iOS_处理网络请求数据打印问题_记录用

//
//  WSKPrintJsonLog.h
//  SuperSaleApp
//
//  Created by 王盛魁 on 2020/3/5.
//  Copyright © 2020 wangsk. All rights reserved.
//
#import 

//
//  WSKPrintJsonLog.m
//  SuperSaleApp
//
//  Created by 王盛魁 on 2020/3/5.
//  Copyright © 2020 wangsk. All rights reserved.
//

#import "WSKPrintJsonLog.h"
#import 

#pragma mark - 方法交换

static inline void sq_swizzleSelector(Class class, SEL originalSelector, SEL swizzledSelector) {
    
    Method originalMethod = class_getInstanceMethod(class, originalSelector);
    Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
    
    BOOL didAddMethod = class_addMethod(class,
                                        originalSelector,
                                        method_getImplementation(swizzledMethod),
                                        method_getTypeEncoding(swizzledMethod));
    if (didAddMethod) {
        class_replaceMethod(class,
                            swizzledSelector,
                            method_getImplementation(originalMethod),
                            method_getTypeEncoding(originalMethod));
    } else {
        method_exchangeImplementations(originalMethod, swizzledMethod);
    }
}


#pragma mark - NSObject分类

@implementation NSObject (WSKJSON)
//将obj转换成json字符串。如果失败则返回nil.
- (NSString *)convertToJsonString {
    if (![NSJSONSerialization isValidJSONObject:self])  return nil;
    	NSError *error = nil;
   	 	NSData *jsonData = [NSJSONSerialization dataWithJSONObject:self options:NSJSONWritingPrettyPrinted  error:&error];
    if (error || !jsonData) return nil;
    	NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    return jsonString;
}
@end


#pragma mark - NSDictionary分类
@implementation NSDictionary (WSKJsonLog)
//用此方法交换系统的 descriptionWithLocale: 方法。该方法在代码打印的时候调用。
- (NSString *)sqjsonlog_descriptionWithLocale:(id)locale{
	NSString *result = [self convertToJsonString];//转换成JSON格式字符串
    if (!result) return [self sqjsonlog_descriptionWithLocale:locale];//如果无法转换，就使用原先的格式
    return result;
}


//用此方法交换系统的 descriptionWithLocale:indent:方法。功能同上。
- (NSString *)sqjsonlog_descriptionWithLocale:(id)locale indent:(NSUInteger)level {
    NSString *result = [self convertToJsonString];
    if (!result) return [self sqjsonlog_descriptionWithLocale:locale indent:level];
    return result;
}


//用此方法交换系统的 debugDescription 方法。该方法在控制台使用po打印的时候调用。
- (NSString *)sqjsonlog_debugDescription{
    
    NSString *result = [self convertToJsonString];
    if (!result) return [self sqjsonlog_debugDescription];
    return result;
}


//在load方法中完成方法交换
+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Class class = [self class];
        sq_swizzleSelector(class, @selector(descriptionWithLocale:), @selector(sqjsonlog_descriptionWithLocale:));
        sq_swizzleSelector(class, @selector(descriptionWithLocale:indent:), @selector(sqjsonlog_descriptionWithLocale:indent:));
        sq_swizzleSelector(class, @selector(debugDescription), @selector(sqjsonlog_debugDescription));
    });
}
@end


#pragma mark - NSArray分类
@implementation NSArray (WSKJsonLog)
//用此方法交换系统的 descriptionWithLocale: 方法。该方法在代码打印的时候调用。
- (NSString *)sqjsonlog_descriptionWithLocale:(id)locale{
    NSString *result = [self convertToJsonString];
    if (!result) return [self sqjsonlog_descriptionWithLocale:locale];
    return result;
}


//用此方法交换系统的 descriptionWithLocale:indent:方法。功能同上。
- (NSString *)sqjsonlog_descriptionWithLocale:(id)locale indent:(NSUInteger)level {
    NSString *result = [self convertToJsonString];
    if (!result) return [self sqjsonlog_descriptionWithLocale:locale indent:level];
    return result;
}


//用此方法交换系统的 debugDescription 方法。该方法在控制台使用po打印的时候调用。
- (NSString *)sqjsonlog_debugDescription{
    NSString *result = [self convertToJsonString];
    if (!result) return [self sqjsonlog_debugDescription];
    return result;
}


+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Class class = [self class];
        sq_swizzleSelector(class, @selector(descriptionWithLocale:), @selector(sqjsonlog_descriptionWithLocale:));
        sq_swizzleSelector(class, @selector(descriptionWithLocale:indent:), @selector(sqjsonlog_descriptionWithLocale:indent:));
        sq_swizzleSelector(class, @selector(debugDescription), @selector(sqjsonlog_debugDescription));
    });
}
@end