用KVC的方法
textField.placeholder = @"客戶信息";
[textField setValue:[UIColor blackColor] forKeyPath:@"_placeholderLabel.textColor"];
[textField setValue:[UIFont boldSystemFontOfSize:16] forKeyPath:@"_placeholderLabel.font"];
用KVC的方法
textField.placeholder = @"客戶信息";
[textField setValue:[UIColor blackColor] forKeyPath:@"_placeholderLabel.textColor"];
[textField setValue:[UIFont boldSystemFontOfSize:16] forKeyPath:@"_placeholderLabel.font"];