iOS開發_textField的placeholder屬性的字體顏色、大小的設置

textField.placeholder = @"大保羅的iOS歷程";  
[textField setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"];  
[textField setValue:[UIFont boldSystemFontOfSize:16] forKeyPath:@"_placeholderLabel.font"];