#为UITextView加上placeholder属性，使用方法简单. /** textview */ BBTextView * textView = [[BBTextView alloc]initWithFrame:CGRectMake(10, 100, 300, 300)]; textView.backgroundColor = [UIColor orangeColor]; textView.font = [UIFont systemFontOfSize:25]; textView.placeColor = [UIColor lightGrayColor]; textView.placeholder = @"This is placeholder!"; [self.view addSubview:textView];

/**
 textfield
 */
UITextField * field = [[UITextField alloc]initWithFrame:CGRectMake(10, 420, 300, 44)];
field.backgroundColor = [UIColor brownColor];
field.placeholder = @"This is placeholder!";
[self.view addSubview:field];