標籤:nsrange should xib back 功能 void div 輸入
記錄一個頁面的功能:
textview的預留位置,字數統計,提交按鈕的互動設定,具體如下:
輸入效果:
具體實現代碼如下:
1,設定代理
@interface FKViewController ()<UITextViewDelegate>
2,我是直接xib拖拽的控制項
@property (weak, nonatomic) IBOutlet UITextView *FKTextView;@property (weak, nonatomic) IBOutlet UILabel *descLab;@property (weak, nonatomic) IBOutlet UIButton *sendBtn;@property (weak, nonatomic) IBOutlet UILabel *stringlenghtLab;
3,viewDidLoad裡面
self.FKTextView.delegate = self; self.descLab.userInteractionEnabled = NO; self.sendBtn.userInteractionEnabled = NO; self.sendBtn.backgroundColor = [UIColor lightGrayColor];
4,具體代理方法實現
-(void)textViewDidChange:(UITextView *)textView{ self.descLab.hidden = YES; self.sendBtn.userInteractionEnabled = YES; self.sendBtn.backgroundColor = MainColor; //即時顯示字數 self.stringlenghtLab.text = [NSString stringWithFormat:@"%ld/100",(long)textView.text.length]; //字數限制 if (textView.text.length >= 100) { textView.text = [textView.text substringToIndex:100]; } //取消按鈕點擊許可權,並顯示文字 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]; return NO; } return YES;}
僅做記錄!
ios開發之--textview意見反饋頁面(佔位label,字數統計,提交按鈕的互動設定)