UILabel全解

设置label中placeHolder的字体大小和颜色

//设置placeholder的颜色和字体
    [self.textField setValue:[UIColor whiteColor] forKeyPath:@"_placeholderLabel.textColor"];
    [self.textField setValue:[UIFont boldSystemFontOfSize:16] forKeyPath:@"_placeholderLabel.font"];

nvm use --delete-prefix iojs-v3.3.1 --silent

解决node npm command not found 问题

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