改变UITextField中的系统控件的大小及位置

参考文章：http://www.th7.cn/Program/IOS/201502/398980.shtml

1.写一个继承于UITextField的子类，例如：SFCustomTextField；

2.在相应的重写方法中加入你想要的操作

3.用SFCustomTextField创建相应的对象

#import "SFCustomTextField.h"

@implementation SFCustomTextField

/*

// 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)boundst

{
//获取clearButton的系统位置及大小
    CGRect rect = [super clearButtonRectForBounds:boundst];
//将clearButton沿着X轴移动 -10个单位长度后，返回相应的rect
    return CGRectOffset(rect, -10, 0);

}

(CGRect)editingRectForBounds:(CGRect)bounds {

    CGRect rect = [super editingRectForBounds:bounds];
//应用于调整rect的insets
        UIEdgeInsets insets = UIEdgeInsetsMake(0, 0, 0 ,5);

    return UIEdgeInsetsInsetRect(rect, insets);

}

@end

在其他类中使用SFCustomTextField,创建对象

#import "SFBindingOfAcountViewController.h"

@property (nonatomic, strong) SFCustomTextField *acountTextField;
@property (nonatomic, strong) SFCustomTextField *passwordTextField;

@end

@implementation SFBindingOfAcountViewController

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self customUI];
}

-(void)customUI
{

self.normalLoginView = [SFPublicMethod initViewOnSuperview:self.view WithFrame:CGRectMake(0, CGRectGetMaxY(line1.frame), kScreenViewWidth, 100) backgroundColor:GET_COLOR(@"#ffffff")];
CGSize acountLableSize = [SFPublicMethod getTextSizeWithText:@"账户名" size:CGSizeMake(kScreenViewWidth, 49.5) font:GET_FONT(15)];
UILabel *acountNameLable = [SFPublicMethod addLabelWithFrame:CGRectMake(15, 0, acountLableSize.width, 49.5) LabelFont:GET_FONT(15) LabelTextColor:GET_COLOR(@"#565c67") LabelTextAlignment:NSTextAlignmentLeft SuperView:self.normalLoginView LabelTag:773 LabelText:@"账户名"];
UIView *line2 = [SFPublicMethod addLineViewFromPoint:CGPointMake(15, 50.5) Width:kScreenViewWidth - 15 SuperView:self.normalLoginView tag:884 withColor:GET_COLOR(@"#f2f2f2")];

UILabel *passwordNameLable = [SFPublicMethod addLabelWithFrame:CGRectMake(15, CGRectGetMaxY(line2.frame), acountLableSize.width, 49.5) LabelFont:GET_FONT(15) LabelTextColor:GET_COLOR(@"#565c67") LabelTextAlignment:NSTextAlignmentLeft SuperView:self.normalLoginView LabelTag:774 LabelText:@"密码"];
//输入的账号.密码

-------------使用SFCustomTextField创建对象---------------------------

self.acountTextField = [[SFCustomTextField alloc] initWithFrame:CGRectMake(CGRectGetMaxX(acountNameLable.frame) + 18, 0,kScreenViewWidth - CGRectGetMaxX(acountNameLable.frame) - 18, 49.5)];
self.acountTextField.placeholder = @"用户名/邮箱/手机号";
self.acountTextField.textColor = GET_COLOR(@"#000000");
self.acountTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
self.acountTextField.delegate = self;
self.acountTextField.tag = 990;
[self.normalLoginView addSubview:self.acountTextField];
self.acountTextField.font = GET_FONT(15);
[self.acountTextField becomeFirstResponder];

---------------------使用SFCustomTextField创建对象-----------------------------

self.passwordTextField = [[SFCustomTextField alloc] initWithFrame:CGRectMake(CGRectGetMaxX(passwordNameLable.frame) + 18, CGRectGetMinY(passwordNameLable.frame),kScreenViewWidth - CGRectGetMaxX(passwordNameLable.frame) - 18, 49.5)];
self.passwordTextField.placeholder = @"请输入密码";
self.passwordTextField.textColor = GET_COLOR(@"#000000");
self.passwordTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
self.passwordTextField.delegate = self;
self.passwordTextField.tag = 991;
[self.normalLoginView addSubview:self.passwordTextField];
self.passwordTextField.font = GET_FONT(15);
_passwordTextField.secureTextEntry = YES;

}

@end