2、UITextView delegate-

#pragma mark -----UITextView delegate-----

 

//開始編輯

-(void)textViewDidBeginEditing:(UITextView *)textView

{

[tableviewsetContentOffset:CGPointMake(0,100) animated:YES];

if ([textView.textisEqualToString:@請在這裡輸入]) {

textView.textColor=[UIColorcolorWithHexString:@#77FF00];

textView.text =@;

}

}

//完成編輯

-(void)textViewDidEndEditing:(UITextView *)textView

{

if (textView.text.length==0||[textView.textisEqualToString:@]) {

textView.textColor=[UIColorcolorWithHexString:@#999999];

textView.text=@請在這裡輸入;

}

else

{

detailAddress.text= textView.text;

}

[tableviewsetContentOffset:CGPointMake(0, 0)animated:YES];

}