如何将 UITextField 中用作 leftView 的 UILabel 与 textField 的文本垂直对齐？

我正在使用一个UILabel as the leftView of a UITextField。问题是文本字段的文本高于标签的文本。

这是我到目前为止使用过的代码

UILabel *startsWith = [[UILabel alloc] init];
startsWith.font = [UIFont systemFontOfSize:14];
startsWith.textColor = [UIColor blackColor];
startsWith.backgroundColor = [UIColor clearColor];
startsWith.text = @"Text";
[startsWith sizeToFit];
self.textField.leftViewMode = UITextFieldViewModeAlways;
self.textField.leftView = startsWith;

我尝试稍微改变标签的框架，但它不起作用......

如何对齐两个文本？

您可以创建一个容器视图，在其中放置UILabel 1px up.

    UIView * v = [[UIView alloc] init];
    v.backgroundColor = [UIColor clearColor];

    UILabel *startsWith = [[UILabel alloc] init];
    startsWith.font = self.textfield.font;
    startsWith.textAlignment = self.textfield.textAlignment;
    startsWith.textColor = [UIColor blackColor];
    startsWith.backgroundColor = [UIColor clearColor];
    startsWith.text = @"Text";
    [startsWith sizeToFit];

    startsWith.frame = CGRectOffset(startsWith.frame, 0, -1);
    v.frame = startsWith.frame;
    [v addSubview:startsWith];
    self.textfield.leftViewMode = UITextFieldViewModeAlways;
    self.textfield.leftView = v;