167 lines
5.7 KiB
Objective-C
Executable File
167 lines
5.7 KiB
Objective-C
Executable File
//
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// PrintBeautifulLog.m
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// PrintBeautifulLog
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//
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// Created by 石学谦 on 2018/9/14.
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// Copyright © 2018年 shixueqian. All rights reserved.
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//
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/*
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将字典（NSDictionary）和数组（NSArray）转化成JSON格式字符串输出到控制台。
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可以正常在控制台输出中文。
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直接将这个文件拖到工程中即可生效。
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*/
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//DEBUG模式生效
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#ifdef DEBUG
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#import "PrintBeautifulLog.h"
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#import <objc/runtime.h>
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#pragma mark - 方法交换
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static inline void sq_swizzleSelector(Class class, SEL originalSelector, SEL swizzledSelector) {
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Method originalMethod = class_getInstanceMethod(class, originalSelector);
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Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
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BOOL didAddMethod = class_addMethod(class,
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originalSelector,
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method_getImplementation(swizzledMethod),
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method_getTypeEncoding(swizzledMethod));
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if (didAddMethod) {
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class_replaceMethod(class,
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swizzledSelector,
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method_getImplementation(originalMethod),
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method_getTypeEncoding(originalMethod));
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} else {
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method_exchangeImplementations(originalMethod, swizzledMethod);
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}
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}
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#pragma mark - NSObject分类
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@implementation NSObject (PrintBeautifulLog)
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//将obj转换成json字符串。如果失败则返回nil.
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- (NSString *)convertToJsonString {
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//先判断是否能转化为JSON格式
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if (![NSJSONSerialization isValidJSONObject:self]) return nil;
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NSError *error = nil;
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NSJSONWritingOptions jsonOptions = NSJSONWritingPrettyPrinted;
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if (@available(iOS 11.0, *)) {
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//11.0之后，可以将JSON按照key排列后输出，看起来会更舒服
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jsonOptions = NSJSONWritingPrettyPrinted | NSJSONWritingSortedKeys ;
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}
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//核心代码，字典转化为有格式输出的JSON字符串
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NSData *jsonData = [NSJSONSerialization dataWithJSONObject:self options:NSJSONWritingPrettyPrinted error:&error];
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if (error || !jsonData) return nil;
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NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
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return jsonString;
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}
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@end
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#pragma mark - NSDictionary分类
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@implementation NSDictionary (PrintBeautifulLog)
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//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。
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- (NSString *)printlog_descriptionWithLocale:(id)locale{
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NSString *result = [self convertToJsonString];//转换成JSON格式字符串
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if (!result) {
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result = [self printlog_descriptionWithLocale:locale];//如果无法转换，就使用原先的格式
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return result;
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}
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return result;
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}
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//用此方法交换系统的 descriptionWithLocale:indent:方法。功能同上。
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- (NSString *)printlog_descriptionWithLocale:(id)locale indent:(NSUInteger)level {
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NSString *result = [self convertToJsonString];
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if (!result) {
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result = [self printlog_descriptionWithLocale:locale indent:level];//如果无法转换，就使用原先的格式
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return result;
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}
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return result;
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}
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//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。
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- (NSString *)printlog_debugDescription{
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NSString *result = [self convertToJsonString];
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if (!result) return [self printlog_debugDescription];
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return result;
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}
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//在load方法中完成方法交换
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+ (void)load {
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//方法交换
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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Class class = [self class];
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sq_swizzleSelector(class, @selector(descriptionWithLocale:), @selector(printlog_descriptionWithLocale:));
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sq_swizzleSelector(class, @selector(descriptionWithLocale:indent:), @selector(printlog_descriptionWithLocale:indent:));
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sq_swizzleSelector(class, @selector(debugDescription), @selector(printlog_debugDescription));
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});
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}
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@end
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#pragma mark - NSArray分类
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@implementation NSArray (PrintBeautifulLog)
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//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。
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- (NSString *)printlog_descriptionWithLocale:(id)locale{
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NSString *result = [self convertToJsonString];//转换成JSON格式字符串
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if (!result) {
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result = [self printlog_descriptionWithLocale:locale];//如果无法转换，就使用原先的格式
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return result;
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}
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return result;
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}
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//用此方法交换系统的 descriptionWithLocale:indent:方法。功能同上。
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- (NSString *)printlog_descriptionWithLocale:(id)locale indent:(NSUInteger)level {
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NSString *result = [self convertToJsonString];
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if (!result) {
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result = [self printlog_descriptionWithLocale:locale indent:level];//如果无法转换，就使用原先的格式
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return result;
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}
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return result;
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}
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//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。
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- (NSString *)printlog_debugDescription{
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NSString *result = [self convertToJsonString];
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if (!result) return [self printlog_debugDescription];
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return result;
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}
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//在load方法中完成方法交换
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+ (void)load {
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//方法交换
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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Class class = [self class];
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sq_swizzleSelector(class, @selector(descriptionWithLocale:), @selector(printlog_descriptionWithLocale:));
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sq_swizzleSelector(class, @selector(descriptionWithLocale:indent:), @selector(printlog_descriptionWithLocale:indent:));
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sq_swizzleSelector(class, @selector(debugDescription), @selector(printlog_debugDescription));
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});
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}
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@end
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#endif
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