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self.title=@"修改UITextField的placeholder字体颜色";
UITextField *textTF=[[UITextField alloc]initWithFrame:CGRectMake(20,130,300,30)];
textTF.placeholder=@"修改UITextField的placeholder字体颜色";
// // 一种方式
// [textTF setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"];
// 第二种方式
textTF.attributedPlaceholder=[[NSAttributedString alloc]initWithString:@"修改UITextField的placeholder字体颜色" attributes:@{NSForegroundColorAttributeName:[UIColor redColor]}];
[self.view addSubview:textTF];
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原文地址:http://www.cnblogs.com/block123/p/5620051.html