重写textfield类，自定义文字间距乐什么的

。h文件

//

#import <Foundation/Foundation.h>

@interface MyTextField : UITextField

@end

。m文件

#import "MyTextField.h"

@implementation MyTextField

-(CGRect)textRectForBounds:(CGRect)bounds{

    return CGRectMake(15, 0, bounds.size.width-15, bounds.size.height);

}

-(CGRect)editingRectForBounds:(CGRect)bounds{

    return CGRectMake(15, 0, bounds.size.width-15, bounds.size.height);

}

-(CGRect)placeholderRectForBounds:(CGRect)bounds{

    return CGRectMake(15, 0, bounds.size.width-15, bounds.size.height);

}

@end