iOS Development--textview Feedback page (placeholder label, word count, interactive settings for submit button)

Record the function of a page:

TextView placeholder, Word count, submit button interactive settings, as follows:

Input effect:

The specific implementation code is as follows:

1, setting up the proxy

@interface Fkviewcontroller () <UITextViewDelegate>

2, I am the direct xib drag control

@property (Weak, nonatomic) iboutlet Uitextview ***stringlenghtlab;

3,viewdidload inside

Self. Fktextview. delegate = self ;     = NO;     = NO;     = [Uicolor Lightgraycolor];

4, the specific agent method to achieve

-(void) Textviewdidchange: (Uitextview *) textview{Self.descLab.hidden=YES; Self.sendBtn.userInteractionEnabled=YES; Self.sendBtn.backgroundColor=Maincolor; //real-time display of wordsSelf.stringlenghtLab.text = [NSString stringWithFormat:@"%ld/100",(Long) TextView.text.length]; //Word Limit    if(TextView.text.length >= -) {Textview.text= [Textview.text Substringtoindex: -]; }        //Cancel the button click Permission and display the text    if(TextView.text.length = =0) {Self.descLab.hidden=NO; Self.sendBtn.userInteractionEnabled=NO; Self.sendBtn.backgroundColor=[Uicolor Lightgraycolor]; }}-(BOOL) TextView: (Uitextview *) TextView Shouldchangetextinrange: (nsrange) Range Replacementtext: (NSString *) text{if([Text isequaltostring:@"\ n"]) {[Self.                Fktextview Resignfirstresponder]; returnNO; }        returnYES;}

Just make a record!

iOS Development--textview Feedback page (placeholder label, word count, interactive settings for submit button)