iOS 打印中文的显示问题

在开发中经常会打印字典数组中的数据，其中的中文会显示成\Uxxxx

之前的方案只支持一层解析，现在的方案可以解析了里面所有的对象。

• 1、iOS中打印时，中文一般会被默认转换为Unicode字符的形式。
• 2、针对字典和数组，可通过增加分类，并在分类中重写 descriptionWithLocale: 方法的形式，实现打印结果中直接显示中文
• 3、写分类的时候要带上前缀 TP 后面是这个分类表达的意思 例如 NSArray+TPDecription

#import "NSArray+TPDecription.h"

@implementation NSArray (TPDecription)

#if DEBUG
- (NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level {
    NSMutableString *desc = [NSMutableString string];
    
    NSMutableString *tabString = [[NSMutableString alloc] initWithCapacity:level];
    for (NSUInteger i = 0; i < level; ++i) {
        [tabString appendString:@"\t"];
    }
    
    NSString *tab = @"";
    if (level > 0) {
        tab = tabString;
    }
    [desc appendString:@"\t(\n"];
    
    for (id obj in self) {
        if (![obj respondsToSelector:@selector(description)]) {
            continue;
        }
        
        if ([obj isKindOfClass:[NSDictionary class]]
            || [obj isKindOfClass:[NSArray class]]
            || [obj isKindOfClass:[NSSet class]]) {
            NSString *str = [((NSDictionary *)obj) descriptionWithLocale:locale indent:level + 1];
            [desc appendFormat:@"%@\t%@,\n", tab, str];
        } else if ([obj isKindOfClass:[NSString class]]) {
            [desc appendFormat:@"%@\t\"%@\",\n", tab, obj];
        } else if ([obj isKindOfClass:[NSData class]]) {
            // 如果是NSData类型，尝试去解析结果，以打印出可阅读的数据
            NSError *error = nil;
            NSObject *result =  [NSJSONSerialization JSONObjectWithData:obj
                                                                options:NSJSONReadingMutableContainers
                                                                  error:&error];
            // 解析成功
            if (error == nil && result != nil) {
                if ([result isKindOfClass:[NSDictionary class]]
                    || [result isKindOfClass:[NSArray class]]
                    || [result isKindOfClass:[NSSet class]]) {
                    NSString *str = [((NSDictionary *)result) descriptionWithLocale:locale indent:level + 1];
                    [desc appendFormat:@"%@\t%@,\n", tab, str];
                } else if ([obj isKindOfClass:[NSString class]]) {
                    [desc appendFormat:@"%@\t\"%@\",\n", tab, result];
                }
            } else {
                @try {
                    NSString *str = [[NSString alloc] initWithData:obj encoding:NSUTF8StringEncoding];
                    if (str != nil) {
                        [desc appendFormat:@"%@\t\"%@\",\n", tab, str];
                    } else {
                        [desc appendFormat:@"%@\t%@,\n", tab, obj];
                    }
                }
                @catch (NSException *exception) {
                    [desc appendFormat:@"%@\t%@,\n", tab, obj];
                }
            }
        } else {
            @try {
                [desc appendFormat:@"%@\t%@,\n", tab, obj];
            } @catch (NSException *exception) {
                
            } @finally {
                
            }
        }
    }
    
    [desc appendFormat:@"%@)", tab];
    
    return desc;
}
#endif

@end

#import "NSDictionary+TPDecription.h"

@implementation NSDictionary (TPDecription)

#if DEBUG
- (NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level {
    NSMutableString *desc = [NSMutableString string];
    
    NSMutableString *tabString = [[NSMutableString alloc] initWithCapacity:level];
    for (NSUInteger i = 0; i < level; ++i) {
        [tabString appendString:@"\t"];
    }
    
    NSString *tab = @"";
    if (level > 0) {
        tab = tabString;
    }
    
    [desc appendString:@"\t{\n"];
    
    // 遍历数组,self就是当前的数组
    for (id key in self.allKeys) {
        id obj = [self objectForKey:key];
        
        if (![obj respondsToSelector:@selector(description)]) {
            continue;
        }
        
        if ([obj isKindOfClass:[NSString class]]) {
            [desc appendFormat:@"%@\t%@ = \"%@\",\n", tab, key, obj];
        } else if ([obj isKindOfClass:[NSArray class]]
                   || [obj isKindOfClass:[NSDictionary class]]
                   || [obj isKindOfClass:[NSSet class]]) {
            [desc appendFormat:@"%@\t%@ = %@,\n", tab, key, [obj descriptionWithLocale:locale indent:level + 1]];
        } else if ([obj isKindOfClass:[NSData class]]) {
            // 如果是NSData类型，尝试去解析结果，以打印出可阅读的数据
            NSError *error = nil;
            NSObject *result =  [NSJSONSerialization JSONObjectWithData:obj
                                                                options:NSJSONReadingMutableContainers
                                                                  error:&error];
            // 解析成功
            if (error == nil && result != nil) {
                if ([result isKindOfClass:[NSDictionary class]]
                    || [result isKindOfClass:[NSArray class]]
                    || [result isKindOfClass:[NSSet class]]) {
                    NSString *str = [((NSDictionary *)result) descriptionWithLocale:locale indent:level + 1];
                    [desc appendFormat:@"%@\t%@ = %@,\n", tab, key, str];
                } else if ([obj isKindOfClass:[NSString class]]) {
                    [desc appendFormat:@"%@\t%@ = \"%@\",\n", tab, key, result];
                }
            } else {
                @try {
                    NSString *str = [[NSString alloc] initWithData:obj encoding:NSUTF8StringEncoding];
                    if (str != nil) {
                        [desc appendFormat:@"%@\t%@ = \"%@\",\n", tab, key, str];
                    } else {
                        [desc appendFormat:@"%@\t%@ = %@,\n", tab, key, obj];
                    }
                }
                @catch (NSException *exception) {
                    [desc appendFormat:@"%@\t%@ = %@,\n", tab, key, obj];
                }
            }
        } else {
            @try {
                [desc appendFormat:@"%@\t%@ = %@,\n", tab, key, obj];
            } @catch (NSException *exception) {
                
            } @finally {
                
            }
        }
    }
    
    [desc appendFormat:@"%@}", tab];
    
    return desc;
}
#endif

@end

这两个分类写完直接拖到项目中就可以了

• NSDictionary+TPDecription
• NSArray+TPDecription

sh