ios - 如何设置 UITextField 的自定义光标位置？

Question

当用户点击 UITextFiled 时，光标位于起点，出于设计目的，它看起来不太好。所以，我想更改光标 +5 的位置或从 UITextField 的中心开始。

我已经实现了从 Github 上找到的这段代码，但仍然无法正常工作。如果你能指导我如何解决这个问题，请帮助我。

我的代码如下

#import "UITextField+Selection.h"

@implementation UITextField (Selection)

- (NSRange)selectedRange
{
    UITextPosition* beginning = self.beginningOfDocument;
    UITextRange* selectedRange = self.selectedTextRange;
    UITextPosition* selectionStart = selectedRange.start;
    UITextPosition* selectionEnd = selectedRange.end;
    NSInteger location = [self offsetFromPosition:beginning toPosition:selectionStart];
    NSInteger length = [self offsetFromPosition:selectionStart toPosition:selectionEnd];
    return NSMakeRange(location, length);
}
- (void)setSelectedRange:(NSRange)range
{
    UITextPosition* beginning = self.beginningOfDocument;
    UITextPosition* startPosition = [self positionFromPosition:beginning offset:range.location];
    UITextPosition* endPosition = [self positionFromPosition:beginning offset:range.location + range.length];
    UITextRange* selectionRange = [self textRangeFromPosition:startPosition toPosition:endPosition];
    [self setSelectedTextRange:selectionRange];
}

#import "UITextField+Selection.h"

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

   [self.nameTextField setSelectedRange:NSMakeRange(5,0)]; // Category method called
}
@end

Answer 1

您可以像这样在 UITextFiled 的左侧添加填充，而不是移动光标，以使设计看起来更好

UIView *paddingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 20)];
textField.leftView = paddingView;
textField.leftViewMode = UITextFieldViewModeAlways;