NSObject+Extension.h
#import <Foundation/Foundation.h>
@interface NSObject (Extension)
- (id)performSelector:(SEL)selector withObjects:(NSArray *)objects;
@end
NSObject+Extension.m
#import "NSObject+Extension.h"
@implementation NSObject (Extension)
- (id)performSelector:(SEL)selector withObjects:(NSArray *)objects{
// 方法簽名(方法的描述)
NSMethodSignature *signature = [[self class] instanceMethodSignatureForSelector:selector];
if (signature == nil) {
// @throw [NSException exceptionWithName:@"錯誤" reason:@"方法找不到" userInfo:nil];
[NSException raise:@"錯誤" format:@"%@方法找不到", NSStringFromSelector(selector)];
}
// NSInvocation : 利用一個NSInvocation對象包裝一次方法調用（方法調用者、方法名、方法參數、方法返回值）
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
invocation.target = self;
invocation.selector = selector;
// 設置參數
NSInteger paramsCount = signature.numberOfArguments - 2; // 除self、_cmd以外的參數個數
paramsCount = MIN(paramsCount, objects.count);
for (NSInteger i = 0; i < paramsCount; i++) {
id object = objects[i];
if ([object isKindOfClass:[NSNull class]]) continue;
[invocation setArgument:&object atIndex:i + 2];
}
// 調用方法
[invocation invoke];
// 獲取返回值
id returnValue = nil;
if (signature.methodReturnLength) { // 有返回值類型，才去獲得返回值
[invocation getReturnValue:&returnValue];
}
return returnValue;
}
@end
在AppDelegate.m中可以捕獲異常
@implementation AppDelegate
/**
* 崩潰統計
* 1.友盟
* 2.Flurry
* 3.Crashlytics
*/
/**
* 攔截異常
*/
void handleException(NSException *exception){
NSMutableDictionary *info = [NSMutableDictionary dictionary];
info[@"callStack"] = [exception callStackSymbols]; // 調用棧信息（錯誤來源于哪個方法）
info[@"name"] = [exception name]; // 異常名字
info[@"reason"] = [exception reason]; // 異常描述（報錯理由）
// [info writeToFile:<#(NSString *)#> atomically:<#(BOOL)#>];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// 將沙盒中的錯誤信息傳遞給服務器
// 設置捕捉異常的回調
NSSetUncaughtExceptionHandler(handleException);
return YES;
}
@end
