IOS control UITextView achieves placeholder effect and solves UITableView keyboard occlusion

IOS control UITextView achieves placeholder effect and solves UITableView keyboard occlusion

At ordinary times, there are always multiple lines of text in development, and there must be a placeholder prompt. You can organize some code in the project for your reference and discussion. I hope you can provide more suggestions for better implementation methods.

Ideas:Placeholder effect is achieved by changing the text color of UITextView. The setContentOffset method of UITableView solves the problem of keyboard occlusion.

1. Create 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 = @ Please input here;

[Self. view addSubview: textView];

2. UITextView delegate-

# Pragma mark ----- UITextView delegate -----

 

// Start editing

-(Void) textViewDidBeginEditing :( UITextView *) textView

{

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

If ([textView. textisEqualToString: @ Please input here]) {

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

TextView. text = @;

}

}

// Complete editing

-(Void) textViewDidEndEditing :( UITextView *) textView

{

If (textView. text. length = 0 | [textView. textis#tostring: @]) {

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

TextView. text = @ Please input here;

}

Else

{

DetailAddress. text = textView. text;

}

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

}