iOS开发系列之常用自定义控件开发集—进度条Loading控件开发

在很多项目中，经常要进行网络请求操作而为了更好的用户体验和美观，我们需要定制开发网络加载控件，下面是自定义网络加载控件实现方式：
头文件UIView+WHC_Loading.h实现：

////  UIView+WHC_Loading.h//  UIView+WHC_Loading////  Created by 吴海超 on 15/3/25.//  Copyright (c) 2015年 吴海超. All rights reserved.//#import <UIKit/UIKit.h>@interface UIView (WHC_Loading)- (void)startLoading;- (void)stopLoading;- (void)startLoadingWithTxt:(NSString*)customTitle;- (void)stopLoadingWithTxt;- (void)startLoadingWithTxtUser:(NSString*)customTitle;- (void)stopLoadingWithTxtUser;- (void)startLoadingWithUser;- (void)stopLoadingWithUser;@end

源文件UIView+WHC_Loading.m实现方式：

////  UIView+WHC_Loading.m//  UIView+WHC_Loading////  Created by 吴海超 on 15/3/25.//  Copyright (c) 2015年 吴海超. All rights reserved.//#import "UIView+WHC_Loading.h"#define KWHC_LOADING_VIEW_SIZE (50.0)                 //显示不带提示文字view的尺寸#define KWHC_FONT_SIZE (15.0)                         //默认字体大小#define KWHC_LOADING_VIEW_SIZE_TXT (100.0)            //显示带提示文字view的尺寸#define KWHC_LOADING_LABLE_HEIGHT (15.0)              //文字提示高度#define KWHC_LOADING_VIEW_CORNER (10.0)               //圆角#define KWHC_LOADING_VIEW_ALPHA (0.8)                 //透明度#define KWHC_LOADING_VIEW_TAG (10000000)              //tag值#define KWHC_LOADING_TXT (@"请稍等")                   //默认提示信息@implementation UIView (WHC_Loading)//创建主view- (UIView *)createLoadingViewWithIsTxt:(BOOL)isTxt customTitle:(NSString *)customTitle{    CGSize  screenSize = [UIScreen mainScreen].bounds.size;    CGFloat backViewSize = KWHC_LOADING_VIEW_SIZE;    if(isTxt){        if(customTitle == nil){            customTitle = KWHC_LOADING_TXT;        }        if(customTitle.length == 0){            customTitle = KWHC_LOADING_TXT;        }        backViewSize = KWHC_LOADING_VIEW_SIZE_TXT;    }    UIView * backView = [[UIView alloc]initWithFrame:CGRectMake((screenSize.width - backViewSize) / 2.0, screenSize.height / 2.0, backViewSize, backViewSize)];    backView.layer.cornerRadius = KWHC_LOADING_VIEW_CORNER;    backView.backgroundColor = [UIColor blackColor];    backView.alpha = KWHC_LOADING_VIEW_ALPHA;    backView.clipsToBounds = YES;    backView.tag = KWHC_LOADING_VIEW_TAG;    UIActivityIndicatorView  * indicatorView = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];    if(isTxt){        indicatorView.center = CGPointMake(CGRectGetWidth(backView.frame) / 2.0, (CGRectGetHeight(backView.frame) - KWHC_LOADING_LABLE_HEIGHT)/ 2.0);    }else{        indicatorView.center = CGPointMake(CGRectGetWidth(backView.frame) / 2.0, CGRectGetHeight(backView.frame) / 2.0);    }    [indicatorView startAnimating];    [backView addSubview:indicatorView];    if(isTxt){//判断是否有提示信息        UILabel * labTxt = [[UILabel alloc]initWithFrame:CGRectMake(0.0, CGRectGetHeight(indicatorView.frame) + indicatorView.frame.origin.y+ 5.0, CGRectGetWidth(backView.frame), KWHC_LOADING_LABLE_HEIGHT)];        labTxt.backgroundColor = [UIColor clearColor];        labTxt.minimumScaleFactor = 0.2;           //设置字体缩放英子0.2        labTxt.adjustsFontSizeToFitWidth = YES;    //设置能够调整字体大小自适应        labTxt.text = customTitle;        labTxt.textAlignment = NSTextAlignmentCenter;        labTxt.textColor = [UIColor whiteColor];        [backView addSubview:labTxt];    }    return backView;}/* 显示网络加载控件 isUser:显示菊花控件时用户是否可以触摸交互 isTxt:是否要显示文字提示标签 customTitle:要显示的提示文字 */- (void)baseStartLoadingWithUser:(BOOL)isUser withIsTxt:(BOOL)isTxt customTitle:(NSString*)customTitle{    UIView * loadingView = [self viewWithTag:KWHC_LOADING_VIEW_TAG];    if(loadingView == nil){        self.alpha = 0.5;        self.userInteractionEnabled = isUser;  //用户是否可以交互        [self addSubview:[self createLoadingViewWithIsTxt:isTxt customTitle:customTitle]];    }}/* 隐藏网络加载控件 isUser:显示菊花控件时用户是否可以触摸交互 */- (void)baseStopLoadingWithUser:(BOOL)isUser{    UIView * clearView = [self viewWithTag:KWHC_LOADING_VIEW_TAG];    if(clearView != nil){        self.alpha = 1.0;        self.userInteractionEnabled = isUser;        [clearView removeFromSuperview];        clearView = nil;    }}/* 显示网络加载控件 note:该方式用户不能交互，不显示提示文字信息 */- (void)startLoading{    [self baseStartLoadingWithUser:NO withIsTxt:NO customTitle:nil];}/* 隐藏网络加载控件 */- (void)stopLoading{    [self baseStopLoadingWithUser:YES];}/* 显示网络加载控件 用户不可以触摸交互 customTitle:要显示的提示文字 */- (void)startLoadingWithTxt:(NSString*)customTitle{    [self baseStartLoadingWithUser:NO withIsTxt:YES customTitle:customTitle];}/* 隐藏网络加载控件 */- (void)stopLoadingWithTxt{    [self stopLoading];}/* 显示网络加载控件 用户可以触摸交互 customTitle:要显示的提示文字 */- (void)startLoadingWithTxtUser:(NSString*)customTitle{    [self baseStartLoadingWithUser:YES withIsTxt:YES customTitle:customTitle];}/* 隐藏网络加载控件 */- (void)stopLoadingWithTxtUser{    [self stopLoading];}/* 显示网络加载控件 用户可以触摸交互 无显示的提示文字 */- (void)startLoadingWithUser{    [self baseStartLoadingWithUser:YES withIsTxt:NO customTitle:nil];}/* 隐藏网络加载控件 */- (void)stopLoadingWithUser{    [self stopLoading];}@end

运行效果：