objective-c – GCRectMake的iOS错误 – 将’int’发送到不兼容类型’CGRect'(又名’struct CGRect’)的参数

概述我是iOS编程的新手. 我正在关注一本指南,这本书正是在意大利语的iOS上. 对于第一个应用程序,我必须像这样修改ViewController.m： #import "ViewController.h"@implementation ViewController- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarni 我是iOS编程的新手.

我正在关注一本指南,这本书正是在意大利语的iOS上.
对于第一个应用程序,我必须像这样修改VIEwController.m：

#import "VIEwController.h"@implementation VIEwController- (voID)dIDReceiveMemoryWarning{    [super dIDReceiveMemoryWarning];    // Release Any chached data,images,etc that aren't in use.}    - (voID)vIEwDIDLoad{    [super vIEwDIDLoad];    // Do any additional setup after loading the vIEw,typically from a nib.}- (voID)datIDettaglioChiudi:(datIDettaglio *)controller{    //altre operazioni possibii dopo la dismissModal    NSLog(@"... di ritorno dal dismissModal...");    [controller dismissVIEwControllerAnimated:YES completion:nil];}- (voID)prepareForSegue:(UIStoryboardSegue *)segue sender:(ID)sender{    if([segue.IDentifIEr isEqualToString:@"dettaglio"]){        datIDettaglio *mioController1 = segue.destinationVIEwController;        [mioController1 setDelegate:self];        //aggiunta di una UILabel - qui è possibile personalizzare la propria vista     direttamente da codice        UILabel *testLabel = [[UILabel alloc] initWithFrame: GCRectMake(30,100,250,40)];        [testLabel setText:@"Etichetta di test"];        [testLabel setBackgroundcolor:[UIcolor greencolor]];        [testLabel setTextcolor:[UIcolor blackcolor]];        [mioController1.vIEw addSubvIEw:testLabel];    }}- (voID)vIEwWillAppear:(BOol)animated{    [super vIEwWillAppear:animated];}@end

问题出在这里：

UILabel *testLabel = [[UILabel alloc] initWithFrame: GCRectMake(30,40)];

在GCRectMake上：我有一个警告和一个错误：

WARNING Implicit declaration of function 'GCRectMake' is invalID in C99ERROR   Sending 'int' to parameter of incompatible type 'CGRect' (aka 'struct CGRect')

我真的无法理解有什么不对.

解决方法 它是CGRectMake,而不是GCRectMake. CG代表Core Graphics. 总结

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