BlockTest.h #import <Foundation/Foundation.h> typedef void (^didFinishBlock)(NSString *str);
typedef void (^didFailBlock)(NSString *str); @interface BlockTest : NSObject +(void)justForTest:(NSString *)string finishBlock:(didFinishBlock)finishBlock failBlock:(didFailBlock)failBlock; @end BlockTest.m #import "BlockTest.h" @implementation BlockTest +(void)justForTest:(NSString *)string finishBlock:(didFinishBlock)finishBlock failBlock:(didFailBlock)failBlock
{
if ([string isEqualToString:@"test"]) {
finishBlock(string);
}
else
{
failBlock(@"参数错误");
} } @end // 使用 [BlockTest justForTest:@"testt" finishBlock:^(NSString *str) {
NSLog(@"%@",str);
} failBlock:^(NSString *str) {
NSLog(@"%@",str);
}];