ios修改textField的placeholder的字体颜色、大小

1\ios修改textField的placeholder的字体颜色、大小

textField.placeholder=@"username is in here!";

[textFieldsetValue:[UIColorredColor]forKeyPath:@"_placeholderLabel.textColor"];

[textFieldsetValue:[UIFontboldSystemFontOfSize:16]forKeyPath:@"_placeholderLabel.font"];

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