//  CustomField.m

#import "CustomField.h"

@implementation CustomField

- (id)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        // Initialization code

    }

    return self;

}

/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

 */

- (void)drawRect:(CGRect)rect

{

    // Drawing code

}

 -(CGRect)clearButtonRectForBounds:(CGRect)bounds

 {

 return CGRectMake(bounds.origin.x +bounds.size.width - ,bounds.origin.y+bounds.size.height/-/, , );

 }

 //bounds.size.height -20

 //控制placeHolder的位置，左右缩20

 -(CGRect)placeholderRectForBounds:(CGRect)bounds

 {

 //return CGRectInset(bounds,20, 0);

 CGRect inset= CGRectMake(bounds.origin.x+, bounds.origin.y+, bounds.size.width -, bounds.size.height);

 return inset;

 }

 //控制显示文本的位置

 -(CGRect)textRectForBounds:(CGRect)bounds

 {

 CGRect inset= CGRectMake(bounds.origin.x+, bounds.origin.y, bounds.size.width -, bounds.size.height);//更好理解些

 return inset;

 }

 //控制编辑文本的位置

 -(CGRect)editingRectForBounds:(CGRect)bounds

 {

 //return CGRectInset(bounds, 10 , 0 );

 CGRect inset= CGRectMake(bounds.origin.x +, bounds.origin.y, bounds.size.width -, bounds.size.height);

 return inset;

 }

 //控制左视图位置

 - (CGRect)leftViewRectForBounds:(CGRect)bounds

 {

 CGRect inset= CGRectMake(bounds.origin.x +, bounds.origin.y, bounds.size.width-, bounds.size.height);

 return inset;

 //returnCGRectInset(bounds,50,0);

 }

- (CGRect)rightViewRectForBounds:(CGRect)bounds;

{

    CGRect inset= CGRectMake(bounds.origin.x +bounds.size.width-, bounds.origin.y+bounds.size.height/-,,);

    return inset;

}

 //控制placeHolder的颜色、字体

 - (void)drawPlaceholderInRect:(CGRect)rect

 {

 //CGContextRef context =UIGraphicsGetCurrentContext();

 //CGContextSetFillColorWithColor(context,[UIColor yellowColor].CGColor);

 [[UIColor brownColor] setFill];

 [[self placeholder] drawInRect:rect withFont:[UIFont systemFontOfSize:]];

 }

@end

//  使用方法，在XXXViewController里导入#import "CustomField.h"

   CustomField  *myField=[[CustomField  alloc]init];