Implicit conversion of 'int' to 'UILabel *' is disallowed with ARC

Question

I got a compiling error "Implicit conversion of 'int' to 'UILabel *' is disallowed with ARC" in the code below.

UILabel* (^makeLabel)(CGFloat, CGFloat, CGFloat, CGFloat, NSString*) = ^(CGFloat x, CGFloat y, CGFloat w, CGFloat h, NSString* title) {
    UILabel* label = [[UILabel alloc] init];
    label.frame = CGRectMake(x, y, w, h);
    label.text = title;
    label.font = [UIFont systemFontOfSize:14];
    return label;
};

UILabel* lblEmail = mekeLabel(30, 100, 100, 30, @"이메일");

What should I do to solve this problem?

Answer 1

you need to define the return type explicitly everywhere, like:

UILabel * (^makeLabel)(CGFloat, CGFloat, CGFloat, CGFloat, NSString *) = ^UILabel *(CGFloat x, CGFloat y, CGFloat w, CGFloat h, NSString * title) {
    UILabel * label = [[UILabel alloc] init];
    label.frame = CGRectMake(x, y, w, h);
    label.text = title;
    label.font = [UIFont systemFontOfSize:14];
    return label;
};

then this will work flawlessly:

UILabel * lblEmail = makeLabel(30, 100, 100, 30, @"이메일");